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Moved built-in policies from external files to internal database. (#75)
This commit is contained in:
Joe Testa
parent
2a7b9292bb
commit
046c866da4
12
README.md
12
README.md
@ -47,7 +47,8 @@ usage: ssh-audit.py [options] <host>
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adhere to)
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-n, --no-colors disable colors
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-p, --port=<port> port to connect
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-P, --policy=<policy.txt> run a policy test using the specified policy
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-P, --policy=<"policy name" | policy.txt> run a policy test using the
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specified policy
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-t, --timeout=<secs> timeout (in seconds) for connection and reading
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(default: 5)
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-T, --targets=<hosts.txt> a file containing a list of target hosts (one
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@ -92,17 +93,17 @@ ssh-audit -L
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To run a policy audit against a server:
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```
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ssh-audit -P path/to/server_policy targetserver
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ssh-audit -P ["policy name" | path/to/server_policy.txt] targetserver
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```
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To run a policy audit against a client:
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```
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ssh-audit -c -P path/to/client_policy
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ssh-audit -c -P ["policy name" | path/to/client_policy.txt]
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```
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To run a policy audit against many servers:
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```
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ssh-audit -T servers.txt -P path/to/server_policy
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ssh-audit -T servers.txt -P ["policy name" | path/to/server_policy.txt]
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```
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To create a policy based on a target server (which can be manually edited; see official built-in policies for syntax examples):
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@ -151,8 +152,9 @@ For convenience, a web front-end on top of the command-line tool is available at
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## ChangeLog
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### v2.3.1-dev (???)
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- Migrated pre-made policies from external files to internal database.
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- Split single 3,500 line script into many files (by class).
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- Added setup.py support; credit [Ganden Schaffner](https://github.com/gschaffner)
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- Added setup.py support; credit [Ganden Schaffner](https://github.com/gschaffner).
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- Added 1 new cipher: `des-cbc@ssh.com`.
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### v2.3.0 (2020-09-27)
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@ -489,8 +489,25 @@ function run_test {
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echo -e "${test_name} ${GREEN}passed${CLR}."
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}
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function run_builtin_policy_test {
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policy_name=$1 # The built-in policy name to use.
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version=$2 # Version of OpenSSH to test with.
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test_number=$3 # The test number to run.
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server_options=$4 # The options to start the server with (i.e.: "-o option1,options2,...")
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expected_exit_code=$5 # The expected exit code of ssh-audit.py.
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function run_policy_test {
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server_exec="/openssh/sshd-${version} -D -f /etc/ssh/sshd_config-8.0p1_test1 ${server_options}"
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test_result_stdout="${TEST_RESULT_DIR}/openssh_${version}_builtin_policy_${test_number}.txt"
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test_result_json="${TEST_RESULT_DIR}/openssh_${version}_builtin_policy_${test_number}.json"
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expected_result_stdout="test/docker/expected_results/openssh_${version}_builtin_policy_${test_number}.txt"
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expected_result_json="test/docker/expected_results/openssh_${version}_builtin_policy_${test_number}.json"
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test_name="OpenSSH ${version} built-in policy ${test_number}"
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run_policy_test "${test_name}" "${server_exec}" "${policy_name}" "${test_result_stdout}" "${test_result_json}" "${expected_exit_code}"
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}
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function run_custom_policy_test {
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config_number=$1 # The configuration number to use.
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test_number=$2 # The policy test number to run.
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expected_exit_code=$3 # The expected exit code of ssh-audit.py.
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@ -510,11 +527,24 @@ function run_policy_test {
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server_exec="/openssh/sshd-${version} -D -f /etc/ssh/${config}"
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policy_path="test/docker/policies/policy_${test_number}.txt"
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test_result_stdout="${TEST_RESULT_DIR}/openssh_${version}_policy_${test_number}.txt"
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test_result_json="${TEST_RESULT_DIR}/openssh_${version}_policy_${test_number}.json"
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expected_result_stdout="test/docker/expected_results/openssh_${version}_policy_${test_number}.txt"
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expected_result_json="test/docker/expected_results/openssh_${version}_policy_${test_number}.json"
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test_name="OpenSSH ${version} policy ${test_number}"
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test_result_stdout="${TEST_RESULT_DIR}/openssh_${version}_custom_policy_${test_number}.txt"
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test_result_json="${TEST_RESULT_DIR}/openssh_${version}_custom_policy_${test_number}.json"
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expected_result_stdout="test/docker/expected_results/openssh_${version}_custom_policy_${test_number}.txt"
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expected_result_json="test/docker/expected_results/openssh_${version}_custom_policy_${test_number}.json"
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test_name="OpenSSH ${version} custom policy ${test_number}"
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run_policy_test "${test_name}" "${server_exec}" "${policy_path}" "${test_result_stdout}" "${test_result_json}" "${expected_exit_code}"
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}
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function run_policy_test {
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test_name=$1
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server_exec=$2
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policy_path=$3
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test_result_stdout=$4
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test_result_json=$5
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expected_exit_code=$6
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#echo "Running: docker run -d -p 2222:22 ${IMAGE_NAME}:${IMAGE_VERSION} ${server_exec}"
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cid=`docker run -d -p 2222:22 ${IMAGE_NAME}:${IMAGE_VERSION} ${server_exec}`
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@ -523,8 +553,8 @@ function run_policy_test {
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exit 1
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fi
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#echo "Running: ./ssh-audit.py -P ${policy_path} localhost:2222 > ${test_result_stdout}"
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./ssh-audit.py -P ${policy_path} localhost:2222 > ${test_result_stdout}
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#echo "Running: ./ssh-audit.py -P \"${policy_path}\" localhost:2222 > ${test_result_stdout}"
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./ssh-audit.py -P "${policy_path}" localhost:2222 > ${test_result_stdout}
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actual_exit_code=$?
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if [[ ${actual_exit_code} != ${expected_exit_code} ]]; then
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echo -e "${test_name} ${REDB}FAILED${CLR} (expected exit code: ${expected_exit_code}; actual exit code: ${actual_exit_code}\n"
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@ -533,8 +563,8 @@ function run_policy_test {
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exit 1
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fi
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#echo "Running: ./ssh-audit.py -P ${policy_path} -j localhost:2222 > ${test_result_json}"
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./ssh-audit.py -P ${policy_path} -j localhost:2222 > ${test_result_json}
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#echo "Running: ./ssh-audit.py -P \"${policy_path}\" -j localhost:2222 > ${test_result_json}"
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./ssh-audit.py -P "${policy_path}" -j localhost:2222 > ${test_result_json}
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actual_exit_code=$?
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if [[ ${actual_exit_code} != ${expected_exit_code} ]]; then
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echo -e "${test_name} ${REDB}FAILED${CLR} (expected exit code: ${expected_exit_code}; actual exit code: ${actual_exit_code}\n"
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@ -627,36 +657,42 @@ echo
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run_tinyssh_test '20190101' 'test1' $PROGRAM_RETVAL_WARNING
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echo
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echo
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run_policy_test 'config1' 'test1' $PROGRAM_RETVAL_GOOD
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run_policy_test 'config1' 'test2' $PROGRAM_RETVAL_FAILURE
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run_policy_test 'config1' 'test3' $PROGRAM_RETVAL_FAILURE
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run_policy_test 'config1' 'test4' $PROGRAM_RETVAL_FAILURE
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run_policy_test 'config1' 'test5' $PROGRAM_RETVAL_FAILURE
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run_policy_test 'config2' 'test6' $PROGRAM_RETVAL_GOOD
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run_custom_policy_test 'config1' 'test1' $PROGRAM_RETVAL_GOOD
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run_custom_policy_test 'config1' 'test2' $PROGRAM_RETVAL_FAILURE
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run_custom_policy_test 'config1' 'test3' $PROGRAM_RETVAL_FAILURE
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run_custom_policy_test 'config1' 'test4' $PROGRAM_RETVAL_FAILURE
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run_custom_policy_test 'config1' 'test5' $PROGRAM_RETVAL_FAILURE
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run_custom_policy_test 'config2' 'test6' $PROGRAM_RETVAL_GOOD
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# Passing test with host key certificate and CA key certificates.
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run_policy_test 'config3' 'test7' $PROGRAM_RETVAL_GOOD
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run_custom_policy_test 'config3' 'test7' $PROGRAM_RETVAL_GOOD
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# Failing test with host key certificate and non-compliant CA key length.
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run_policy_test 'config3' 'test8' $PROGRAM_RETVAL_FAILURE
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run_custom_policy_test 'config3' 'test8' $PROGRAM_RETVAL_FAILURE
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# Failing test with non-compliant host key certificate and CA key certificate.
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run_policy_test 'config3' 'test9' $PROGRAM_RETVAL_FAILURE
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run_custom_policy_test 'config3' 'test9' $PROGRAM_RETVAL_FAILURE
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# Failing test with non-compliant host key certificate and non-compliant CA key certificate.
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run_policy_test 'config3' 'test10' $PROGRAM_RETVAL_FAILURE
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run_custom_policy_test 'config3' 'test10' $PROGRAM_RETVAL_FAILURE
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# Passing test with host key size check.
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run_policy_test 'config2' 'test11' $PROGRAM_RETVAL_GOOD
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run_custom_policy_test 'config2' 'test11' $PROGRAM_RETVAL_GOOD
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# Failing test with non-compliant host key size check.
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run_policy_test 'config2' 'test12' $PROGRAM_RETVAL_FAILURE
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run_custom_policy_test 'config2' 'test12' $PROGRAM_RETVAL_FAILURE
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# Passing test with DH modulus test.
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run_policy_test 'config2' 'test13' $PROGRAM_RETVAL_GOOD
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run_custom_policy_test 'config2' 'test13' $PROGRAM_RETVAL_GOOD
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# Failing test with DH modulus test.
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run_policy_test 'config2' 'test14' $PROGRAM_RETVAL_FAILURE
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run_custom_policy_test 'config2' 'test14' $PROGRAM_RETVAL_FAILURE
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# Passing test for built-in OpenSSH 8.0p1 server policy.
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run_builtin_policy_test "Hardened OpenSSH Server v8.0 (version 1)" "8.0p1" "test1" "-o HostKeyAlgorithms=ssh-ed25519 -o KexAlgorithms=curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha256 -o Ciphers=chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr -o MACs=hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,umac-128-etm@openssh.com" $PROGRAM_RETVAL_GOOD
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# Failing test for built-in OpenSSH 8.0p1 server policy (MACs not hardened).
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run_builtin_policy_test "Hardened OpenSSH Server v8.0 (version 1)" "8.0p1" "test2" "-o HostKeyAlgorithms=ssh-ed25519 -o KexAlgorithms=curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha256 -o Ciphers=chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr" $PROGRAM_RETVAL_FAILURE
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# The test functions above will terminate the script on failure, so if we reached here,
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@ -36,9 +36,6 @@ python_requires = >=3.5,<4
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[options.packages.find]
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where = src
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[options.package_data]
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ssh_audit = policies/*
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[options.entry_points]
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console_scripts =
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ssh-audit = ssh_audit.ssh_audit:main
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@ -1,24 +0,0 @@
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#
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# Official policy for hardened OpenSSH v7.7.
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#
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name = "Hardened OpenSSH v7.7"
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version = 1
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# Group exchange DH modulus sizes.
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dh_modulus_size_diffie-hellman-group-exchange-sha256 = 2048
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# The host key types that must match exactly (order matters).
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host keys = ssh-ed25519
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# Host key types that may optionally appear.
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optional host keys = ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512-cert-v01@openssh.com
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# The key exchange algorithms that must match exactly (order matters).
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key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256
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# The ciphers that must match exactly (order matters).
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ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
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# The MACs that must match exactly (order matters).
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macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
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@ -1,24 +0,0 @@
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#
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# Official policy for hardened OpenSSH v7.8.
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#
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name = "Hardened OpenSSH v7.8"
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version = 1
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# Group exchange DH modulus sizes.
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dh_modulus_size_diffie-hellman-group-exchange-sha256 = 2048
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# The host key types that must match exactly (order matters).
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host keys = ssh-ed25519
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# Host key types that may optionally appear.
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optional host keys = ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512-cert-v01@openssh.com
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# The key exchange algorithms that must match exactly (order matters).
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key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256
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# The ciphers that must match exactly (order matters).
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ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
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# The MACs that must match exactly (order matters).
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macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
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@ -1,24 +0,0 @@
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#
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# Official policy for hardened OpenSSH v7.9.
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#
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name = "Hardened OpenSSH v7.9"
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version = 1
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# Group exchange DH modulus sizes.
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dh_modulus_size_diffie-hellman-group-exchange-sha256 = 2048
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# The host key types that must match exactly (order matters).
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host keys = ssh-ed25519
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# Host key types that may optionally appear.
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optional host keys = ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512-cert-v01@openssh.com
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# The key exchange algorithms that must match exactly (order matters).
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key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256
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# The ciphers that must match exactly (order matters).
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ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
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# The MACs that must match exactly (order matters).
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macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
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@ -1,24 +0,0 @@
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#
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# Official policy for hardened OpenSSH v8.0.
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#
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name = "Hardened OpenSSH v8.0"
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version = 1
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# Group exchange DH modulus sizes.
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dh_modulus_size_diffie-hellman-group-exchange-sha256 = 2048
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# The host key types that must match exactly (order matters).
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host keys = ssh-ed25519
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# Host key types that may optionally appear.
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optional host keys = ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512-cert-v01@openssh.com
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# The key exchange algorithms that must match exactly (order matters).
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key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256
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# The ciphers that must match exactly (order matters).
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ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
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# The MACs that must match exactly (order matters).
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macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
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@ -1,24 +0,0 @@
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#
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# Official policy for hardened OpenSSH v8.1.
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#
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name = "Hardened OpenSSH v8.1"
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version = 1
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# Group exchange DH modulus sizes.
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dh_modulus_size_diffie-hellman-group-exchange-sha256 = 2048
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# The host key types that must match exactly (order matters).
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host keys = ssh-ed25519
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# Host key types that may optionally appear.
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optional host keys = sk-ssh-ed25519@openssh.com, ssh-ed25519-cert-v01@openssh.com, sk-ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512-cert-v01@openssh.com
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# The key exchange algorithms that must match exactly (order matters).
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key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256
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# The ciphers that must match exactly (order matters).
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ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
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# The MACs that must match exactly (order matters).
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macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
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@ -1,28 +0,0 @@
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#
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# Official policy for hardened OpenSSH v8.2.
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#
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name = "Hardened OpenSSH v8.2"
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version = 1
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# RSA host key sizes.
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hostkey_size_rsa-sha2-256 = 4096
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hostkey_size_rsa-sha2-512 = 4096
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# Group exchange DH modulus sizes.
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dh_modulus_size_diffie-hellman-group-exchange-sha256 = 2048
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# The host key types that must match exactly (order matters).
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host keys = rsa-sha2-512, rsa-sha2-256, ssh-ed25519
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# Host key types that may optionally appear.
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optional host keys = sk-ssh-ed25519@openssh.com, ssh-ed25519-cert-v01@openssh.com, sk-ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512-cert-v01@openssh.com
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# The key exchange algorithms that must match exactly (order matters).
|
||||
key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256
|
||||
|
||||
# The ciphers that must match exactly (order matters).
|
||||
ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
|
||||
|
||||
# The MACs that must match exactly (order matters).
|
||||
macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
|
||||
@ -1,28 +0,0 @@
|
||||
#
|
||||
# Official policy for hardened OpenSSH v8.3.
|
||||
#
|
||||
|
||||
name = "Hardened OpenSSH v8.3"
|
||||
version = 1
|
||||
|
||||
# RSA host key sizes.
|
||||
hostkey_size_rsa-sha2-256 = 4096
|
||||
hostkey_size_rsa-sha2-512 = 4096
|
||||
|
||||
# Group exchange DH modulus sizes.
|
||||
dh_modulus_size_diffie-hellman-group-exchange-sha256 = 2048
|
||||
|
||||
# The host key types that must match exactly (order matters).
|
||||
host keys = rsa-sha2-512, rsa-sha2-256, ssh-ed25519
|
||||
|
||||
# Host key types that may optionally appear.
|
||||
optional host keys = sk-ssh-ed25519@openssh.com, ssh-ed25519-cert-v01@openssh.com, sk-ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512-cert-v01@openssh.com
|
||||
|
||||
# The key exchange algorithms that must match exactly (order matters).
|
||||
key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256
|
||||
|
||||
# The ciphers that must match exactly (order matters).
|
||||
ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
|
||||
|
||||
# The MACs that must match exactly (order matters).
|
||||
macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
|
||||
@ -1,28 +0,0 @@
|
||||
#
|
||||
# Official policy for hardened OpenSSH v8.4.
|
||||
#
|
||||
|
||||
name = "Hardened OpenSSH v8.4"
|
||||
version = 1
|
||||
|
||||
# RSA host key sizes.
|
||||
hostkey_size_rsa-sha2-256 = 4096
|
||||
hostkey_size_rsa-sha2-512 = 4096
|
||||
|
||||
# Group exchange DH modulus sizes.
|
||||
dh_modulus_size_diffie-hellman-group-exchange-sha256 = 2048
|
||||
|
||||
# The host key types that must match exactly (order matters).
|
||||
host keys = rsa-sha2-512, rsa-sha2-256, ssh-ed25519
|
||||
|
||||
# Host key types that may optionally appear.
|
||||
optional host keys = sk-ssh-ed25519@openssh.com, ssh-ed25519-cert-v01@openssh.com, sk-ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512-cert-v01@openssh.com
|
||||
|
||||
# The key exchange algorithms that must match exactly (order matters).
|
||||
key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256
|
||||
|
||||
# The ciphers that must match exactly (order matters).
|
||||
ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
|
||||
|
||||
# The MACs that must match exactly (order matters).
|
||||
macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
|
||||
@ -1,19 +0,0 @@
|
||||
#
|
||||
# Official policy for hardened OpenSSH on Ubuntu 16.04 LTS.
|
||||
#
|
||||
|
||||
client policy = true
|
||||
name = "Hardened Ubuntu Client 16.04 LTS"
|
||||
version = 1
|
||||
|
||||
# The host key types that must match exactly (order matters).
|
||||
host keys = ssh-ed25519, ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256, rsa-sha2-512, ssh-rsa-cert-v01@openssh.com
|
||||
|
||||
# The key exchange algorithms that must match exactly (order matters).
|
||||
key exchanges = curve25519-sha256@libssh.org, diffie-hellman-group-exchange-sha256, ext-info-c
|
||||
|
||||
# The ciphers that must match exactly (order matters).
|
||||
ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
|
||||
|
||||
# The MACs that must match exactly (order matters).
|
||||
macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
|
||||
@ -1,19 +0,0 @@
|
||||
#
|
||||
# Official policy for hardened OpenSSH on Ubuntu 18.04 LTS.
|
||||
#
|
||||
|
||||
client policy = true
|
||||
name = "Hardened Ubuntu Client 18.04 LTS"
|
||||
version = 1
|
||||
|
||||
# The host key types that must match exactly (order matters).
|
||||
host keys = ssh-ed25519, ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256, rsa-sha2-512, ssh-rsa-cert-v01@openssh.com
|
||||
|
||||
# The key exchange algorithms that must match exactly (order matters).
|
||||
key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256, ext-info-c
|
||||
|
||||
# The ciphers that must match exactly (order matters).
|
||||
ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
|
||||
|
||||
# The MACs that must match exactly (order matters).
|
||||
macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
|
||||
@ -1,19 +0,0 @@
|
||||
#
|
||||
# Official policy for hardened OpenSSH on Ubuntu 20.04 LTS.
|
||||
#
|
||||
|
||||
client policy = true
|
||||
name = "Hardened Ubuntu Client 20.04 LTS"
|
||||
version = 1
|
||||
|
||||
# The host key types that must match exactly (order matters).
|
||||
host keys = ssh-ed25519, ssh-ed25519-cert-v01@openssh.com, sk-ssh-ed25519@openssh.com, sk-ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512, rsa-sha2-512-cert-v01@openssh.com, ssh-rsa-cert-v01@openssh.com
|
||||
|
||||
# The key exchange algorithms that must match exactly (order matters).
|
||||
key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256, ext-info-c
|
||||
|
||||
# The ciphers that must match exactly (order matters).
|
||||
ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
|
||||
|
||||
# The MACs that must match exactly (order matters).
|
||||
macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
|
||||
@ -1,24 +0,0 @@
|
||||
#
|
||||
# Official policy for hardened OpenSSH on Ubuntu Server 16.04 LTS.
|
||||
#
|
||||
|
||||
name = "Hardened Ubuntu Server 16.04 LTS"
|
||||
version = 1
|
||||
|
||||
# Group exchange DH modulus sizes.
|
||||
dh_modulus_size_diffie-hellman-group-exchange-sha256 = 2048
|
||||
|
||||
# The host key types that must match exactly (order matters).
|
||||
host keys = ssh-ed25519
|
||||
|
||||
# Host key types that may optionally appear.
|
||||
optional host keys = ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512-cert-v01@openssh.com
|
||||
|
||||
# The key exchange algorithms that must match exactly (order matters).
|
||||
key exchanges = curve25519-sha256@libssh.org, diffie-hellman-group-exchange-sha256
|
||||
|
||||
# The ciphers that must match exactly (order matters).
|
||||
ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
|
||||
|
||||
# The MACs that must match exactly (order matters).
|
||||
macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
|
||||
@ -1,24 +0,0 @@
|
||||
#
|
||||
# Official policy for hardened OpenSSH on Ubuntu Server 18.04 LTS.
|
||||
#
|
||||
|
||||
name = "Hardened Ubuntu Server 18.04 LTS"
|
||||
version = 1
|
||||
|
||||
# Group exchange DH modulus sizes.
|
||||
dh_modulus_size_diffie-hellman-group-exchange-sha256 = 2048
|
||||
|
||||
# The host key types that must match exactly (order matters).
|
||||
host keys = ssh-ed25519
|
||||
|
||||
# Host key types that may optionally appear.
|
||||
optional host keys = ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512-cert-v01@openssh.com
|
||||
|
||||
# The key exchange algorithms that must match exactly (order matters).
|
||||
key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256
|
||||
|
||||
# The ciphers that must match exactly (order matters).
|
||||
ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
|
||||
|
||||
# The MACs that must match exactly (order matters).
|
||||
macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
|
||||
@ -1,28 +0,0 @@
|
||||
#
|
||||
# Official policy for hardened OpenSSH on Ubuntu Server 20.04 LTS.
|
||||
#
|
||||
|
||||
name = "Hardened Ubuntu Server 20.04 LTS"
|
||||
version = 1
|
||||
|
||||
# RSA host key sizes.
|
||||
hostkey_size_rsa-sha2-256 = 4096
|
||||
hostkey_size_rsa-sha2-512 = 4096
|
||||
|
||||
# Group exchange DH modulus sizes.
|
||||
dh_modulus_size_diffie-hellman-group-exchange-sha256 = 2048
|
||||
|
||||
# The host key types that must match exactly (order matters).
|
||||
host keys = rsa-sha2-512, rsa-sha2-256, ssh-ed25519
|
||||
|
||||
# Host key types that may optionally appear.
|
||||
optional host keys = sk-ssh-ed25519@openssh.com, ssh-ed25519-cert-v01@openssh.com, sk-ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512-cert-v01@openssh.com
|
||||
|
||||
# The key exchange algorithms that must match exactly (order matters).
|
||||
key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256
|
||||
|
||||
# The ciphers that must match exactly (order matters).
|
||||
ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
|
||||
|
||||
# The MACs that must match exactly (order matters).
|
||||
macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com
|
||||
@ -22,7 +22,7 @@
|
||||
THE SOFTWARE.
|
||||
"""
|
||||
from typing import Dict, List, Tuple
|
||||
from typing import Optional, Any
|
||||
from typing import Optional, Any, Union, cast
|
||||
from datetime import date
|
||||
|
||||
from ssh_audit.ssh2_kex import SSH2_Kex # pylint: disable=unused-import
|
||||
@ -32,7 +32,49 @@ from ssh_audit.banner import Banner
|
||||
# Validates policy files and performs policy testing
|
||||
class Policy:
|
||||
|
||||
def __init__(self, policy_file: Optional[str] = None, policy_data: Optional[str] = None) -> None:
|
||||
# Each field maps directly to a private member variable of the Policy class.
|
||||
BUILTIN_POLICIES = {
|
||||
|
||||
# Ubuntu Server policies
|
||||
|
||||
'Hardened Ubuntu Server 16.04 LTS (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['ssh-ed25519'], 'optional_host_keys': ['ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256-cert-v01@openssh.com', 'rsa-sha2-512-cert-v01@openssh.com'], 'kex': ['curve25519-sha256@libssh.org', 'diffie-hellman-group-exchange-sha256'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': None, 'cakey_sizes': None, 'dh_modulus_sizes': {'diffie-hellman-group-exchange-sha256': 2048}, 'server_policy': True},
|
||||
|
||||
'Hardened Ubuntu Server 18.04 LTS (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['ssh-ed25519'], 'optional_host_keys': ['ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256-cert-v01@openssh.com', 'rsa-sha2-512-cert-v01@openssh.com'], 'kex': ['curve25519-sha256', 'curve25519-sha256@libssh.org', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha256'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': None, 'cakey_sizes': None, 'dh_modulus_sizes': {'diffie-hellman-group-exchange-sha256': 2048}, 'server_policy': True},
|
||||
|
||||
'Hardened Ubuntu Server 20.04 LTS (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['rsa-sha2-512', 'rsa-sha2-256', 'ssh-ed25519'], 'optional_host_keys': ['sk-ssh-ed25519@openssh.com', 'ssh-ed25519-cert-v01@openssh.com', 'sk-ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256-cert-v01@openssh.com', 'rsa-sha2-512-cert-v01@openssh.com'], 'kex': ['curve25519-sha256', 'curve25519-sha256@libssh.org', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha256'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': {'rsa-sha2-256': 4096, 'rsa-sha2-512': 4096}, 'cakey_sizes': None, 'dh_modulus_sizes': {'diffie-hellman-group-exchange-sha256': 2048}, 'server_policy': True},
|
||||
|
||||
|
||||
# Generic OpenSSH Server policies
|
||||
|
||||
'Hardened OpenSSH Server v7.7 (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['ssh-ed25519'], 'optional_host_keys': ['ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256-cert-v01@openssh.com', 'rsa-sha2-512-cert-v01@openssh.com'], 'kex': ['curve25519-sha256', 'curve25519-sha256@libssh.org', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha256'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': None, 'cakey_sizes': None, 'dh_modulus_sizes': {'diffie-hellman-group-exchange-sha256': 2048}, 'server_policy': True},
|
||||
|
||||
'Hardened OpenSSH Server v7.8 (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['ssh-ed25519'], 'optional_host_keys': ['ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256-cert-v01@openssh.com', 'rsa-sha2-512-cert-v01@openssh.com'], 'kex': ['curve25519-sha256', 'curve25519-sha256@libssh.org', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha256'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': None, 'cakey_sizes': None, 'dh_modulus_sizes': {'diffie-hellman-group-exchange-sha256': 2048}, 'server_policy': True},
|
||||
|
||||
'Hardened OpenSSH Server v7.9 (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['ssh-ed25519'], 'optional_host_keys': ['ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256-cert-v01@openssh.com', 'rsa-sha2-512-cert-v01@openssh.com'], 'kex': ['curve25519-sha256', 'curve25519-sha256@libssh.org', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha256'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': None, 'cakey_sizes': None, 'dh_modulus_sizes': {'diffie-hellman-group-exchange-sha256': 2048}, 'server_policy': True},
|
||||
|
||||
'Hardened OpenSSH Server v8.0 (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['ssh-ed25519'], 'optional_host_keys': ['ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256-cert-v01@openssh.com', 'rsa-sha2-512-cert-v01@openssh.com'], 'kex': ['curve25519-sha256', 'curve25519-sha256@libssh.org', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha256'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': None, 'cakey_sizes': None, 'dh_modulus_sizes': {'diffie-hellman-group-exchange-sha256': 2048}, 'server_policy': True},
|
||||
|
||||
'Hardened OpenSSH Server v8.1 (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['ssh-ed25519'], 'optional_host_keys': ['sk-ssh-ed25519@openssh.com', 'ssh-ed25519-cert-v01@openssh.com', 'sk-ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256-cert-v01@openssh.com', 'rsa-sha2-512-cert-v01@openssh.com'], 'kex': ['curve25519-sha256', 'curve25519-sha256@libssh.org', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha256'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': None, 'cakey_sizes': None, 'dh_modulus_sizes': {'diffie-hellman-group-exchange-sha256': 2048}, 'server_policy': True},
|
||||
|
||||
'Hardened OpenSSH Server v8.2 (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['rsa-sha2-512', 'rsa-sha2-256', 'ssh-ed25519'], 'optional_host_keys': ['sk-ssh-ed25519@openssh.com', 'ssh-ed25519-cert-v01@openssh.com', 'sk-ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256-cert-v01@openssh.com', 'rsa-sha2-512-cert-v01@openssh.com'], 'kex': ['curve25519-sha256', 'curve25519-sha256@libssh.org', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha256'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': {'rsa-sha2-256': 4096, 'rsa-sha2-512': 4096}, 'cakey_sizes': None, 'dh_modulus_sizes': {'diffie-hellman-group-exchange-sha256': 2048}, 'server_policy': True},
|
||||
|
||||
'Hardened OpenSSH Server v8.3 (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['rsa-sha2-512', 'rsa-sha2-256', 'ssh-ed25519'], 'optional_host_keys': ['sk-ssh-ed25519@openssh.com', 'ssh-ed25519-cert-v01@openssh.com', 'sk-ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256-cert-v01@openssh.com', 'rsa-sha2-512-cert-v01@openssh.com'], 'kex': ['curve25519-sha256', 'curve25519-sha256@libssh.org', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha256'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': {'rsa-sha2-256': 4096, 'rsa-sha2-512': 4096}, 'cakey_sizes': None, 'dh_modulus_sizes': {'diffie-hellman-group-exchange-sha256': 2048}, 'server_policy': True},
|
||||
|
||||
'Hardened OpenSSH Server v8.4 (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['rsa-sha2-512', 'rsa-sha2-256', 'ssh-ed25519'], 'optional_host_keys': ['sk-ssh-ed25519@openssh.com', 'ssh-ed25519-cert-v01@openssh.com', 'sk-ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256-cert-v01@openssh.com', 'rsa-sha2-512-cert-v01@openssh.com'], 'kex': ['curve25519-sha256', 'curve25519-sha256@libssh.org', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha256'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': {'rsa-sha2-256': 4096, 'rsa-sha2-512': 4096}, 'cakey_sizes': None, 'dh_modulus_sizes': {'diffie-hellman-group-exchange-sha256': 2048}, 'server_policy': True},
|
||||
|
||||
|
||||
# Ubuntu Client policies
|
||||
|
||||
'Hardened Ubuntu Client 16.04 LTS (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['ssh-ed25519', 'ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256', 'rsa-sha2-512', 'ssh-rsa-cert-v01@openssh.com'], 'optional_host_keys': None, 'kex': ['curve25519-sha256@libssh.org', 'diffie-hellman-group-exchange-sha256', 'ext-info-c'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': None, 'cakey_sizes': None, 'dh_modulus_sizes': None, 'server_policy': False},
|
||||
|
||||
'Hardened Ubuntu Client 18.04 LTS (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['ssh-ed25519', 'ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256', 'rsa-sha2-512', 'ssh-rsa-cert-v01@openssh.com'], 'optional_host_keys': None, 'kex': ['curve25519-sha256', 'curve25519-sha256@libssh.org', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha256', 'ext-info-c'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': None, 'cakey_sizes': None, 'dh_modulus_sizes': None, 'server_policy': False},
|
||||
|
||||
'Hardened Ubuntu Client 20.04 LTS (version 1)': {'version': '1', 'banner': None, 'compressions': None, 'host_keys': ['ssh-ed25519', 'ssh-ed25519-cert-v01@openssh.com', 'sk-ssh-ed25519@openssh.com', 'sk-ssh-ed25519-cert-v01@openssh.com', 'rsa-sha2-256', 'rsa-sha2-256-cert-v01@openssh.com', 'rsa-sha2-512', 'rsa-sha2-512-cert-v01@openssh.com', 'ssh-rsa-cert-v01@openssh.com'], 'optional_host_keys': None, 'kex': ['curve25519-sha256', 'curve25519-sha256@libssh.org', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha256', 'ext-info-c'], 'ciphers': ['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes128-gcm@openssh.com', 'aes256-ctr', 'aes192-ctr', 'aes128-ctr'], 'macs': ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com'], 'hostkey_sizes': None, 'cakey_sizes': None, 'dh_modulus_sizes': None, 'server_policy': False},
|
||||
|
||||
} # type: Dict[str, Dict[str, Union[Optional[str], Optional[List[str]], bool, Dict[str, int]]]]
|
||||
|
||||
|
||||
def __init__(self, policy_file: Optional[str] = None, policy_data: Optional[str] = None, manual_load: bool = False) -> None:
|
||||
self._name = None # type: Optional[str]
|
||||
self._version = None # type: Optional[str]
|
||||
self._banner = None # type: Optional[str]
|
||||
@ -47,10 +89,22 @@ class Policy:
|
||||
self._dh_modulus_sizes = None # type: Optional[Dict[str, int]]
|
||||
self._server_policy = True
|
||||
|
||||
if (policy_file is None) and (policy_data is None):
|
||||
raise RuntimeError('policy_file and policy_data must not both be None.')
|
||||
elif (policy_file is not None) and (policy_data is not None):
|
||||
raise RuntimeError('policy_file and policy_data must not both be specified.')
|
||||
self._name_and_version = '' # type: str
|
||||
|
||||
# Ensure that only one mode was specified.
|
||||
num_modes = 0
|
||||
if policy_file is not None:
|
||||
num_modes += 1
|
||||
if policy_data is not None:
|
||||
num_modes += 1
|
||||
if manual_load is True:
|
||||
num_modes += 1
|
||||
|
||||
if num_modes != 1:
|
||||
raise RuntimeError('Exactly one of the following can be specified only: policy_file, policy_data, or manual_load')
|
||||
|
||||
if manual_load:
|
||||
return
|
||||
|
||||
if policy_file is not None:
|
||||
with open(policy_file, "r") as f:
|
||||
@ -142,6 +196,8 @@ class Policy:
|
||||
if self._version is None:
|
||||
raise ValueError('The policy does not have a version field.')
|
||||
|
||||
self._name_and_version = "%s (version %s)" % (self._name, self._version)
|
||||
|
||||
|
||||
@staticmethod
|
||||
def _append_error(errors: List[Any], mismatched_field: str, expected_required: Optional[List[str]], expected_optional: Optional[List[str]], actual: List[str]) -> None:
|
||||
@ -339,7 +395,7 @@ macs = %s
|
||||
|
||||
def get_name_and_version(self) -> str:
|
||||
'''Returns a string of this Policy's name and version.'''
|
||||
return '%s (version %s)' % (self._name, self._version)
|
||||
return self._name_and_version
|
||||
|
||||
|
||||
def is_server_policy(self) -> bool:
|
||||
@ -347,6 +403,50 @@ macs = %s
|
||||
return self._server_policy
|
||||
|
||||
|
||||
@staticmethod
|
||||
def list_builtin_policies() -> Tuple[List[str], List[str]]:
|
||||
'''Returns two lists: a list of names of built-in server policies, and a list of names of built-in client policies, respectively.'''
|
||||
server_policy_names = []
|
||||
client_policy_names = []
|
||||
|
||||
for policy_name in Policy.BUILTIN_POLICIES:
|
||||
if Policy.BUILTIN_POLICIES[policy_name]['server_policy']:
|
||||
server_policy_names.append(policy_name)
|
||||
else:
|
||||
client_policy_names.append(policy_name)
|
||||
|
||||
server_policy_names.sort()
|
||||
client_policy_names.sort()
|
||||
return server_policy_names, client_policy_names
|
||||
|
||||
|
||||
@staticmethod
|
||||
def load_builtin_policy(policy_name: str) -> Optional['Policy']:
|
||||
'''Returns a Policy with the specified built-in policy name loaded, or None if no policy of that name exists.'''
|
||||
p = None
|
||||
if policy_name in Policy.BUILTIN_POLICIES:
|
||||
policy_struct = Policy.BUILTIN_POLICIES[policy_name]
|
||||
p = Policy(manual_load=True)
|
||||
policy_name_without_version = policy_name[0:policy_name.rfind(' (')]
|
||||
p._name = policy_name_without_version # pylint: disable=protected-access
|
||||
p._version = cast(str, policy_struct['version']) # pylint: disable=protected-access
|
||||
p._banner = cast(Optional[str], policy_struct['banner']) # pylint: disable=protected-access
|
||||
p._compressions = cast(Optional[List[str]], policy_struct['compressions']) # pylint: disable=protected-access
|
||||
p._host_keys = cast(Optional[List[str]], policy_struct['host_keys']) # pylint: disable=protected-access
|
||||
p._optional_host_keys = cast(Optional[List[str]], policy_struct['optional_host_keys']) # pylint: disable=protected-access
|
||||
p._kex = cast(Optional[List[str]], policy_struct['kex']) # pylint: disable=protected-access
|
||||
p._ciphers = cast(Optional[List[str]], policy_struct['ciphers']) # pylint: disable=protected-access
|
||||
p._macs = cast(Optional[List[str]], policy_struct['macs']) # pylint: disable=protected-access
|
||||
p._hostkey_sizes = cast(Optional[Dict[str, int]], policy_struct['hostkey_sizes']) # pylint: disable=protected-access
|
||||
p._cakey_sizes = cast(Optional[Dict[str, int]], policy_struct['cakey_sizes']) # pylint: disable=protected-access
|
||||
p._dh_modulus_sizes = cast(Optional[Dict[str, int]], policy_struct['dh_modulus_sizes']) # pylint: disable=protected-access
|
||||
p._server_policy = cast(bool, policy_struct['server_policy']) # pylint: disable=protected-access
|
||||
|
||||
p._name_and_version = "%s (version %s)" % (p._name, p._version) # pylint: disable=protected-access
|
||||
|
||||
return p
|
||||
|
||||
|
||||
@staticmethod
|
||||
def _normalize_error_field(field: List[str]) -> Any:
|
||||
'''If field is an array with a string parsable as an integer, return that integer. Otherwise, return the field unmodified.'''
|
||||
@ -367,9 +467,14 @@ macs = %s
|
||||
banner = undefined
|
||||
compressions_str = undefined
|
||||
host_keys_str = undefined
|
||||
optional_host_keys_str = undefined
|
||||
kex_str = undefined
|
||||
ciphers_str = undefined
|
||||
macs_str = undefined
|
||||
hostkey_sizes_str = undefined
|
||||
cakey_sizes_str = undefined
|
||||
dh_modulus_sizes_str = undefined
|
||||
|
||||
|
||||
if self._name is not None:
|
||||
name = '[%s]' % self._name
|
||||
@ -382,11 +487,19 @@ macs = %s
|
||||
compressions_str = ', '.join(self._compressions)
|
||||
if self._host_keys is not None:
|
||||
host_keys_str = ', '.join(self._host_keys)
|
||||
if self._optional_host_keys is not None:
|
||||
optional_host_keys_str = ', '.join(self._optional_host_keys)
|
||||
if self._kex is not None:
|
||||
kex_str = ', '.join(self._kex)
|
||||
if self._ciphers is not None:
|
||||
ciphers_str = ', '.join(self._ciphers)
|
||||
if self._macs is not None:
|
||||
macs_str = ', '.join(self._macs)
|
||||
if self._hostkey_sizes is not None:
|
||||
hostkey_sizes_str = str(self._hostkey_sizes)
|
||||
if self._cakey_sizes is not None:
|
||||
cakey_sizes_str = str(self._cakey_sizes)
|
||||
if self._dh_modulus_sizes is not None:
|
||||
dh_modulus_sizes_str = str(self._dh_modulus_sizes)
|
||||
|
||||
return "Name: %s\nVersion: %s\nBanner: %s\nCompressions: %s\nHost Keys: %s\nKey Exchanges: %s\nCiphers: %s\nMACs: %s" % (name, version, banner, compressions_str, host_keys_str, kex_str, ciphers_str, macs_str)
|
||||
return "Name: %s\nVersion: %s\nBanner: %s\nCompressions: %s\nHost Keys: %s\nOptional Host Keys: %s\nKey Exchanges: %s\nCiphers: %s\nMACs: %s\nHost Key Sizes: %s\nCA Key Sizes: %s\nDH Modulus Sizes: %s\nServer Policy: %r" % (name, version, banner, compressions_str, host_keys_str, optional_host_keys_str, kex_str, ciphers_str, macs_str, hostkey_sizes_str, cakey_sizes_str, dh_modulus_sizes_str, self._server_policy)
|
||||
|
||||
@ -33,7 +33,7 @@ import traceback
|
||||
from typing import Dict, List, Set, Sequence, Tuple, Iterable # noqa: F401
|
||||
from typing import Callable, Optional, Union, Any # noqa: F401
|
||||
|
||||
from ssh_audit.globals import GITHUB_ISSUES_URL, VERSION
|
||||
from ssh_audit.globals import VERSION
|
||||
from ssh_audit.algorithm import Algorithm
|
||||
from ssh_audit.algorithms import Algorithms
|
||||
from ssh_audit.auditconf import AuditConf
|
||||
@ -508,55 +508,22 @@ def evaluate_policy(aconf: AuditConf, banner: Optional['Banner'], client_host: O
|
||||
|
||||
|
||||
def list_policies() -> None:
|
||||
'''Prints a list of server & client policies.'''
|
||||
|
||||
# Get a list of all the files in the policies sub-directory, relative to the path of this script.
|
||||
installed_dir = os.path.dirname(os.path.abspath(__file__))
|
||||
policies_dir = os.path.join(installed_dir, 'policies')
|
||||
server_policy_names, client_policy_names = Policy.list_builtin_policies()
|
||||
|
||||
# If the path is not a directory, print a useful error and exit.
|
||||
if not os.path.isdir(policies_dir):
|
||||
print("Error: could not find policies directory. Please report this full output to <%s>:" % GITHUB_ISSUES_URL)
|
||||
print("\nsys.argv[0]: %s" % sys.argv[0])
|
||||
print("__file__: %s" % __file__)
|
||||
print("policies_dir: %s" % policies_dir)
|
||||
sys.exit(exitcodes.UNKNOWN_ERROR)
|
||||
|
||||
# Get a list of all the files in the policies sub-directory.
|
||||
files = []
|
||||
for f in os.listdir(policies_dir):
|
||||
files.append(f)
|
||||
|
||||
files.sort() # Now the files will be in order, like 'ubuntu_client_16_04.txt', 'ubuntu_client_18_04.txt', 'ubuntu_client_20_04.txt', ...
|
||||
|
||||
server_policies_summary = []
|
||||
client_policies_summary = []
|
||||
for f in files:
|
||||
|
||||
# Load each policy, and generate a short summary from its name and absolute file path.
|
||||
policy_file = os.path.join(policies_dir, f)
|
||||
policy = Policy(policy_file=policy_file)
|
||||
policy_summary = "Name: %s\nPolicy path: %s" % (policy.get_name_and_version(), policy_file)
|
||||
|
||||
# We will print the server policies separately from thee client policies...
|
||||
if policy.is_server_policy():
|
||||
server_policies_summary.append(policy_summary)
|
||||
else:
|
||||
client_policies_summary.append(policy_summary)
|
||||
|
||||
if len(server_policies_summary) > 0:
|
||||
if len(server_policy_names) > 0:
|
||||
out.head('\nServer policies:\n')
|
||||
print("\n\n".join(server_policies_summary))
|
||||
print()
|
||||
print(" * \"%s\"" % "\"\n * \"".join(server_policy_names))
|
||||
|
||||
if len(client_policies_summary) > 0:
|
||||
if len(client_policy_names) > 0:
|
||||
out.head('\nClient policies:\n')
|
||||
print("\n\n".join(client_policies_summary))
|
||||
print()
|
||||
print(" * \"%s\"" % "\"\n * \"".join(client_policy_names))
|
||||
|
||||
if len(server_policies_summary) == 0 and len(client_policies_summary) == 0:
|
||||
print("Error: no built-in policies found in %s." % policies_dir)
|
||||
if len(server_policy_names) == 0 and len(client_policy_names) == 0:
|
||||
print("Error: no built-in policies found!")
|
||||
else:
|
||||
print("\nHint: Use -P and provide the path to a policy to run a policy scan.\n")
|
||||
print("\nHint: Use -P and provide the full name of a policy to run a policy scan with.\n")
|
||||
|
||||
|
||||
def make_policy(aconf: AuditConf, banner: Optional['Banner'], kex: Optional['SSH2_Kex'], client_host: Optional[str]) -> None:
|
||||
@ -685,11 +652,15 @@ def process_commandline(args: List[str], usage_cb: Callable[..., None]) -> 'Audi
|
||||
|
||||
# If a policy file was provided, validate it.
|
||||
if (aconf.policy_file is not None) and (aconf.make_policy is False):
|
||||
try:
|
||||
aconf.policy = Policy(policy_file=aconf.policy_file)
|
||||
except Exception as e:
|
||||
print("Error while loading policy file: %s: %s" % (str(e), traceback.format_exc()))
|
||||
sys.exit(exitcodes.UNKNOWN_ERROR)
|
||||
|
||||
# First, see if this is a built-in policy name. If not, assume a file path was provided, and try to load it from disk.
|
||||
aconf.policy = Policy.load_builtin_policy(aconf.policy_file)
|
||||
if aconf.policy is None:
|
||||
try:
|
||||
aconf.policy = Policy(policy_file=aconf.policy_file)
|
||||
except Exception as e:
|
||||
print("Error while loading policy file: %s: %s" % (str(e), traceback.format_exc()))
|
||||
sys.exit(exitcodes.UNKNOWN_ERROR)
|
||||
|
||||
# If the user wants to do a client audit, but provided a server policy, terminate.
|
||||
if aconf.client_audit and aconf.policy.is_server_policy():
|
||||
|
||||
31
ssh-audit.1
31
ssh-audit.1
@ -1,4 +1,4 @@
|
||||
.TH SSH-AUDIT 1 "July 16, 2020"
|
||||
.TH SSH-AUDIT 1 "October 19, 2020"
|
||||
.SH NAME
|
||||
\fBssh-audit\fP \- SSH server & client configuration auditor
|
||||
.SH SYNOPSIS
|
||||
@ -59,7 +59,7 @@ Specify the minimum output level. Default is info.
|
||||
.TP
|
||||
.B -L, \-\-list-policies
|
||||
.br
|
||||
List all official, built-in policies for common systems. Their file paths can then be provided using -P/--policy=<path/to/policy.txt>.
|
||||
List all official, built-in policies for common systems. Their full names can then be passed to -P/--policy.
|
||||
|
||||
.TP
|
||||
.B \-\-lookup=<alg1,alg2,...>
|
||||
@ -67,7 +67,7 @@ List all official, built-in policies for common systems. Their file paths can t
|
||||
Look up the security information of an algorithm(s) in the internal database. Does not connect to a server.
|
||||
|
||||
.TP
|
||||
.B -M, \-\-make-policy=<policy.txt>
|
||||
.B -M, \-\-make-policy=<custom_policy.txt>
|
||||
.br
|
||||
Creates a policy based on the target server. Useful when other servers should be compared to the target server's custom configuration (i.e.: a cluster environment). Note that the resulting policy can be edited manually.
|
||||
|
||||
@ -82,7 +82,7 @@ Disable color output.
|
||||
The TCP port to connect to when auditing a server, or the port to listen on when auditing a client.
|
||||
|
||||
.TP
|
||||
.B -P, \-\-policy=<policy.txt>
|
||||
.B -P, \-\-policy=<"built-in policy name" | path/to/custom_policy.txt>
|
||||
.br
|
||||
Runs a policy audit against a target using the specified policy (see \fBPOLICY AUDIT\fP section for detailed description of this mode of operation). Combine with -c/--client-audit to audit a client configuration instead of a server. Use -L/--list-policies to list all official, built-in policies for common systems.
|
||||
|
||||
@ -109,7 +109,7 @@ By default, \fBssh-audit\fP performs a standard audit. That is, it enumerates a
|
||||
|
||||
.SH POLICY AUDIT
|
||||
.PP
|
||||
When the -P/--policy=<policy.txt> option is used, \fBssh-audit\fP performs a policy audit. The target's host key types, key exchanges, ciphers, MACs, and other information is compared to a set of expected values defined in the specified policy file. If everything matches, only a short message stating a passing result is reported. Otherwise, the field(s) that did not match are reported.
|
||||
When the -P/--policy option is used, \fBssh-audit\fP performs a policy audit. The target's host key types, key exchanges, ciphers, MACs, and other information is compared to a set of expected values defined in the specified policy file. If everything matches, only a short message stating a passing result is reported. Otherwise, the field(s) that did not match are reported.
|
||||
|
||||
.PP
|
||||
Policy auditing is helpful for ensuring a group of related servers are properly hardened to an exact specification.
|
||||
@ -140,7 +140,7 @@ ssh-audit -T servers.txt
|
||||
.RE
|
||||
|
||||
.LP
|
||||
To audit a client configuration (listens on port 2222 by default; connect using "ssh anything@localhost"):
|
||||
To audit a client configuration (listens on port 2222 by default; connect using "ssh -p 2222 anything@localhost"):
|
||||
.RS
|
||||
.nf
|
||||
ssh-audit -c
|
||||
@ -156,7 +156,7 @@ ssh-audit -c -p 4567
|
||||
.RE
|
||||
|
||||
.LP
|
||||
To list all official built-in policies (hint: use resulting file paths with -P/--policy):
|
||||
To list all official built-in policies (hint: use their full names with -P/--policy):
|
||||
.RS
|
||||
.nf
|
||||
ssh-audit -L
|
||||
@ -164,10 +164,19 @@ ssh-audit -L
|
||||
.RE
|
||||
|
||||
.LP
|
||||
To run a policy audit against a server:
|
||||
To run a built-in policy audit against a server (hint: use -L to see list of built-in policies):
|
||||
.RS
|
||||
.nf
|
||||
ssh-audit -P path/to/server_policy targetserver
|
||||
ssh-audit -P "Hardened Ubuntu Server 20.04 LTS (version 1)" targetserver
|
||||
.fi
|
||||
.RE
|
||||
|
||||
|
||||
.LP
|
||||
To run a custom policy audit against a server (hint: use -M/--make-policy to create a custom policy file):
|
||||
.RS
|
||||
.nf
|
||||
ssh-audit -P path/to/server_policy.txt targetserver
|
||||
.fi
|
||||
.RE
|
||||
|
||||
@ -175,7 +184,7 @@ ssh-audit -P path/to/server_policy targetserver
|
||||
To run a policy audit against a client:
|
||||
.RS
|
||||
.nf
|
||||
ssh-audit -c -P path/to/client_policy
|
||||
ssh-audit -c -P ["policy name" | path/to/client_policy.txt]
|
||||
.fi
|
||||
.RE
|
||||
|
||||
@ -183,7 +192,7 @@ ssh-audit -c -P path/to/client_policy
|
||||
To run a policy audit against many servers:
|
||||
.RS
|
||||
.nf
|
||||
ssh-audit -T servers.txt -P path/to/server_policy
|
||||
ssh-audit -T servers.txt -P ["policy name" | path/to/server_policy.txt]
|
||||
.fi
|
||||
.RE
|
||||
|
||||
|
||||
@ -0,0 +1 @@
|
||||
{"errors": [], "host": "localhost", "passed": true, "policy": "Hardened OpenSSH Server v8.0 (version 1)"}
|
||||
@ -0,0 +1,3 @@
|
||||
Host: localhost:2222
|
||||
Policy: Hardened OpenSSH Server v8.0 (version 1)
|
||||
Result: [0;32m✔ Passed[0m
|
||||
@ -0,0 +1 @@
|
||||
{"errors": [{"actual": ["umac-64-etm@openssh.com", "umac-128-etm@openssh.com", "hmac-sha2-256-etm@openssh.com", "hmac-sha2-512-etm@openssh.com", "hmac-sha1-etm@openssh.com", "umac-64@openssh.com", "umac-128@openssh.com", "hmac-sha2-256", "hmac-sha2-512", "hmac-sha1"], "expected_optional": [""], "expected_required": ["hmac-sha2-256-etm@openssh.com", "hmac-sha2-512-etm@openssh.com", "umac-128-etm@openssh.com"], "mismatched_field": "MACs"}], "host": "localhost", "passed": false, "policy": "Hardened OpenSSH Server v8.0 (version 1)"}
|
||||
@ -0,0 +1,6 @@
|
||||
Host: localhost:2222
|
||||
Policy: Hardened OpenSSH Server v8.0 (version 1)
|
||||
Result: [0;31m❌ Failed![0m
|
||||
[0;33m
|
||||
Errors:
|
||||
* MACs did not match. Expected: ['hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'umac-128-etm@openssh.com']; Actual: ['umac-64-etm@openssh.com', 'umac-128-etm@openssh.com', 'hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'hmac-sha1-etm@openssh.com', 'umac-64@openssh.com', 'umac-128@openssh.com', 'hmac-sha2-256', 'hmac-sha2-512', 'hmac-sha1'][0m
|
||||
@ -35,6 +35,23 @@ class TestPolicy:
|
||||
return self.ssh2_kex.parse(w.write_flush())
|
||||
|
||||
|
||||
def test_builtin_policy_consistency(self):
|
||||
'''Ensure that the BUILTIN_POLICIES struct is consistent.'''
|
||||
|
||||
for policy_name in Policy.BUILTIN_POLICIES:
|
||||
# Ensure that the policy name ends with " (version X)", where X is the 'version' field.
|
||||
version_str = " (version %s)" % Policy.BUILTIN_POLICIES[policy_name]['version']
|
||||
assert(policy_name.endswith(version_str))
|
||||
|
||||
# Ensure that each built-in policy can be loaded with Policy.load_builtin_policy().
|
||||
assert(Policy.load_builtin_policy(policy_name) is not None)
|
||||
|
||||
# Ensure that both server and client policy names are returned.
|
||||
server_policy_names, client_policy_names = Policy.list_builtin_policies()
|
||||
assert(len(server_policy_names) > 0)
|
||||
assert(len(client_policy_names) > 0)
|
||||
|
||||
|
||||
def test_policy_basic(self):
|
||||
'''Ensure that a basic policy can be parsed correctly.'''
|
||||
|
||||
@ -49,7 +66,7 @@ ciphers = cipher_alg1, cipher_alg2, cipher_alg3
|
||||
macs = mac_alg1, mac_alg2, mac_alg3'''
|
||||
|
||||
policy = self.Policy(policy_data=policy_data)
|
||||
assert str(policy) == "Name: [Test Policy]\nVersion: [1]\nBanner: {undefined}\nCompressions: comp_alg1\nHost Keys: key_alg1\nKey Exchanges: kex_alg1, kex_alg2\nCiphers: cipher_alg1, cipher_alg2, cipher_alg3\nMACs: mac_alg1, mac_alg2, mac_alg3"
|
||||
assert str(policy) == "Name: [Test Policy]\nVersion: [1]\nBanner: {undefined}\nCompressions: comp_alg1\nHost Keys: key_alg1\nOptional Host Keys: {undefined}\nKey Exchanges: kex_alg1, kex_alg2\nCiphers: cipher_alg1, cipher_alg2, cipher_alg3\nMACs: mac_alg1, mac_alg2, mac_alg3\nHost Key Sizes: {undefined}\nCA Key Sizes: {undefined}\nDH Modulus Sizes: {undefined}\nServer Policy: True"
|
||||
|
||||
|
||||
def test_policy_invalid_1(self):
|
||||
|
||||
Loading…
Reference in New Issue
Block a user