base on SSH server & client security auditing (banner, key exchange, encryption, mac, compression, compatibility, security, etc) # ssh-audit
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**ssh-audit** is a tool for ssh server & client configuration auditing.
[jtesta/ssh-audit](https://github.com/jtesta/ssh-audit/) (v2.0+) is the updated and maintained version of ssh-audit forked from [arthepsy/ssh-audit](https://github.com/arthepsy/ssh-audit) (v1.x) due to inactivity.
- [Features](#features)
- [Usage](#usage)
- [Screenshots](#screenshots)
- [Server Standard Audit Example](#server-standard-audit-example)
- [Server Policy Audit Example](#server-policy-audit-example)
- [Client Standard Audit Example](#client-standard-audit-example)
- [Hardening Guides](#hardening-guides)
- [Pre-Built Packages](#pre-built-packages)
- [Web Front-End](#web-front-end)
- [ChangeLog](#changelog)
## Features
- SSH1 and SSH2 protocol server support;
- analyze SSH client configuration;
- grab banner, recognize device or software and operating system, detect compression;
- gather key-exchange, host-key, encryption and message authentication code algorithms;
- output algorithm security information (available since, removed/disabled, unsafe/weak/legacy, etc);
- output algorithm recommendations (append or remove based on recognized software version);
- analyze SSH version compatibility based on algorithm information;
- historical information from OpenSSH, Dropbear SSH and libssh;
- policy scans to ensure adherence to a hardened/standard configuration;
- runs on Linux and Windows;
- supports Python 3.8 - 3.13;
- no dependencies
## Usage
```
usage: ssh-audit.py [-h] [-1] [-2] [-4] [-6] [-b] [-c] [-d]
[-g <min1:pref1:max1[,min2:pref2:max2,...]> / <x-y[:step]>] [-j] [-l {info,warn,fail}] [-L]
[-M custom_policy.txt] [-m] [-n] [-P "Built-In Policy Name" / custom_policy.txt] [-p N]
[-T targets.txt] [-t N] [-v] [--conn-rate-test N[:max_rate]] [--dheat N[:kex[:e_len]]]
[--lookup alg1[,alg2,...]] [--skip-rate-test] [--threads N]
[host]
positional arguments:
host target hostname or IPv4/IPv6 address
optional arguments:
-h, --help show this help message and exit
-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)
-b, --batch batch output
-c, --client-audit starts a server on port 2222 to audit client software config (use -p to change port; use -t
to change timeout)
-d, --debug enable debugging output
-g <min1:pref1:max1[,min2:pref2:max2,...]> / <x-y[:step]>, --gex-test <min1:pref1:max1[,min2:pref2:max2,...]> / <x-y[:step]>
conducts a very customized Diffie-Hellman GEX modulus size test. Tests an array of minimum,
preferred, and maximum values, or a range of values with an optional incremental step amount
-j, --json enable JSON output (use -jj to enable indentation for better readability)
-l {info,warn,fail}, --level {info,warn,fail}
minimum output level (default: info)
-L, --list-policies list all the official, built-in policies. Combine with -v to view policy change logs
-M custom_policy.txt, --make-policy custom_policy.txt
creates a policy based on the target server (i.e.: the target server has the ideal
configuration that other servers should adhere to), and stores it in the file path specified
-m, --manual print the man page (Docker, PyPI, Snap, and Windows builds only)
-n, --no-colors disable colors (automatic when the NO_COLOR environment variable is set)
-P "Built-In Policy Name" / custom_policy.txt, --policy "Built-In Policy Name" / custom_policy.txt
run a policy test using the specified policy (use -L to see built-in policies, or specify
filesystem path to custom policy created by -M)
-p N, --port N the TCP port to connect to (or to listen on when -c is used)
-T targets.txt, --targets targets.txt
a file containing a list of target hosts (one per line, format HOST[:PORT]). Use -p/--port
to set the default port for all hosts. Use --threads to control concurrent scans
-t N, --timeout N timeout (in seconds) for connection and reading (default: 5)
-v, --verbose enable verbose output
--conn-rate-test N[:max_rate]
perform a connection rate test (useful for collecting metrics related to susceptibility of
the DHEat vuln). Testing is conducted with N concurrent sockets with an optional maximum
rate of connections per second
--dheat N[:kex[:e_len]]
continuously perform the DHEat DoS attack (CVE-2002-20001) against the target using N
concurrent sockets. Optionally, a specific key exchange algorithm can be specified instead
of allowing it to be automatically chosen. Additionally, a small length of the fake e value
sent to the server can be chosen for a more efficient attack (such as 4).
--lookup alg1[,alg2,...]
looks up an algorithm(s) without connecting to a server.
--skip-rate-test skip the connection rate test during standard audits (used to safely infer whether the DHEat
attack is viable)
--threads N number of threads to use when scanning multiple targets (-T/--targets) (default: 32)
```
* 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.
* an exit code of 0 is returned when all algorithms are considered secure (for a standard audit), or when a policy check passes (for a policy audit).
Basic server auditing:
```
ssh-audit localhost
ssh-audit 127.0.0.1
ssh-audit 127.0.0.1:222
ssh-audit ::1
ssh-audit [::1]:222
```
To run a standard audit against many servers (place targets into servers.txt, one on each line in the format of `HOST[:PORT]`):
```
ssh-audit -T servers.txt
```
To audit a client configuration (listens on port 2222 by default; connect using `ssh -p 2222 anything@localhost`):
```
ssh-audit -c
```
To audit a client configuration, with a listener on port 4567:
```
ssh-audit -c -p 4567
```
To list all official built-in policies (hint: use resulting policy names with `-P`/`--policy`):
```
ssh-audit -L
```
To run a policy audit against a server:
```
ssh-audit -P ["policy name" | path/to/server_policy.txt] targetserver
```
To run a policy audit against a client:
```
ssh-audit -c -P ["policy name" | path/to/client_policy.txt]
```
To run a policy audit against many servers:
```
ssh-audit -T servers.txt -P ["policy name" | path/to/server_policy.txt]
```
To create a policy based on a target server (which can be manually edited):
```
ssh-audit -M new_policy.txt targetserver
```
To run the DHEat CPU exhaustion DoS attack ([CVE-2002-20001](https://nvd.nist.gov/vuln/detail/CVE-2002-20001)) against a target using 10 concurrent sockets:
```
ssh-audit --dheat=10 targetserver
```
To run the DHEat attack using the `diffie-hellman-group-exchange-sha256` key exchange algorithm:
```
ssh-audit --dheat=10:diffie-hellman-group-exchange-sha256 targetserver
```
To run the DHEat attack using the `diffie-hellman-group-exchange-sha256` key exchange algorithm along with very small but non-standard packet lengths (this may result in the same CPU exhaustion, but with many less bytes per second being sent):
```
ssh-audit --dheat=10:diffie-hellman-group-exchange-sha256:4 targetserver
```
## Screenshots
### Server Standard Audit Example
Below is a screen shot of the standard server-auditing output when connecting to an unhardened OpenSSH v5.3 service:
![screenshot](https://user-images.githubusercontent.com/2982011/64388792-317e6f80-d00e-11e9-826e-a4934769bb07.png)
### Server Policy Audit Example
Below is a screen shot of the policy auditing output when connecting to an un-hardened Ubuntu Server 20.04 machine (hint: use `-L`/`--list-policies` to see names of built-in policies to use with `-P`/`--policy`):
![screenshot](https://user-images.githubusercontent.com/2982011/94370881-95178700-00c0-11eb-8705-3157a4669dc0.png)
After applying the steps in the hardening guide (see below), the output changes to the following:
![screenshot](https://user-images.githubusercontent.com/2982011/94370873-87620180-00c0-11eb-9a59-469f61a56ce1.png)
### Client Standard Audit Example
Below is a screen shot of the client-auditing output when an unhardened OpenSSH v7.2 client connects:
![client_screenshot](https://user-images.githubusercontent.com/2982011/68867998-b946c100-06c4-11ea-975f-1f47e4178a74.png)
## Hardening Guides
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)
## Pre-Built Packages
Pre-built packages are available for Windows (see the [Releases](https://github.com/jtesta/ssh-audit/releases) page), PyPI, Snap, and Docker:
To install from PyPI:
```
$ pip3 install ssh-audit
```
To install the Snap package:
```
$ snap install ssh-audit
```
To install from Dockerhub:
```
$ docker pull positronsecurity/ssh-audit
```
(Then run with: `docker run -it --rm -p 2222:2222 positronsecurity/ssh-audit 10.1.1.1`)
The status of various other platform packages can be found below (via Repology):
<a href="https://repology.org/project/ssh-audit/versions"><img src="https://repology.org/badge/vertical-allrepos/ssh-audit.svg?columns=4" alt="Packaging status" align="center"></a>
## Web Front-End
For convenience, a web front-end on top of the command-line tool is available at [https://www.ssh-audit.com/](https://www.ssh-audit.com/).
## ChangeLog
### v3.4.0-dev
- Added warning to all key exchanges that do not include protections against quantum attacks due to the Harvest Now, Decrypt Later strategy (see https://en.wikipedia.org/wiki/Harvest_now,_decrypt_later).
- Migrated from deprecated `getopt` module to `argparse`; partial credit [oam7575](https://github.com/oam7575).
- When running against multiple hosts, now prints each target host regardless of output level.
- Batch mode (`-b`) no longer automatically enables verbose mode, due to sometimes confusing results; users can still explicitly enable verbose mode using the `-v` flag.
### v3.3.0 (2024-10-15)
- Added Python 3.13 support.
- Added built-in policies for Ubuntu 24.04 LTS server & client, OpenSSH 9.8, and OpenSSH 9.9.
- Added IPv6 support for DHEat and connection rate tests.
- Added TCP port information to JSON policy scan results; credit [Fabian Malte Kopp](https://github.com/dreizehnutters).
- Added LANcom LCOS server recognition and Ed448 key extraction; credit [Daniel Lenski](https://github.com/dlenskiSB).
- Now reports ECDSA and DSS fingerprints when in verbose mode; partial credit [Daniel Lenski](https://github.com/dlenskiSB).
- Removed CVE information based on server/client version numbers, as this was wildly inaccurate (see [this thread](https://github.com/jtesta/ssh-audit/issues/240) for the full discussion, as well as the results of the community vote on this matter).
- Fixed crash when running with `-P` and `-T` options simultaneously.
- Fixed host key tests from only reporting a key type at most once despite multiple hosts supporting it; credit [Daniel Lenski](https://github.com/dlenskiSB).
- Fixed DHEat connection rate testing on MacOS X and BSD platforms; credit [Drew Noel](https://github.com/drewmnoel) and [Michael Osipov](https://github.com/michael-o).
- Fixed invalid JSON output when a socket error occurs while performing a client audit.
- Fixed `--conn-rate-test` feature on Windows.
- When scanning multiple targets (using `-T`/`--targets`), the `-p`/`--port` option will now be used as the default port (set to 22 if `-p`/`--port` is not given). Hosts specified in the file can override this default with an explicit port number (i.e.: "host1:1234"). For example, when using `-T targets.txt -p 222`, all hosts in `targets.txt` that do not explicitly include a port number will default to 222; when using `-T targets.txt` (without `-p`), all hosts will use a default of 22.
- Updated built-in server & client policies for Amazon Linux 2023, Debian 12, Rocky Linux 9, and Ubuntu 22.04 to improve host key efficiency and cipher resistance to quantum attacks.
- Added 1 new cipher: `grasshopper-ctr128`.
- Added 2 new key exchanges: `mlkem768x25519-sha256`, `sntrup761x25519-sha512`.
### v3.2.0 (2024-04-22)
- Added implementation of the DHEat denial-of-service attack (see `--dheat` option; [CVE-2002-20001](https://nvd.nist.gov/vuln/detail/CVE-2002-20001)).
- Expanded filter of CBC ciphers to flag for the Terrapin vulnerability. It now includes more rarely found ciphers.
- Fixed parsing of `ecdsa-sha2-nistp*` CA signatures on host keys. Additionally, they are now flagged as potentially back-doored, just as standard host keys are.
- Gracefully handle rare exceptions (i.e.: crashes) while performing GEX tests.
- The built-in man page (`-m`, `--manual`) is now available on Docker, PyPI, and Snap builds, in addition to the Windows build.
- Snap builds are now architecture-independent.
- Changed Docker base image from `python:3-slim` to `python:3-alpine`, resulting in a 59% reduction in image size; credit [Daniel Thamdrup](https://github.com/dallemon).
- Added built-in policies for Amazon Linux 2023, Debian 12, OpenSSH 9.7, and Rocky Linux 9.
- Built-in policies now include a change log (use `-L -v` to view them).
- Custom policies now support the `allow_algorithm_subset_and_reordering` directive to allow targets to pass with a subset and/or re-ordered list of host keys, kex, ciphers, and MACs. This allows for the creation of a baseline policy where targets can optionally implement stricter controls; partial credit [yannik1015](https://github.com/yannik1015).
- Custom policies now support the `allow_larger_keys` directive to allow targets to pass with larger host keys, CA keys, and Diffie-Hellman keys. This allows for the creation of a baseline policy where targets can optionally implement stricter controls; partial credit [Damian Szuberski](https://github.com/szubersk).
- Color output is disabled if the `NO_COLOR` environment variable is set (see https://no-color.org/).
- Added 1 new key exchange algorithm: `gss-nistp384-sha384-*`.
- Added 1 new cipher: `
[email protected]`.
### v3.1.0 (2023-12-20)
- Added test for the Terrapin message prefix truncation vulnerability ([CVE-2023-48795](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-48795)).
- Dropped support for Python 3.7 (EOL was reached in June 2023).
- Added Python 3.12 support.
- In server policies, reduced expected DH modulus sizes from 4096 to 3072 to match the [online hardening guides](https://ssh-audit.com/hardening_guides.html) (note that 3072-bit moduli provide the equivalent of 128-bit symmetric security).
- In Ubuntu 22.04 client policy, moved host key types `
[email protected]` and `ssh-ed25519` to the end of all certificate types.
- Updated Ubuntu Server & Client policies for 20.04 and 22.04 to account for key exchange list changes due to Terrapin vulnerability patches.
- Re-organized option host key types for OpenSSH 9.2 server policy to correspond with updated Debian 12 hardening guide.
- Added built-in policies for OpenSSH 9.5 and 9.6.
- Added an `additional_notes` field to the JSON output.
### v3.0.0 (2023-09-07)
- Results from concurrent scans against multiple hosts are no longer improperly combined; bug discovered by [Adam Russell](https://github.com/thecliguy).
- Hostname resolution failure no longer causes scans against multiple hosts to terminate unexpectedly; credit [Dani Cuesta](https://github.com/daniel-cues).
- Algorithm recommendations resulting from warnings are now printed in yellow instead of red; credit [Adam Russell](https://github.com/thecliguy).
- Added failure, warning, and info notes to JSON output (note that this results in a breaking change to the banner protocol, "enc", and "mac" fields); credit [Bareq Al-Azzawi](https://github.com/BareqAZ).
- Docker Makefile now creates multi-arch builds for amd64, arm64, and armv7; credit [Sebastian Cohnen](https://github.com/tisba).
- Fixed crash during GEX tests.
- Refined GEX testing against OpenSSH servers: when the fallback mechanism is suspected of being triggered, perform an additional test to obtain more accurate results.
- The color of all notes will be printed in green when the related algorithm is rated good.
- Prioritized host key certificate algorithms for Ubuntu 22.04 LTS client policy.
- Marked all NIST K-, B-, and T-curves as unproven since they are so rarely used.
- Added built-in policy for OpenSSH 9.4.
- Added 12 new host keys: `ecdsa-sha2-curve25519`, `ecdsa-sha2-nistb233`, `ecdsa-sha2-nistb409`, `ecdsa-sha2-nistk163`, `ecdsa-sha2-nistk233`, `ecdsa-sha2-nistk283`, `ecdsa-sha2-nistk409`, `ecdsa-sha2-nistp224`, `ecdsa-sha2-nistp192`, `ecdsa-sha2-nistt571`, `ssh-dsa`, `x509v3-sign-rsa-sha256`.
- Added 15 new key exchanges: `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `kexAlgoDH14SHA1`, `kexAlgoDH1SHA1`, `kexAlgoECDH256`, `kexAlgoECDH384`, `kexAlgoECDH521`, `sm2kep-sha2-nistp256`, `
[email protected]`, `
[email protected]`.
- Added 8 new ciphers: `
[email protected]`, `cast128-12-cbc`, `cast128-12-cfb`, `cast128-12-ecb`, `cast128-12-ofb`, `des-cfb`, `des-ecb`, `des-ofb`.
- Added 14 new MACs: `cbcmac-3des`, `cbcmac-aes`, `cbcmac-blowfish`, `cbcmac-des`, `cbcmac-rijndael`, `cbcmac-twofish`, `hmac-sha256-96`, `md5`, `md5-8`, `ripemd160`, `ripemd160-8`, `sha1`, `sha1-8`, `umac-128`.
### v2.9.0 (2023-04-29)
- Dropped support for Python 3.6, as it reached EOL at the end of 2021.
- Added Ubuntu Server & Client 22.04 hardening policies.
- Removed experimental warning tag from `
[email protected]`.
- Updated CVE database; credit [Alexandre Zanni](https://github.com/noraj).
- Added `-g` and `--gex-test` for granular GEX modulus size tests; credit [Adam Russell](https://github.com/thecliguy).
- Snap packages now print more user-friendly error messages when permission errors are encountered.
- JSON 'target' field now always includes port number; credit [tomatohater1337](https://github.com/tomatohater1337).
- JSON output now includes recommendations and CVE data.
- Mixed host key/CA key types (i.e.: RSA host keys signed with ED25519 CAs, etc.) are now properly handled.
- Warnings are now printed for 2048-bit moduli; partial credit [Adam Russell](https://github.com/thecliguy).
- SHA-1 algorithms now cause failures.
- CBC mode ciphers are now warnings instead of failures.
- Generic failure/warning messages replaced with more specific reasons (i.e.: 'using weak cipher' => 'using broken RC4 cipher').
- Updated built-in policies to include missing host key size information.
- Added built-in policies for OpenSSH 8.8, 8.9, 9.0, 9.1, 9.2, and 9.3.
- Added 33 new host keys: `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `null`, `pgp-sign-dss`, `pgp-sign-rsa`, `spki-sign-dss`, `spki-sign-rsa`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `ssh-rsa-sha2-256`, `ssh-rsa-sha2-512`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `x509v3-ecdsa-sha2-1.3.132.0.10`, `x509v3-sign-dss-sha1`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `x509v3-sign-rsa-sha1`, `
[email protected]`, `
[email protected]`, `
[email protected]`.
- Added 46 new key exchanges: `
[email protected]`, `diffie-hellman_group17-sha512`, `
[email protected]`, `
[email protected]`, `ecdh-sha2-1.2.840.10045.3.1.1`, `ecdh-sha2-1.2.840.10045.3.1.7`, `ecdh-sha2-1.3.132.0.1`, `ecdh-sha2-1.3.132.0.16`, `ecdh-sha2-1.3.132.0.26`, `ecdh-sha2-1.3.132.0.27`, `ecdh-sha2-1.3.132.0.33`, `ecdh-sha2-1.3.132.0.34`, `ecdh-sha2-1.3.132.0.35`, `ecdh-sha2-1.3.132.0.36`, `ecdh-sha2-1.3.132.0.37`, `ecdh-sha2-1.3.132.0.38`, `ecdh-sha2-4MHB+NBt3AlaSRQ7MnB4cg==`, `ecdh-sha2-5pPrSUQtIaTjUSt5VZNBjg==`, `ecdh-sha2-9UzNcgwTlEnSCECZa7V1mw==`, `ecdh-sha2-D3FefCjYoJ/kfXgAyLddYA==`, `ecdh-sha2-h/SsxnLCtRBh7I9ATyeB3A==`, `ecdh-sha2-m/FtSAmrV4j/Wy6RVUaK7A==`, `ecdh-sha2-mNVwCXAoS1HGmHpLvBC94w==`, `ecdh-sha2-qCbG5Cn/jjsZ7nBeR7EnOA==`, `ecdh-sha2-qcFQaMAMGhTziMT0z+Tuzw==`, `ecdh-sha2-VqBg4QRPjxx1EXZdV0GdWQ==`, `ecdh-sha2-wiRIU8TKjMZ418sMqlqtvQ==`, `ecdh-sha2-zD/b3hu/71952ArpUG4OjQ==`, `ecmqv-sha2`, `gss-13.3.132.0.10-sha256-*`, `gss-curve25519-sha256-*`, `gss-curve448-sha512-*`, `gss-gex-sha1-*`, `gss-gex-sha256-*`, `gss-group14-sha1-*`, `gss-group14-sha256-*`, `gss-group15-sha512-*`, `gss-group16-sha512-*`, `gss-group17-sha512-*`, `gss-group18-sha512-*`, `gss-group1-sha1-*`, `gss-nistp256-sha256-*`, `gss-nistp384-sha256-*`, `gss-nistp521-sha512-*`, `
[email protected]`, `
[email protected]`.
- Added 28 new ciphers: `3des-cfb`, `3des-ecb`, `3des-ofb`, `blowfish-cfb`, `blowfish-ecb`, `blowfish-ofb`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `cast128-cfb`, `cast128-ecb`, `cast128-ofb`, `
[email protected]`, `idea-cfb`, `idea-ecb`, `idea-ofb`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `twofish-cfb`, `twofish-ecb`, `twofish-ofb`
- Added 5 new MACs: `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `hmac-whirlpool`.
### v2.5.0 (2021-08-26)
- Fixed crash when running host key tests.
- Handles server connection failures more gracefully.
- Now prints JSON with indents when `-jj` is used (useful for debugging).
- Added MD5 fingerprints to verbose output.
- Added `-d`/`--debug` option for getting debugging output; credit [Adam Russell](https://github.com/thecliguy).
- Updated JSON output to include MD5 fingerprints. Note that this results in a breaking change in the 'fingerprints' dictionary format.
- Updated OpenSSH 8.1 (and earlier) policies to include `rsa-sha2-512` and `rsa-sha2-256`.
- Added OpenSSH v8.6 & v8.7 policies.
- Added 3 new key exchanges: `gss-gex-sha1-eipGX3TCiQSrx573bT1o1Q==`, `gss-group1-sha1-eipGX3TCiQSrx573bT1o1Q==`, and `gss-group14-sha1-eipGX3TCiQSrx573bT1o1Q==`.
- Added 3 new MACs: `hmac-ripemd160-96`, `AEAD_AES_128_GCM`, and `AEAD_AES_256_GCM`.
### v2.4.0 (2021-02-23)
- Added multi-threaded scanning support.
- Added built-in Windows manual page (see `-m`/`--manual`); credit [Adam Russell](https://github.com/thecliguy).
- Added version check for OpenSSH user enumeration (CVE-2018-15473).
- Added deprecation note to host key types based on SHA-1.
- Added extra warnings for SSHv1.
- Added built-in hardened OpenSSH v8.5 policy.
- Upgraded warnings to failures for host key types based on SHA-1.
- Fixed crash when receiving unexpected response during host key test.
- Fixed hang against older Cisco devices during host key test & gex test.
- Fixed improper termination while scanning multiple targets when one target returns an error.
- Dropped support for Python 3.5 (which reached EOL in Sept. 2020).
- Added 1 new key exchange: `
[email protected]`.
### v2.3.1 (2020-10-28)
- Now parses public key sizes for `
[email protected]` and `
[email protected]` host key types.
- Flag `
[email protected]` as a failure due to SHA-1 hash.
- Fixed bug in recommendation output which suppressed some algorithms inappropriately.
- Built-in policies now include CA key requirements (if certificates are in use).
- Lookup function (`--lookup`) now performs case-insensitive lookups of similar algorithms; credit [Adam Russell](https://github.com/thecliguy).
- Migrated pre-made policies from external files to internal database.
- Split single 3,500 line script into many files (by class).
- Added setup.py support; credit [Ganden Schaffner](https://github.com/gschaffner).
- Added 1 new cipher: `
[email protected]`.
### v2.3.0 (2020-09-27)
- Added new policy auditing functionality to test adherence to a hardening guide/standard configuration (see `-L`/`--list-policies`, `-M`/`--make-policy` and `-P`/`--policy`). For an in-depth tutorial, see <https://www.positronsecurity.com/blog/2020-09-27-ssh-policy-configuration-checks-with-ssh-audit/>.
- Created new man page (see `ssh-audit.1` file).
- 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).
- Added feature to look up algorithms in internal database (see `--lookup`); credit [Adam Russell](https://github.com/thecliguy).
- Suppress recommendation of token host key types.
- Added check for use-after-free vulnerability in PuTTY v0.73.
- Added 11 new host key types: `ssh-rsa1`, `
[email protected]`, `ssh-gost2001`, `ssh-gost2012-256`, `ssh-gost2012-512`, `spki-sign-rsa`, `ssh-ed448`, `x509v3-ecdsa-sha2-nistp256`, `x509v3-ecdsa-sha2-nistp384`, `x509v3-ecdsa-sha2-nistp521`, `x509v3-rsa2048-sha256`.
- Added 8 new key exchanges: `diffie-hellman-group1-sha256`, `kexAlgoCurve25519SHA256`, `Curve25519SHA256`, `gss-group14-sha256-`, `gss-group15-sha512-`, `gss-group16-sha512-`, `gss-nistp256-sha256-`, `gss-curve25519-sha256-`.
- Added 5 new ciphers: `blowfish`, `AEAD_AES_128_GCM`, `AEAD_AES_256_GCM`, `
[email protected]`, `
[email protected]`.
- Added 3 new MACs: `
[email protected]`, `hmac-sha3-224`, `
[email protected]`.
### 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`, `
[email protected]`, `x509v3-ssh-dss`, `x509v3-ssh-rsa`, `
[email protected]`, `
[email protected]`, `
[email protected]`, and `
[email protected]`.
- Added 18 new key exchanges: `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `
[email protected]`, `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: `
[email protected]`, `
[email protected]`.
- Added 2 new ciphers: `des`, `3des`.
- Added 3 new PuTTY vulnerabilities.
- During client testing, client IP address is now listed in output.
### v2.1.0 (2019-11-14)
- Added client software auditing functionality (see `-c` / `--client-audit` option).
- Added JSON output option (see `-j` / `--json` option; credit [Andreas Jaggi](https://github.com/x-way)).
- Fixed crash while scanning Solaris Sun_SSH.
- Added 9 new key exchanges: `gss-group1-sha1-toWM5Slw5Ew8Mqkay+al2g==`, `gss-gex-sha1-toWM5Slw5Ew8Mqkay+al2g==`, `gss-group14-sha1-`, `gss-group14-sha1-toWM5Slw5Ew8Mqkay+al2g==`, `gss-group14-sha256-toWM5Slw5Ew8Mqkay+al2g==`, `gss-group15-sha512-toWM5Slw5Ew8Mqkay+al2g==`, `diffie-hellman-group15-sha256`, `ecdh-sha2-1.3.132.0.10`, `curve448-sha512`.
- Added 1 new host key type: `ecdsa-sha2-1.3.132.0.10`.
- Added 4 new ciphers: `idea-cbc`, `serpent128-cbc`, `serpent192-cbc`, `serpent256-cbc`.
- Added 6 new MACs: `
[email protected]`, `
[email protected]`, `hmac-ripemd`, `
[email protected]`, `
[email protected]`, `
[email protected]`.
### 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: `
[email protected]`, `
[email protected]`, `
[email protected]`, `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`, `
[email protected]`, `hmac-sha512`, `
[email protected]`.
- 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
", Assign "at most 3 tags" to the expected json: {"id":"3674","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"