ssh-audit/README.md

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# ssh-audit
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**ssh-audit** is a tool for ssh server auditing.
## Features
- SSH1 and SSH2 protocol server support;
- grab banner, recognize device or software and operating system, detect compression;
- gather key-exchange, host-key, encryption and message authentication code algorithms;
- output algorithm information (available since, removed/disabled, unsafe/weak/legacy, etc);
- output algorithm recommendations (append or remove based on recognized software version);
- output security information (related issues, assigned CVE list, etc);
- analyze SSH version compatibility based on algorithm information;
- historical information from OpenSSH, Dropbear SSH and libssh;
- no dependencies, compatible with Python 2.6+, Python 3.x and PyPy;
## Usage
```
usage: ssh-audit.py [-1246pbnvlt] <host>
-1, --ssh1 force ssh version 1 only
-2, --ssh2 force ssh version 2 only
-4, --ipv4 enable IPv4 (order of precedence)
-6, --ipv6 enable IPv6 (order of precedence)
-p, --port=<port> port to connect
-b, --batch batch output
-n, --no-colors disable colors
-v, --verbose verbose output
-l, --level=<level> minimum output level (info|warn|fail)
-t, --timeout=<secs> timeout (in seconds) for connection and reading
(default: 5)
```
* if both IPv4 and IPv6 are used, order of precedence can be set by using either `-46` or `-64`.
* batch flag `-b` will output sections without header and without empty lines (implies verbose flag).
* verbose flag `-v` will prefix each line with section type and algorithm name.
### Example
![screenshot](https://user-images.githubusercontent.com/2982011/63970414-104bdb00-ca72-11e9-832f-3e535be32811.png)
## ChangeLog
### v2.0.0 (2019-08-29)
- Forked from https://github.com/arthepsy/ssh-audit (development was stalled, and developer went MIA).
- Added RSA host key length test.
- Added RSA certificate key length test.
- Added Diffie-Hellman modulus size test.
- Now outputs host key fingerprints for RSA and ED25519.
- Added 5 new key exchanges: `sntrup4591761x25519-sha512@tinyssh.org`, `diffie-hellman-group-exchange-sha256@ssh.com`, `diffie-hellman-group-exchange-sha512@ssh.com`, `diffie-hellman-group16-sha256`, `diffie-hellman-group17-sha512`.
- Added 3 new encryption algorithms: `des-cbc-ssh1`, `blowfish-ctr`, `twofish-ctr`.
- Added 10 new MACs: `hmac-sha2-56`, `hmac-sha2-224`, `hmac-sha2-384`, `hmac-sha3-256`, `hmac-sha3-384`, `hmac-sha3-512`, `hmac-sha256`, `hmac-sha256@ssh.com`, `hmac-sha512`, `hmac-512@ssh.com`.
- Added command line argument (-t / --timeout) for connection & reading timeouts.
- Updated CVEs for libssh & Dropbear.
### v1.7.0 (2016-10-26)
- implement options to allow specify IPv4/IPv6 usage and order of precedence
- implement option to specify remote port (old behavior kept for compatibility)
- add colors support for Microsoft Windows via optional colorama dependency
- fix encoding and decoding issues, add tests, do not crash on encoding errors
- use mypy-lang for static type checking and verify all code
### v1.6.0 (2016-10-14)
- implement algorithm recommendations section (based on recognized software)
- implement full libssh support (version history, algorithms, security, etc)
- fix SSH-1.99 banner recognition and version comparison functionality
- do not output empty algorithms (happens for misconfigured servers)
- make consistent output for Python 3.x versions
- add a lot more tests (conf, banner, software, SSH1/SSH2, output, etc)
- use Travis CI to test for multiple Python versions (2.6-3.5, pypy, pypy3)
### v1.5.0 (2016-09-20)
- create security section for related security information
- match and output assigned CVE list and security issues for Dropbear SSH
- implement full SSH1 support with fingerprint information
- automatically fallback to SSH1 on protocol mismatch
- add new options to force SSH1 or SSH2 (both allowed by default)
- parse banner information and convert it to specific software and OS version
- do not use padding in batch mode
- several fixes (Cisco sshd, rare hangs, error handling, etc)
### v1.0.20160902
- implement batch output option
- implement minimum output level option
- fix compatibility with Python 2.6
### v1.0.20160812
- implement SSH version compatibility feature
- fix wrong mac algorithm warning
- fix Dropbear SSH version typo
- parse pre-banner header
- better errors handling
### v1.0.20160803
- use OpenSSH 7.3 banner
- add new key-exchange algorithms
### v1.0.20160207
- use OpenSSH 7.2 banner
- additional warnings for OpenSSH 7.2
- fix OpenSSH 7.0 failure messages
- add rijndael-cbc failure message from OpenSSH 6.7
### v1.0.20160105
- multiple additional warnings
- support for none algorithm
- better compression handling
- ensure reading enough data (fixes few Linux SSH)
### v1.0.20151230
- Dropbear SSH support
### v1.0.20151223
- initial version