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Updated ext-info-c and ext-info-s key exchanges to include versions of OpenSSH they were first included in. (#291)

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This commit is contained in:
Joe Testa 2024-10-07 17:41:39 -04:00
parent 1e060a94c0
commit d0628f6eb4
2 changed files with 7 additions and 4 deletions
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7
src/ssh_audit/algorithms.py
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@ -172,8 +172,11 @@ class Algorithms:
if fc > 0:
faults += pow(10, 2 - i) * fc
if n not in alg_list:
# Don't recommend certificate or token types; these will only appear in the server's list if they are fully configured & functional on the server.
if faults > 0 or (alg_type == 'key' and (('-cert-' in n) or (n.startswith('sk-')))) or empty_version:
# Don't recommend certificate or token types; these will only appear in the server's list if they are fully configured & functional on the server. Also don't recommend 'ext-info-[cs]' nor 'kex-strict-[cs]-v00@openssh.com' key exchanges.
if faults > 0 or \
(alg_type == 'key' and (('-cert-' in n) or (n.startswith('sk-')))) or \
(alg_type == 'kex' and (n.startswith('ext-info-') or n.startswith('kex-strict-'))) or \
empty_version:
continue
rec[sshv][alg_type]['add'][n] = 0
else:

4
src/ssh_audit/ssh2_kexdb.py
View File

@ -160,8 +160,8 @@ class SSH2_KexDB: # pylint: disable=too-few-public-methods
'ecdh-sha2-wiRIU8TKjMZ418sMqlqtvQ==': [[], [FAIL_UNPROVEN]], # sect283k1
'ecdh-sha2-zD/b3hu/71952ArpUG4OjQ==': [[], [FAIL_UNPROVEN, FAIL_SMALL_ECC_MODULUS]], # sect233k1
'ecmqv-sha2': [[], [FAIL_UNPROVEN]],
'ext-info-c': [[], [], [], [INFO_EXTENSION_NEGOTIATION]], # Extension negotiation (RFC 8308)
'ext-info-s': [[], [], [], [INFO_EXTENSION_NEGOTIATION]], # Extension negotiation (RFC 8308)
'ext-info-c': [['7.2'], [], [], [INFO_EXTENSION_NEGOTIATION]], # Extension negotiation (RFC 8308)
'ext-info-s': [['9.6'], [], [], [INFO_EXTENSION_NEGOTIATION]], # Extension negotiation (RFC 8308)
'kex-strict-c-v00@openssh.com': [[], [], [], [INFO_STRICT_KEX]], # Strict KEX marker (countermeasure for CVE-2023-48795).
'kex-strict-s-v00@openssh.com': [[], [], [], [INFO_STRICT_KEX]], # Strict KEX marker (countermeasure for CVE-2023-48795).