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Upgraded 1024-bit modulus warning to failure.

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Joe Testa 2020-06-30 22:51:13 -04:00
parent dd44e2f010
commit d5ef967758
9 changed files with 29 additions and 27 deletions
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1
README.md
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@ -75,6 +75,7 @@ $ brew install ssh-audit
## ChangeLog
### v2.2.1-dev (???)
- 1024-bit moduli upgraded from warnings to failures.
- Many Python 2 code clean-ups, testing framework improvements, pylint & flake8 fixes, and mypy type comments; credit [Jürgen Gmach](https://github.com/jugmac00)).
- Suppress recommendation of token host key types.
- Added 1 new host key types: `ssh-rsa1`.

19
ssh-audit.py
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@ -636,9 +636,9 @@ class SSH2: # pylint: disable=too-few-public-methods
FAIL_WEAK_ALGORITHM = 'using weak/obsolete algorithm'
FAIL_PLAINTEXT = 'no encryption/integrity'
FAIL_DEPRECATED_MAC = 'deprecated MAC'
FAIL_1024BIT_MODULUS = 'using small 1024-bit modulus'
WARN_CURVES_WEAK = 'using weak elliptic curves'
WARN_RNDSIG_KEY = 'using weak random number generator could reveal the key'
WARN_MODULUS_SIZE = 'using small 1024-bit modulus'
WARN_HASH_WEAK = 'using weak hashing algorithm'
WARN_CIPHER_MODE = 'using weak cipher mode'
WARN_BLOCK_SIZE = 'using small 64-bit block size'
@ -651,8 +651,8 @@ class SSH2: # pylint: disable=too-few-public-methods
ALGORITHMS = {
# Format: 'algorithm_name': [['version_first_appeared_in'], [reason_for_failure1, reason_for_failure2, ...], [warning1, warning2, ...]]
'kex': {
'diffie-hellman-group1-sha1': [['2.3.0,d0.28,l10.2', '6.6', '6.9'], [FAIL_OPENSSH67_UNSAFE, FAIL_OPENSSH70_LOGJAM], [WARN_MODULUS_SIZE, WARN_HASH_WEAK]],
'gss-group1-sha1-toWM5Slw5Ew8Mqkay+al2g==': [[], [FAIL_OPENSSH67_UNSAFE, FAIL_OPENSSH70_LOGJAM], [WARN_MODULUS_SIZE, WARN_HASH_WEAK]],
'diffie-hellman-group1-sha1': [['2.3.0,d0.28,l10.2', '6.6', '6.9'], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH67_UNSAFE, FAIL_OPENSSH70_LOGJAM], [WARN_HASH_WEAK]],
'gss-group1-sha1-toWM5Slw5Ew8Mqkay+al2g==': [[], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH67_UNSAFE, FAIL_OPENSSH70_LOGJAM], [WARN_HASH_WEAK]],
'gss-gex-sha1-toWM5Slw5Ew8Mqkay+al2g==': [[], [], [WARN_HASH_WEAK]],
'gss-gex-sha1-': [[], [], [WARN_HASH_WEAK]],
'gss-group1-sha1-': [[], [], [WARN_HASH_WEAK]],
@ -660,6 +660,7 @@ class SSH2: # pylint: disable=too-few-public-methods
'gss-group14-sha1-toWM5Slw5Ew8Mqkay+al2g==': [[], [], [WARN_HASH_WEAK]],
'gss-group14-sha256-toWM5Slw5Ew8Mqkay+al2g==': [[]],
'gss-group15-sha512-toWM5Slw5Ew8Mqkay+al2g==': [[]],
'diffie-hellman-group1-sha256': [[], ],
'diffie-hellman-group14-sha1': [['3.9,d0.53,l10.6.0'], [], [WARN_HASH_WEAK]],
'diffie-hellman-group14-sha256': [['7.3,d2016.73']],
'diffie-hellman-group14-sha256@ssh.com': [[]],
@ -696,7 +697,7 @@ class SSH2: # pylint: disable=too-few-public-methods
'curve25519-sha256': [['7.4,d2018.76']],
'curve448-sha512': [[]],
'kexguess2@matt.ucc.asn.au': [['d2013.57']],
'rsa1024-sha1': [[], [], [WARN_MODULUS_SIZE, WARN_HASH_WEAK]],
'rsa1024-sha1': [[], [FAIL_1024BIT_MODULUS], [WARN_HASH_WEAK]],
'rsa2048-sha256': [[]],
'sntrup4591761x25519-sha512@tinyssh.org': [['8.0'], [], [WARN_EXPERIMENTAL]],
'ext-info-c': [[]], # Extension negotiation (RFC 8308)
@ -709,20 +710,20 @@ class SSH2: # pylint: disable=too-few-public-methods
'ssh-ed25519': [['6.5,l10.7.0']],
'ssh-ed25519-cert-v01@openssh.com': [['6.5']],
'ssh-rsa': [['2.5.0,d0.28,l10.2'], [WARN_HASH_WEAK]],
'ssh-dss': [['2.1.0,d0.28,l10.2', '6.9'], [FAIL_OPENSSH70_WEAK], [WARN_MODULUS_SIZE, WARN_RNDSIG_KEY]],
'ssh-dss': [['2.1.0,d0.28,l10.2', '6.9'], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH70_WEAK], [WARN_RNDSIG_KEY]],
'ecdsa-sha2-nistp256': [['5.7,d2013.62,l10.6.4'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
'ecdsa-sha2-nistp384': [['5.7,d2013.62,l10.6.4'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
'ecdsa-sha2-nistp521': [['5.7,d2013.62,l10.6.4'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
'ecdsa-sha2-1.3.132.0.10': [[], [], [WARN_RNDSIG_KEY]], # ECDSA over secp256k1 (i.e.: the Bitcoin curve)
'x509v3-sign-dss': [[], [FAIL_OPENSSH70_WEAK], [WARN_MODULUS_SIZE, WARN_RNDSIG_KEY]],
'x509v3-sign-dss': [[], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH70_WEAK], [WARN_RNDSIG_KEY]],
'x509v3-sign-rsa': [[], [], [WARN_HASH_WEAK]],
'x509v3-sign-rsa-sha256@ssh.com': [[]],
'x509v3-ssh-dss': [[], [FAIL_OPENSSH70_WEAK], [WARN_MODULUS_SIZE, WARN_RNDSIG_KEY]],
'x509v3-ssh-dss': [[], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH70_WEAK], [WARN_RNDSIG_KEY]],
'x509v3-ssh-rsa': [[], [], [WARN_HASH_WEAK]],
'ssh-rsa-cert-v00@openssh.com': [['5.4', '6.9'], [FAIL_OPENSSH70_LEGACY], []],
'ssh-dss-cert-v00@openssh.com': [['5.4', '6.9'], [FAIL_OPENSSH70_LEGACY], [WARN_MODULUS_SIZE, WARN_RNDSIG_KEY]],
'ssh-dss-cert-v00@openssh.com': [['5.4', '6.9'], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH70_LEGACY], [WARN_RNDSIG_KEY]],
'ssh-rsa-cert-v01@openssh.com': [['5.6']],
'ssh-dss-cert-v01@openssh.com': [['5.6', '6.9'], [FAIL_OPENSSH70_WEAK], [WARN_MODULUS_SIZE, WARN_RNDSIG_KEY]],
'ssh-dss-cert-v01@openssh.com': [['5.6', '6.9'], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH70_WEAK], [WARN_RNDSIG_KEY]],
'ecdsa-sha2-nistp256-cert-v01@openssh.com': [['5.7'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
'ecdsa-sha2-nistp384-cert-v01@openssh.com': [['5.7'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
'ecdsa-sha2-nistp521-cert-v01@openssh.com': [['5.7'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],

4
test/docker/expected_results/dropbear_2019.78_test1.txt
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@ -25,8 +25,8 @@
(key) ssh-rsa (1024-bit) -- [fail] using weak hashing algorithm
 `- [warn] using small 1024-bit modulus
`- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28
(key) ssh-dss -- [fail] removed (in server) and disabled (in client) since OpenSSH 7.0, weak algorithm
 `- [warn] using small 1024-bit modulus
(key) ssh-dss -- [fail] using small 1024-bit modulus
 `- [fail] removed (in server) and disabled (in client) since OpenSSH 7.0, weak algorithm
 `- [warn] using weak random number generator could reveal the key
`- [info] available since OpenSSH 2.1.0, Dropbear SSH 0.28

8
test/docker/expected_results/openssh_4.0p1_test1.txt
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@ -31,9 +31,9 @@
`- [info] available since OpenSSH 2.3.0
(kex) diffie-hellman-group14-sha1 -- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 3.9, Dropbear SSH 0.53
(kex) diffie-hellman-group1-sha1 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
(kex) diffie-hellman-group1-sha1 -- [fail] using small 1024-bit modulus
 `- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
 `- [fail] disabled (in client) since OpenSSH 7.0, logjam attack
 `- [warn] using small 1024-bit modulus
 `- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28
@ -41,8 +41,8 @@
(key) ssh-rsa (1024-bit) -- [fail] using weak hashing algorithm
 `- [warn] using small 1024-bit modulus
`- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28
(key) ssh-dss -- [fail] removed (in server) and disabled (in client) since OpenSSH 7.0, weak algorithm
 `- [warn] using small 1024-bit modulus
(key) ssh-dss -- [fail] using small 1024-bit modulus
 `- [fail] removed (in server) and disabled (in client) since OpenSSH 7.0, weak algorithm
 `- [warn] using weak random number generator could reveal the key
`- [info] available since OpenSSH 2.1.0, Dropbear SSH 0.28

8
test/docker/expected_results/openssh_5.6p1_test1.txt
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@ -25,9 +25,9 @@
`- [info] available since OpenSSH 2.3.0
(kex) diffie-hellman-group14-sha1 -- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 3.9, Dropbear SSH 0.53
(kex) diffie-hellman-group1-sha1 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
(kex) diffie-hellman-group1-sha1 -- [fail] using small 1024-bit modulus
 `- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
 `- [fail] disabled (in client) since OpenSSH 7.0, logjam attack
 `- [warn] using small 1024-bit modulus
 `- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28
@ -35,8 +35,8 @@
(key) ssh-rsa (1024-bit) -- [fail] using weak hashing algorithm
 `- [warn] using small 1024-bit modulus
`- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28
(key) ssh-dss -- [fail] removed (in server) and disabled (in client) since OpenSSH 7.0, weak algorithm
 `- [warn] using small 1024-bit modulus
(key) ssh-dss -- [fail] using small 1024-bit modulus
 `- [fail] removed (in server) and disabled (in client) since OpenSSH 7.0, weak algorithm
 `- [warn] using weak random number generator could reveal the key
`- [info] available since OpenSSH 2.1.0, Dropbear SSH 0.28

4
test/docker/expected_results/openssh_5.6p1_test2.txt
View File

@ -25,9 +25,9 @@
`- [info] available since OpenSSH 2.3.0
(kex) diffie-hellman-group14-sha1 -- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 3.9, Dropbear SSH 0.53
(kex) diffie-hellman-group1-sha1 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
(kex) diffie-hellman-group1-sha1 -- [fail] using small 1024-bit modulus
 `- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
 `- [fail] disabled (in client) since OpenSSH 7.0, logjam attack
 `- [warn] using small 1024-bit modulus
 `- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28

4
test/docker/expected_results/openssh_5.6p1_test3.txt
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@ -25,9 +25,9 @@
`- [info] available since OpenSSH 2.3.0
(kex) diffie-hellman-group14-sha1 -- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 3.9, Dropbear SSH 0.53
(kex) diffie-hellman-group1-sha1 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
(kex) diffie-hellman-group1-sha1 -- [fail] using small 1024-bit modulus
 `- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
 `- [fail] disabled (in client) since OpenSSH 7.0, logjam attack
 `- [warn] using small 1024-bit modulus
 `- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28

4
test/docker/expected_results/openssh_5.6p1_test4.txt
View File

@ -25,9 +25,9 @@
`- [info] available since OpenSSH 2.3.0
(kex) diffie-hellman-group14-sha1 -- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 3.9, Dropbear SSH 0.53
(kex) diffie-hellman-group1-sha1 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
(kex) diffie-hellman-group1-sha1 -- [fail] using small 1024-bit modulus
 `- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
 `- [fail] disabled (in client) since OpenSSH 7.0, logjam attack
 `- [warn] using small 1024-bit modulus
 `- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28

4
test/docker/expected_results/openssh_5.6p1_test5.txt
View File

@ -25,9 +25,9 @@
`- [info] available since OpenSSH 2.3.0
(kex) diffie-hellman-group14-sha1 -- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 3.9, Dropbear SSH 0.53
(kex) diffie-hellman-group1-sha1 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
(kex) diffie-hellman-group1-sha1 -- [fail] using small 1024-bit modulus
 `- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
 `- [fail] disabled (in client) since OpenSSH 7.0, logjam attack
 `- [warn] using small 1024-bit modulus
 `- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28