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mirror of https://github.com/jtesta/ssh-audit.git synced 2025-07-06 14:02:49 -05:00

14 Commits

18 changed files with 123 additions and 48 deletions

2
.gitignore vendored
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@ -1,5 +1,7 @@
*~
*.pyc
*.exe
*.asc
venv*/
.cache/
.tox

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@ -17,6 +17,7 @@
- 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;
- runs on Linux and Windows;
- no dependencies
## Usage
@ -55,6 +56,14 @@ Below is a screen shot of the client-auditing output when an unhardened OpenSSH
Guides to harden server & client configuration can be found here: [https://www.ssh-audit.com/hardening_guides.html](https://www.ssh-audit.com/hardening_guides.html)
## ChangeLog
### v2.2.0 (2020-03-11)
- Marked host key type `ssh-rsa` as weak due to [practical SHA-1 collisions](https://eprint.iacr.org/2020/014.pdf).
- Added Windows builds.
- Added 10 new host key types: `ecdsa-sha2-1.3.132.0.10`, `x509v3-sign-dss`, `x509v3-sign-rsa`, `x509v3-sign-rsa-sha256@ssh.com`, `x509v3-ssh-dss`, `x509v3-ssh-rsa`, `sk-ecdsa-sha2-nistp256-cert-v01@openssh.com`, `sk-ecdsa-sha2-nistp256@openssh.com`, `sk-ssh-ed25519-cert-v01@openssh.com`, and `sk-ssh-ed25519@openssh.com`.
- Added 18 new key exchanges: `diffie-hellman-group14-sha256@ssh.com`, `diffie-hellman-group15-sha256@ssh.com`, `diffie-hellman-group15-sha384@ssh.com`, `diffie-hellman-group16-sha384@ssh.com`, `diffie-hellman-group16-sha512@ssh.com`, `diffie-hellman-group18-sha512@ssh.com`, `ecdh-sha2-curve25519`, `ecdh-sha2-nistb233`, `ecdh-sha2-nistb409`, `ecdh-sha2-nistk163`, `ecdh-sha2-nistk233`, `ecdh-sha2-nistk283`, `ecdh-sha2-nistk409`, `ecdh-sha2-nistp192`, `ecdh-sha2-nistp224`, `ecdh-sha2-nistt571`, `gss-gex-sha1-`, and `gss-group1-sha1-`.
- Added 9 new ciphers: `camellia128-cbc`, `camellia128-ctr`, `camellia192-cbc`, `camellia192-ctr`, `camellia256-cbc`, `camellia256-ctr`, `aes128-gcm`, `aes256-gcm`, and `chacha20-poly1305`.
- Added 2 new MACs: `aes128-gcm` and `aes256-gcm`.
### v2.1.1 (2019-11-26)
- Added 2 new host key types: `rsa-sha2-256-cert-v01@openssh.com`, `rsa-sha2-512-cert-v01@openssh.com`.
- Added 2 new ciphers: `des`, `3des`.

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@ -423,18 +423,18 @@ function run_test {
./ssh-audit.py localhost:2222 > $test_result_stdout
if [[ $? != 0 ]]; then
echo -e "${REDB}Failed to run ssh-audit.py! (exit code: $?)${CLR}"
docker container stop $cid > /dev/null
docker container stop -t 0 $cid > /dev/null
exit 1
fi
./ssh-audit.py -j localhost:2222 > $test_result_json
if [[ $? != 0 ]]; then
echo -e "${REDB}Failed to run ssh-audit.py! (exit code: $?)${CLR}"
docker container stop $cid > /dev/null
docker container stop -t 0 $cid > /dev/null
exit 1
fi
docker container stop $cid > /dev/null
docker container stop -t 0 $cid > /dev/null
if [[ $? != 0 ]]; then
echo -e "${REDB}Failed to stop docker container ${cid}! (exit code: $?)${CLR}"
exit 1

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@ -1,8 +1,8 @@
To create package and upload to test server:
# apt install virtualenv
$ virtualenv -p /usr/bin/python3 pypi_upload
$ cd pypi_upload; source bin/activate
$ virtualenv -p /usr/bin/python3 /tmp/pypi_upload
$ cd /tmp/pypi_upload; source bin/activate
$ pip3 install twine
$ cp -R path/to/ssh-audit .
$ cd ssh-audit/pypi
@ -12,6 +12,6 @@ $ make uploadtest
To download from test server and verify:
$ virtualenv -p /usr/bin/python3 pypi_test
$ cd pypi_test; source bin/activate
$ virtualenv -p /usr/bin/python3 /tmp/pypi_test
$ cd /tmp/pypi_test; source bin/activate
$ pip3 install --index-url https://test.pypi.org/simple ssh-audit

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@ -20,7 +20,7 @@ setup(
"console_scripts": ['ssh-audit = sshaudit.sshaudit:main']
},
version = version,
description = "An SSH server configuration security auditing tool",
description = "An SSH server & client configuration security auditing tool",
long_description = long_descr,
long_description_content_type = "text/markdown",
author = "Joe Testa",

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@ -3,7 +3,7 @@
"""
The MIT License (MIT)
Copyright (C) 2017-2019 Joe Testa (jtesta@positronsecurity.com)
Copyright (C) 2017-2020 Joe Testa (jtesta@positronsecurity.com)
Copyright (C) 2017 Andris Raugulis (moo@arthepsy.eu)
Permission is hereby granted, free of charge, to any person obtaining a copy
@ -27,7 +27,8 @@
from __future__ import print_function
import base64, binascii, errno, hashlib, getopt, io, os, random, re, select, socket, struct, sys, json
VERSION = 'v2.1.1'
VERSION = 'v2.2.0'
SSH_HEADER = 'SSH-{0}-OpenSSH_8.0' # SSH software to impersonate
if sys.version_info.major < 3:
@ -50,7 +51,7 @@ except ImportError: # pragma: nocover
pass
try: # pragma: nocover
from colorama import init as colorama_init
colorama_init() # pragma: nocover
colorama_init(strip=False) # pragma: nocover
except ImportError: # pragma: nocover
pass
@ -151,7 +152,7 @@ class AuditConf(object):
aconf = cls()
try:
sopts = 'h1246p:bcnjvl:t:'
lopts = ['help', 'ssh1', 'ssh2', 'ipv4', 'ipv6', 'port', 'json',
lopts = ['help', 'ssh1', 'ssh2', 'ipv4', 'ipv6', 'port=', 'json',
'batch', 'client-audit', 'no-colors', 'verbose', 'level=', 'timeout=']
opts, args = getopt.gnu_getopt(args, sopts, lopts)
except getopt.GetoptError as err:
@ -339,25 +340,43 @@ class SSH2(object): # pylint: disable=too-few-public-methods
'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]],
'gss-gex-sha1-toWM5Slw5Ew8Mqkay+al2g==': [[], [], [WARN_HASH_WEAK]],
'gss-gex-sha1-': [[], [], [WARN_HASH_WEAK]],
'gss-group1-sha1-': [[], [], [WARN_HASH_WEAK]],
'gss-group14-sha1-': [[], [], [WARN_HASH_WEAK]],
'gss-group14-sha1-toWM5Slw5Ew8Mqkay+al2g==': [[], [], [WARN_HASH_WEAK]],
'gss-group14-sha256-toWM5Slw5Ew8Mqkay+al2g==': [[]],
'gss-group15-sha512-toWM5Slw5Ew8Mqkay+al2g==': [[]],
'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': [[]],
'diffie-hellman-group15-sha256': [[]],
'diffie-hellman-group15-sha256@ssh.com': [[]],
'diffie-hellman-group15-sha384@ssh.com': [[]],
'diffie-hellman-group15-sha512': [[]],
'diffie-hellman-group16-sha256': [[]],
'diffie-hellman-group16-sha384@ssh.com': [[]],
'diffie-hellman-group16-sha512': [['7.3,d2016.73']],
'diffie-hellman-group16-sha512@ssh.com': [[]],
'diffie-hellman-group17-sha512': [[]],
'diffie-hellman-group18-sha512': [['7.3']],
'diffie-hellman-group18-sha512@ssh.com': [[]],
'diffie-hellman-group-exchange-sha1': [['2.3.0', '6.6', None], [FAIL_OPENSSH67_UNSAFE], [WARN_HASH_WEAK]],
'diffie-hellman-group-exchange-sha256': [['4.4']],
'diffie-hellman-group-exchange-sha256@ssh.com': [[]],
'diffie-hellman-group-exchange-sha512@ssh.com': [[]],
'ecdh-sha2-curve25519': [[], []],
'ecdh-sha2-nistb233': [[], [WARN_CURVES_WEAK]],
'ecdh-sha2-nistb409': [[], [WARN_CURVES_WEAK]],
'ecdh-sha2-nistk163': [[], [WARN_CURVES_WEAK]],
'ecdh-sha2-nistk233': [[], [WARN_CURVES_WEAK]],
'ecdh-sha2-nistk283': [[], [WARN_CURVES_WEAK]],
'ecdh-sha2-nistk409': [[], [WARN_CURVES_WEAK]],
'ecdh-sha2-nistp192': [[], [WARN_CURVES_WEAK]],
'ecdh-sha2-nistp224': [[], [WARN_CURVES_WEAK]],
'ecdh-sha2-nistp256': [['5.7,d2013.62,l10.6.0'], [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-nistt571': [[], [WARN_CURVES_WEAK]],
'ecdh-sha2-1.3.132.0.10': [[]], # ECDH over secp256k1 (i.e.: the Bitcoin curve)
'curve25519-sha256@libssh.org': [['6.5,d2013.62,l10.6.0']],
'curve25519-sha256': [['7.4,d2018.76']],
@ -374,11 +393,17 @@ class SSH2(object): # pylint: disable=too-few-public-methods
'rsa-sha2-512': [['7.2']],
'ssh-ed25519': [['6.5,l10.7.0']],
'ssh-ed25519-cert-v01@openssh.com': [['6.5']],
'ssh-rsa': [['2.5.0,d0.28,l10.2']],
'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]],
'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-rsa': [[], [], [WARN_HASH_WEAK]],
'x509v3-sign-rsa-sha256@ssh.com': [[]],
'x509v3-ssh-dss': [[], [FAIL_OPENSSH70_WEAK], [WARN_MODULUS_SIZE, 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-rsa-cert-v01@openssh.com': [['5.6']],
@ -390,6 +415,10 @@ class SSH2(object): # pylint: disable=too-few-public-methods
'rsa-sha2-512-cert-v01@openssh.com': [['7.8']],
'ssh-rsa-sha256@ssh.com': [[]],
'ecdsa-sha2-1.3.132.0.10': [[], [], [WARN_RNDSIG_KEY]], # ECDSA over secp256k1 (i.e.: the Bitcoin curve)
'sk-ecdsa-sha2-nistp256-cert-v01@openssh.com': [['8.2'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
'sk-ecdsa-sha2-nistp256@openssh.com': [['8.2'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
'sk-ssh-ed25519-cert-v01@openssh.com': [['8.2']],
'sk-ssh-ed25519@openssh.com': [['8.2']],
},
'enc': {
'none': [['1.2.2,d2013.56,l10.2'], [FAIL_PLAINTEXT]],
@ -432,9 +461,18 @@ class SSH2(object): # pylint: disable=too-few-public-methods
'aes128-ctr': [['3.7,d0.52,l10.4.1']],
'aes192-ctr': [['3.7,l10.4.1']],
'aes256-ctr': [['3.7,d0.52,l10.4.1']],
'aes128-gcm': [[]],
'aes256-gcm': [[]],
'aes128-gcm@openssh.com': [['6.2']],
'aes256-gcm@openssh.com': [['6.2']],
'chacha20-poly1305': [[], [], [], [INFO_OPENSSH69_CHACHA]],
'chacha20-poly1305@openssh.com': [['6.5'], [], [], [INFO_OPENSSH69_CHACHA]],
'camellia128-cbc': [[], [], [WARN_CIPHER_MODE]],
'camellia128-ctr': [[]],
'camellia192-cbc': [[], [], [WARN_CIPHER_MODE]],
'camellia192-ctr': [[]],
'camellia256-cbc': [[], [], [WARN_CIPHER_MODE]],
'camellia256-ctr': [[]],
},
'mac': {
'none': [['d2013.56'], [FAIL_PLAINTEXT]],
@ -475,6 +513,8 @@ class SSH2(object): # pylint: disable=too-few-public-methods
'umac-64-etm@openssh.com': [['6.2'], [], [WARN_TAG_SIZE]],
'umac-96@openssh.com': [[], [], [WARN_ENCRYPT_AND_MAC]], # Despite having the @openssh.com suffix, this may never have shipped with OpenSSH (!).
'umac-128-etm@openssh.com': [['6.2']],
'aes128-gcm': [[]],
'aes256-gcm': [[]],
}
} # type: Dict[str, Dict[str, List[List[Optional[str]]]]]
@ -1761,8 +1801,10 @@ class SSH(object): # pylint: disable=too-few-public-methods
rec[sshv][alg_type] = {'add': {}, 'del': {}, 'chg': {}}
for n, alg_desc in alg_db[alg_type].items():
versions = alg_desc[0]
empty_version = False
if len(versions) == 0 or versions[0] is None:
continue
empty_version = True
if not empty_version:
matches = False
if unknown_software:
matches = True
@ -1788,13 +1830,13 @@ class SSH(object): # pylint: disable=too-few-public-methods
if fc > 0:
faults += pow(10, 2 - i) * fc
if n not in alg_list:
if faults > 0 or (alg_type == 'key' and '-cert-' in n):
if faults > 0 or (alg_type == 'key' and '-cert-' in n) or empty_version:
continue
rec[sshv][alg_type]['add'][n] = 0
else:
if faults == 0:
continue
if n in ['diffie-hellman-group-exchange-sha256', 'ssh-rsa', 'rsa-sha2-256', 'rsa-sha2-512', 'ssh-rsa-cert-v01@openssh.com']:
if n in ['diffie-hellman-group-exchange-sha256', 'rsa-sha2-256', 'rsa-sha2-512', 'ssh-rsa-cert-v01@openssh.com']:
rec[sshv][alg_type]['chg'][n] = faults
else:
rec[sshv][alg_type]['del'][n] = faults

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@ -22,7 +22,8 @@
(key) ecdsa-sha2-nistp256 -- [fail] using weak elliptic curves
 `- [warn] using weak random number generator could reveal the key
`- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
(key) ssh-rsa (1024-bit) -- [fail] using small 1024-bit modulus
(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
@ -63,7 +64,6 @@
(fin) ssh-rsa: SHA256:CDfAU12pjQS7/91kg7gYacza0U/6PDbE04Ic3IpYxkM
# algorithm recommendations (for Dropbear SSH 2019.78)
(rec) !ssh-rsa -- key algorithm to change (increase modulus size to 2048 bits or larger) 
(rec) -3des-cbc -- enc algorithm to remove 
(rec) -3des-ctr -- enc algorithm to remove 
(rec) -aes128-cbc -- enc algorithm to remove 
@ -71,7 +71,6 @@
(rec) -ecdh-sha2-nistp256 -- kex algorithm to remove 
(rec) -ecdh-sha2-nistp384 -- kex algorithm to remove 
(rec) -ecdh-sha2-nistp521 -- kex algorithm to remove 
(rec) -ecdsa-sha2-nistp256 -- key algorithm to remove 
(rec) -hmac-sha1-96 -- mac algorithm to remove 
(rec) -ssh-dss -- key algorithm to remove 
(rec) +diffie-hellman-group16-sha512 -- kex algorithm to append 

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@ -38,7 +38,8 @@
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28
# host-key algorithms
(key) ssh-rsa (1024-bit) -- [fail] using small 1024-bit modulus
(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
@ -116,7 +117,6 @@
(fin) ssh-rsa: SHA256:YZ457EBcJTSxRKI3yXRgtAj3PBf5B9/F36b1SVooml4
# algorithm recommendations (for OpenSSH 4.0)
(rec) !ssh-rsa -- key algorithm to change (increase modulus size to 2048 bits or larger) 
(rec) -3des-cbc -- enc algorithm to remove 
(rec) -aes128-cbc -- enc algorithm to remove 
(rec) -aes192-cbc -- enc algorithm to remove 

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@ -32,7 +32,8 @@
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28
# host-key algorithms
(key) ssh-rsa (1024-bit) -- [fail] using small 1024-bit modulus
(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
@ -122,7 +123,6 @@
# algorithm recommendations (for OpenSSH 5.6)
(rec) !diffie-hellman-group-exchange-sha256 -- kex algorithm to change (increase modulus size to 2048 bits or larger) 
(rec) !ssh-rsa -- key algorithm to change (increase modulus size to 2048 bits or larger) 
(rec) -3des-cbc -- enc algorithm to remove 
(rec) -aes128-cbc -- enc algorithm to remove 
(rec) -aes192-cbc -- enc algorithm to remove 

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@ -32,7 +32,8 @@
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28
# host-key algorithms
(key) ssh-rsa (1024-bit) -- [fail] using small 1024-bit modulus
(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-rsa-cert-v01@openssh.com (1024-bit cert/1024-bit CA) -- [fail] using small 1024-bit modulus
`- [info] available since OpenSSH 5.6
@ -120,7 +121,6 @@
# algorithm recommendations (for OpenSSH 5.6)
(rec) !diffie-hellman-group-exchange-sha256 -- kex algorithm to change (increase modulus size to 2048 bits or larger) 
(rec) !ssh-rsa -- key algorithm to change (increase modulus size to 2048 bits or larger) 
(rec) !ssh-rsa-cert-v01@openssh.com -- key algorithm to change (increase modulus size to 2048 bits or larger) 
(rec) -3des-cbc -- enc algorithm to remove 
(rec) -aes128-cbc -- enc algorithm to remove 
@ -139,6 +139,7 @@
(rec) -hmac-ripemd160@openssh.com -- mac algorithm to remove 
(rec) -hmac-sha1-96 -- mac algorithm to remove 
(rec) -rijndael-cbc@lysator.liu.se -- enc algorithm to remove 
(rec) -ssh-rsa -- key algorithm to remove 
(rec) -diffie-hellman-group14-sha1 -- kex algorithm to remove 
# additional info

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@ -32,7 +32,8 @@
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28
# host-key algorithms
(key) ssh-rsa (1024-bit) -- [fail] using small 1024-bit modulus
(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-rsa-cert-v01@openssh.com (1024-bit cert/3072-bit CA) -- [fail] using small 1024-bit modulus
`- [info] available since OpenSSH 5.6
@ -120,7 +121,6 @@
# algorithm recommendations (for OpenSSH 5.6)
(rec) !diffie-hellman-group-exchange-sha256 -- kex algorithm to change (increase modulus size to 2048 bits or larger) 
(rec) !ssh-rsa -- key algorithm to change (increase modulus size to 2048 bits or larger) 
(rec) !ssh-rsa-cert-v01@openssh.com -- key algorithm to change (increase modulus size to 2048 bits or larger) 
(rec) -3des-cbc -- enc algorithm to remove 
(rec) -aes128-cbc -- enc algorithm to remove 
@ -139,6 +139,7 @@
(rec) -hmac-ripemd160@openssh.com -- mac algorithm to remove 
(rec) -hmac-sha1-96 -- mac algorithm to remove 
(rec) -rijndael-cbc@lysator.liu.se -- enc algorithm to remove 
(rec) -ssh-rsa -- key algorithm to remove 
(rec) -diffie-hellman-group14-sha1 -- kex algorithm to remove 
# additional info

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@ -32,7 +32,8 @@
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28
# host-key algorithms
(key) ssh-rsa (3072-bit) -- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28
(key) ssh-rsa (3072-bit) -- [fail] using weak hashing algorithm
`- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28
(key) ssh-rsa-cert-v01@openssh.com (3072-bit cert/1024-bit CA) -- [fail] using small 1024-bit modulus
`- [info] available since OpenSSH 5.6
@ -137,6 +138,7 @@
(rec) -hmac-ripemd160@openssh.com -- mac algorithm to remove 
(rec) -hmac-sha1-96 -- mac algorithm to remove 
(rec) -rijndael-cbc@lysator.liu.se -- enc algorithm to remove 
(rec) -ssh-rsa -- key algorithm to remove 
(rec) -diffie-hellman-group14-sha1 -- kex algorithm to remove 
# additional info

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@ -32,7 +32,8 @@
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28
# host-key algorithms
(key) ssh-rsa (3072-bit) -- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28
(key) ssh-rsa (3072-bit) -- [fail] using weak hashing algorithm
`- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28
(key) ssh-rsa-cert-v01@openssh.com (3072-bit cert/3072-bit CA) -- [info] available since OpenSSH 5.6
# encryption algorithms (ciphers)
@ -135,6 +136,7 @@
(rec) -hmac-ripemd160@openssh.com -- mac algorithm to remove 
(rec) -hmac-sha1-96 -- mac algorithm to remove 
(rec) -rijndael-cbc@lysator.liu.se -- enc algorithm to remove 
(rec) -ssh-rsa -- key algorithm to remove 
(rec) -diffie-hellman-group14-sha1 -- kex algorithm to remove 
# additional info

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# host-key algorithms
(key) rsa-sha2-512 (3072-bit) -- [info] available since OpenSSH 7.2
(key) rsa-sha2-256 (3072-bit) -- [info] available since OpenSSH 7.2
(key) ssh-rsa (3072-bit) -- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28
(key) ssh-rsa (3072-bit) -- [fail] using weak hashing algorithm
`- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28
(key) ecdsa-sha2-nistp256 -- [fail] using weak elliptic curves
 `- [warn] using weak random number generator could reveal the key
`- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
@ -68,6 +69,7 @@
(rec) -ecdh-sha2-nistp384 -- kex algorithm to remove 
(rec) -ecdh-sha2-nistp521 -- kex algorithm to remove 
(rec) -ecdsa-sha2-nistp256 -- key algorithm to remove 
(rec) -ssh-rsa -- key algorithm to remove 
(rec) -diffie-hellman-group14-sha1 -- kex algorithm to remove 
(rec) -hmac-sha1 -- mac algorithm to remove 
(rec) -hmac-sha1-etm@openssh.com -- mac algorithm to remove 

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@ -63,7 +63,6 @@
(rec) -ecdh-sha2-nistp521 -- kex algorithm to remove 
(rec) +rsa-sha2-256 -- key algorithm to append 
(rec) +rsa-sha2-512 -- key algorithm to append 
(rec) +ssh-rsa -- key algorithm to append 
(rec) -diffie-hellman-group14-sha1 -- kex algorithm to remove 
(rec) -hmac-sha1 -- mac algorithm to remove 
(rec) -hmac-sha1-etm@openssh.com -- mac algorithm to remove 

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@ -35,5 +35,4 @@
(rec) +diffie-hellman-group18-sha512 -- kex algorithm to append 
(rec) +rsa-sha2-256 -- key algorithm to append 
(rec) +rsa-sha2-512 -- key algorithm to append 
(rec) +ssh-rsa -- key algorithm to append 

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Below are notes for creating a Windows executable.
An executable can only be made on a Windows host because the PyInstaller tool (https://www.pyinstaller.org/) does not support cross-compilation.
On a Windows machine, do the following:
1.) Install Python v3.7.x from https://www.python.org/. (As of this writing v3.8.0 isn't supported.) To make life easier, check the option to add Python to the PATH environment variable.
2.) Using pip, install pyinstaller and colorama:
pip install pyinstaller colorama
3.) Create the executable with:
pyinstaller -F --icon windows_icon.ico ssh-audit.py
4.) The 'dist' folder will have the resulting ssh-audit.exe.

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