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Add OpenSSH 7.4 changes and use as default banner.

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Andris Raugulis 2017-01-24 12:45:53 +02:00
parent 54b0960502
commit 9ac03d368a
1 changed files with 4 additions and 2 deletions
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6
ssh-audit.py
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@ -269,6 +269,7 @@ class OutputBuffer(list):
class SSH2(object): # pylint: disable=too-few-public-methods class SSH2(object): # pylint: disable=too-few-public-methods
class KexDB(object): # pylint: disable=too-few-public-methods class KexDB(object): # pylint: disable=too-few-public-methods
# pylint: disable=bad-whitespace # pylint: disable=bad-whitespace
WARN_OPENSSH74_UNSAFE = 'disabled (in client) since OpenSSH 7.4, unsafe algorithm'
WARN_OPENSSH72_LEGACY = 'disabled (in client) since OpenSSH 7.2, legacy algorithm' WARN_OPENSSH72_LEGACY = 'disabled (in client) since OpenSSH 7.2, legacy algorithm'
FAIL_OPENSSH70_LEGACY = 'removed since OpenSSH 7.0, legacy algorithm' FAIL_OPENSSH70_LEGACY = 'removed since OpenSSH 7.0, legacy algorithm'
FAIL_OPENSSH70_WEAK = 'removed (in server) and disabled (in client) since OpenSSH 7.0, weak algorithm' FAIL_OPENSSH70_WEAK = 'removed (in server) and disabled (in client) since OpenSSH 7.0, weak algorithm'
@ -304,6 +305,7 @@ class SSH2(object): # pylint: disable=too-few-public-methods
'ecdh-sha2-nistp384': [['5.7,d2013.62'], [WARN_CURVES_WEAK]], 'ecdh-sha2-nistp384': [['5.7,d2013.62'], [WARN_CURVES_WEAK]],
'ecdh-sha2-nistp521': [['5.7,d2013.62'], [WARN_CURVES_WEAK]], 'ecdh-sha2-nistp521': [['5.7,d2013.62'], [WARN_CURVES_WEAK]],
'curve25519-sha256@libssh.org': [['6.5,d2013.62,l10.6.0']], 'curve25519-sha256@libssh.org': [['6.5,d2013.62,l10.6.0']],
'curve25519-sha256': [['7.4']],
'kexguess2@matt.ucc.asn.au': [['d2013.57']], 'kexguess2@matt.ucc.asn.au': [['d2013.57']],
}, },
'key': { 'key': {
@ -326,7 +328,7 @@ class SSH2(object): # pylint: disable=too-few-public-methods
}, },
'enc': { 'enc': {
'none': [['1.2.2,d2013.56,l10.2'], [FAIL_PLAINTEXT]], 'none': [['1.2.2,d2013.56,l10.2'], [FAIL_PLAINTEXT]],
'3des-cbc': [['1.2.2,d0.28,l10.2', '6.6', None], [FAIL_OPENSSH67_UNSAFE], [WARN_CIPHER_WEAK, WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], '3des-cbc': [['1.2.2,d0.28,l10.2', '6.6', None], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH74_UNSAFE, WARN_CIPHER_WEAK, WARN_CIPHER_MODE, WARN_BLOCK_SIZE]],
'3des-ctr': [['d0.52']], '3des-ctr': [['d0.52']],
'blowfish-cbc': [['1.2.2,d0.28,l10.2', '6.6,d0.52', '7.1,d0.52'], [FAIL_OPENSSH67_UNSAFE, FAIL_DBEAR53_DISABLED], [WARN_OPENSSH72_LEGACY, WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], 'blowfish-cbc': [['1.2.2,d0.28,l10.2', '6.6,d0.52', '7.1,d0.52'], [FAIL_OPENSSH67_UNSAFE, FAIL_DBEAR53_DISABLED], [WARN_OPENSSH72_LEGACY, WARN_CIPHER_MODE, WARN_BLOCK_SIZE]],
'twofish-cbc': [['d0.28', 'd2014.66'], [FAIL_DBEAR67_DISABLED], [WARN_CIPHER_MODE]], 'twofish-cbc': [['d0.28', 'd2014.66'], [FAIL_DBEAR67_DISABLED], [WARN_CIPHER_MODE]],
@ -1578,7 +1580,7 @@ class SSH(object): # pylint: disable=too-few-public-methods
# type: (int) -> Tuple[Optional[SSH.Banner], List[text_type], Optional[str]] # type: (int) -> Tuple[Optional[SSH.Banner], List[text_type], Optional[str]]
if self.__sock is None: if self.__sock is None:
return self.__banner, self.__header, 'not connected' return self.__banner, self.__header, 'not connected'
banner = 'SSH-{0}-OpenSSH_7.3'.format('1.5' if sshv == 1 else '2.0') banner = 'SSH-{0}-OpenSSH_7.4'.format('1.5' if sshv == 1 else '2.0')
rto = self.__sock.gettimeout() rto = self.__sock.gettimeout()
self.__sock.settimeout(0.7) self.__sock.settimeout(0.7)
s, e = self.recv() s, e = self.recv()