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447 lines
32 KiB
Markdown
447 lines
32 KiB
Markdown
# ssh-audit
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[](https://github.com/jtesta/ssh-audit/blob/master/LICENSE)
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[](https://github.com/jtesta/ssh-audit/actions)
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[](https://github.com/jtesta/ssh-audit/blob/master/CONTRIBUTING.md)
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[](https://pypi.org/project/ssh-audit/)
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[](https://formulae.brew.sh/formula/ssh-audit)
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[](https://hub.docker.com/r/positronsecurity/ssh-audit)
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[](https://snapcraft.io/ssh-audit)
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[](https://github.com/sponsors/jtesta)
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**ssh-audit** is a tool for ssh server & client configuration auditing.
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[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.
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- [Features](#features)
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- [Usage](#usage)
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- [Screenshots](#screenshots)
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- [Server Standard Audit Example](#server-standard-audit-example)
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- [Server Policy Audit Example](#server-policy-audit-example)
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- [Client Standard Audit Example](#client-standard-audit-example)
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- [Hardening Guides](#hardening-guides)
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- [Pre-Built Packages](#pre-built-packages)
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- [Web Front-End](#web-front-end)
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- [ChangeLog](#changelog)
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## Features
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- SSH1 and SSH2 protocol server support;
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- analyze SSH client configuration;
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- grab banner, recognize device or software and operating system, detect compression;
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- gather key-exchange, host-key, encryption and message authentication code algorithms;
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- output algorithm security information (available since, removed/disabled, unsafe/weak/legacy, etc);
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- output algorithm recommendations (append or remove based on recognized software version);
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- analyze SSH version compatibility based on algorithm information;
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- historical information from OpenSSH, Dropbear SSH and libssh;
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- policy scans to ensure adherence to a hardened/standard configuration;
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- runs on Linux and Windows;
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- supports Python 3.8 - 3.13;
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- no dependencies
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## Usage
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```
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usage: ssh-audit.py [options] <host>
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-h, --help print this help
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-1, --ssh1 force ssh version 1 only
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-2, --ssh2 force ssh version 2 only
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-4, --ipv4 enable IPv4 (order of precedence)
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-6, --ipv6 enable IPv6 (order of precedence)
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-b, --batch batch output
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-c, --client-audit starts a server on port 2222 to audit client
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software config (use -p to change port;
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use -t to change timeout)
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--conn-rate-test=N[:max_rate] perform a connection rate test (useful
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for collecting metrics related to
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susceptibility of the DHEat vuln).
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Testing is conducted with N concurrent
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sockets with an optional maximum rate
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of connections per second.
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-d, --debug Enable debug output.
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--dheat=N[:kex[:e_len]] continuously perform the DHEat DoS attack
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(CVE-2002-20001) against the target using N
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concurrent sockets. Optionally, a specific
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key exchange algorithm can be specified
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instead of allowing it to be automatically
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chosen. Additionally, a small length of
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the fake e value sent to the server can
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be chosen for a more efficient attack (such
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as 4).
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-g, --gex-test=<x[,y,...]> dh gex modulus size test
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<min1:pref1:max1[,min2:pref2:max2,...]>
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<x-y[:step]>
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-j, --json JSON output (use -jj to enable indents)
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-l, --level=<level> minimum output level (info|warn|fail)
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-L, --list-policies list all the official, built-in policies. Use with -v
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to view policy change logs.
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--lookup=<alg1,alg2,...> looks up an algorithm(s) without
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connecting to a server
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-m, --manual print the man page (Docker, PyPI, Snap, and Windows
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builds only)
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-M, --make-policy=<policy.txt> creates a policy based on the target server
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(i.e.: the target server has the ideal
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configuration that other servers should
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adhere to)
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-n, --no-colors disable colors
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-p, --port=<port> port to connect
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-P, --policy=<"policy name" | policy.txt> run a policy test using the
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specified policy
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--skip-rate-test skip the connection rate test during standard audits
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(used to safely infer whether the DHEat attack
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is viable)
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-t, --timeout=<secs> timeout (in seconds) for connection and reading
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(default: 5)
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-T, --targets=<hosts.txt> a file containing a list of target hosts (one
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per line, format HOST[:PORT]). Use -p/--port
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to set the default port for all hosts. Use
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--threads to control concurrent scans.
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--threads=<threads> number of threads to use when scanning multiple
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targets (-T/--targets) (default: 32)
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-v, --verbose verbose output
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```
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* if both IPv4 and IPv6 are used, order of precedence can be set by using either `-46` or `-64`.
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* batch flag `-b` will output sections without header and without empty lines (implies verbose flag).
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* verbose flag `-v` will prefix each line with section type and algorithm name.
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* 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).
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Basic server auditing:
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```
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ssh-audit localhost
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ssh-audit 127.0.0.1
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ssh-audit 127.0.0.1:222
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ssh-audit ::1
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ssh-audit [::1]:222
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```
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To run a standard audit against many servers (place targets into servers.txt, one on each line in the format of `HOST[:PORT]`):
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```
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ssh-audit -T servers.txt
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```
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To audit a client configuration (listens on port 2222 by default; connect using `ssh -p 2222 anything@localhost`):
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```
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ssh-audit -c
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```
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To audit a client configuration, with a listener on port 4567:
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```
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ssh-audit -c -p 4567
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```
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To list all official built-in policies (hint: use resulting policy names with `-P`/`--policy`):
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```
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ssh-audit -L
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```
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To run a policy audit against a server:
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```
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ssh-audit -P ["policy name" | path/to/server_policy.txt] targetserver
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```
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To run a policy audit against a client:
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```
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ssh-audit -c -P ["policy name" | path/to/client_policy.txt]
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```
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To run a policy audit against many servers:
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```
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ssh-audit -T servers.txt -P ["policy name" | path/to/server_policy.txt]
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```
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To create a policy based on a target server (which can be manually edited):
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```
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ssh-audit -M new_policy.txt targetserver
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```
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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:
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```
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ssh-audit --dheat=10 targetserver
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```
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To run the DHEat attack using the `diffie-hellman-group-exchange-sha256` key exchange algorithm:
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```
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ssh-audit --dheat=10:diffie-hellman-group-exchange-sha256 targetserver
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```
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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):
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```
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ssh-audit --dheat=10:diffie-hellman-group-exchange-sha256:4 targetserver
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```
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## Screenshots
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### Server Standard Audit Example
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Below is a screen shot of the standard server-auditing output when connecting to an unhardened OpenSSH v5.3 service:
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### Server Policy Audit Example
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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`):
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After applying the steps in the hardening guide (see below), the output changes to the following:
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### Client Standard Audit Example
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Below is a screen shot of the client-auditing output when an unhardened OpenSSH v7.2 client connects:
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## Hardening Guides
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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)
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## Pre-Built Packages
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Pre-built packages are available for Windows (see the [Releases](https://github.com/jtesta/ssh-audit/releases) page), PyPI, Snap, and Docker:
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To install from PyPI:
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```
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$ pip3 install ssh-audit
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```
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To install the Snap package:
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```
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$ snap install ssh-audit
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```
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To install from Dockerhub:
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```
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$ docker pull positronsecurity/ssh-audit
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```
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(Then run with: `docker run -it --rm -p 2222:2222 positronsecurity/ssh-audit 10.1.1.1`)
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The status of various other platform packages can be found below (via Repology):
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<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>
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## Web Front-End
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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/).
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## ChangeLog
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### v3.3.0-dev (???)
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- Added Python 3.13 support.
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- Added built-in policies for Ubuntu 24.04 LTS server & client, OpenSSH 9.8, and OpenSSH 9.9.
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- Added IPv6 support for DHEat and connection rate tests.
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- Added TCP port information to JSON policy scan results; credit [Fabian Malte Kopp](https://github.com/dreizehnutters).
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- Added LANcom LCOS server recognition and Ed448 key extraction; credit [Daniel Lenski](https://github.com/dlenskiSB).
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- 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).
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- Fixed crash when running with `-P` and `-T` options simultaneously.
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- 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).
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- 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).
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- Fixed invalid JSON output when a socket error occurs while performing a client audit.
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- 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.
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- Now reports ECDSA and DSS fingerprints when in verbose mode; partial credit [Daniel Lenski](https://github.com/dlenskiSB).
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- Added 1 new cipher: `grasshopper-ctr128`.
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- Added 2 new key exchanges: `mlkem768x25519-sha256`, `sntrup761x25519-sha512`.
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### v3.2.0 (2024-04-22)
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- Added implementation of the DHEat denial-of-service attack (see `--dheat` option; [CVE-2002-20001](https://nvd.nist.gov/vuln/detail/CVE-2002-20001)).
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- Expanded filter of CBC ciphers to flag for the Terrapin vulnerability. It now includes more rarely found ciphers.
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- 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.
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- Gracefully handle rare exceptions (i.e.: crashes) while performing GEX tests.
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- The built-in man page (`-m`, `--manual`) is now available on Docker, PyPI, and Snap builds, in addition to the Windows build.
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- Snap builds are now architecture-independent.
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- 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).
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- Added built-in policies for Amazon Linux 2023, Debian 12, OpenSSH 9.7, and Rocky Linux 9.
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- Built-in policies now include a change log (use `-L -v` to view them).
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- 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).
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- 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).
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- Color output is disabled if the `NO_COLOR` environment variable is set (see https://no-color.org/).
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- Added 1 new key exchange algorithm: `gss-nistp384-sha384-*`.
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- Added 1 new cipher: `aes128-ocb@libassh.org`.
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### v3.1.0 (2023-12-20)
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- Added test for the Terrapin message prefix truncation vulnerability ([CVE-2023-48795](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-48795)).
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- Dropped support for Python 3.7 (EOL was reached in June 2023).
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- Added Python 3.12 support.
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- 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).
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- In Ubuntu 22.04 client policy, moved host key types `sk-ssh-ed25519@openssh.com` and `ssh-ed25519` to the end of all certificate types.
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- Updated Ubuntu Server & Client policies for 20.04 and 22.04 to account for key exchange list changes due to Terrapin vulnerability patches.
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- Re-organized option host key types for OpenSSH 9.2 server policy to correspond with updated Debian 12 hardening guide.
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- Added built-in policies for OpenSSH 9.5 and 9.6.
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- Added an `additional_notes` field to the JSON output.
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### v3.0.0 (2023-09-07)
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- Results from concurrent scans against multiple hosts are no longer improperly combined; bug discovered by [Adam Russell](https://github.com/thecliguy).
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- Hostname resolution failure no longer causes scans against multiple hosts to terminate unexpectedly; credit [Dani Cuesta](https://github.com/daniel-cues).
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- Algorithm recommendations resulting from warnings are now printed in yellow instead of red; credit [Adam Russell](https://github.com/thecliguy).
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- 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).
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- Docker Makefile now creates multi-arch builds for amd64, arm64, and armv7; credit [Sebastian Cohnen](https://github.com/tisba).
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- Fixed crash during GEX tests.
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- Refined GEX testing against OpenSSH servers: when the fallback mechanism is suspected of being triggered, perform an additional test to obtain more accurate results.
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- The color of all notes will be printed in green when the related algorithm is rated good.
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- Prioritized host key certificate algorithms for Ubuntu 22.04 LTS client policy.
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- Marked all NIST K-, B-, and T-curves as unproven since they are so rarely used.
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- Added built-in policy for OpenSSH 9.4.
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- 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`.
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- Added 15 new key exchanges: `curve448-sha512@libssh.org`, `ecdh-nistp256-kyber-512r3-sha256-d00@openquantumsafe.org`, `ecdh-nistp384-kyber-768r3-sha384-d00@openquantumsafe.org`, `ecdh-nistp521-kyber-1024r3-sha512-d00@openquantumsafe.org`, `ecdh-sha2-brainpoolp256r1@genua.de`, `ecdh-sha2-brainpoolp384r1@genua.de`, `ecdh-sha2-brainpoolp521r1@genua.de`, `kexAlgoDH14SHA1`, `kexAlgoDH1SHA1`, `kexAlgoECDH256`, `kexAlgoECDH384`, `kexAlgoECDH521`, `sm2kep-sha2-nistp256`, `x25519-kyber-512r3-sha256-d00@amazon.com`, `x25519-kyber512-sha512@aws.amazon.com`.
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- Added 8 new ciphers: `aes192-gcm@openssh.com`, `cast128-12-cbc`, `cast128-12-cfb`, `cast128-12-ecb`, `cast128-12-ofb`, `des-cfb`, `des-ecb`, `des-ofb`.
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- 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`.
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### v2.9.0 (2023-04-29)
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- Dropped support for Python 3.6, as it reached EOL at the end of 2021.
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- Added Ubuntu Server & Client 22.04 hardening policies.
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- Removed experimental warning tag from `sntrup761x25519-sha512@openssh.com`.
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- Updated CVE database; credit [Alexandre Zanni](https://github.com/noraj).
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- Added `-g` and `--gex-test` for granular GEX modulus size tests; credit [Adam Russell](https://github.com/thecliguy).
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- Snap packages now print more user-friendly error messages when permission errors are encountered.
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- JSON 'target' field now always includes port number; credit [tomatohater1337](https://github.com/tomatohater1337).
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- JSON output now includes recommendations and CVE data.
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- Mixed host key/CA key types (i.e.: RSA host keys signed with ED25519 CAs, etc.) are now properly handled.
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- Warnings are now printed for 2048-bit moduli; partial credit [Adam Russell](https://github.com/thecliguy).
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- SHA-1 algorithms now cause failures.
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- CBC mode ciphers are now warnings instead of failures.
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- Generic failure/warning messages replaced with more specific reasons (i.e.: 'using weak cipher' => 'using broken RC4 cipher').
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- Updated built-in policies to include missing host key size information.
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- Added built-in policies for OpenSSH 8.8, 8.9, 9.0, 9.1, 9.2, and 9.3.
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- Added 33 new host keys: `dsa2048-sha224@libassh.org`, `dsa2048-sha256@libassh.org`, `dsa3072-sha256@libassh.org`, `ecdsa-sha2-1.3.132.0.10-cert-v01@openssh.com`, `eddsa-e382-shake256@libassh.org`, `eddsa-e521-shake256@libassh.org`, `null`, `pgp-sign-dss`, `pgp-sign-rsa`, `spki-sign-dss`, `spki-sign-rsa`, `ssh-dss-sha224@ssh.com`, `ssh-dss-sha384@ssh.com`, `ssh-dss-sha512@ssh.com`, `ssh-ed448-cert-v01@openssh.com`, `ssh-rsa-sha224@ssh.com`, `ssh-rsa-sha2-256`, `ssh-rsa-sha2-512`, `ssh-rsa-sha384@ssh.com`, `ssh-rsa-sha512@ssh.com`, `ssh-xmss-cert-v01@openssh.com`, `ssh-xmss@openssh.com`, `webauthn-sk-ecdsa-sha2-nistp256@openssh.com`, `x509v3-ecdsa-sha2-1.3.132.0.10`, `x509v3-sign-dss-sha1`, `x509v3-sign-dss-sha224@ssh.com`, `x509v3-sign-dss-sha256@ssh.com`, `x509v3-sign-dss-sha384@ssh.com`, `x509v3-sign-dss-sha512@ssh.com`, `x509v3-sign-rsa-sha1`, `x509v3-sign-rsa-sha224@ssh.com`, `x509v3-sign-rsa-sha384@ssh.com`, `x509v3-sign-rsa-sha512@ssh.com`.
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- Added 46 new key exchanges: `diffie-hellman-group14-sha224@ssh.com`, `diffie-hellman_group17-sha512`, `diffie-hellman-group-exchange-sha224@ssh.com`, `diffie-hellman-group-exchange-sha384@ssh.com`, `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-*`, `m383-sha384@libassh.org`, `m511-sha512@libassh.org`.
|
|
- Added 28 new ciphers: `3des-cfb`, `3des-ecb`, `3des-ofb`, `blowfish-cfb`, `blowfish-ecb`, `blowfish-ofb`, `camellia128-cbc@openssh.org`, `camellia128-ctr@openssh.org`, `camellia192-cbc@openssh.org`, `camellia192-ctr@openssh.org`, `camellia256-cbc@openssh.org`, `camellia256-ctr@openssh.org`, `cast128-cfb`, `cast128-ecb`, `cast128-ofb`, `cast128-12-cbc@ssh.com`, `idea-cfb`, `idea-ecb`, `idea-ofb`, `rijndael-cbc@ssh.com`, `seed-ctr@ssh.com`, `serpent128-gcm@libassh.org`, `serpent256-gcm@libassh.org`, `twofish128-gcm@libassh.org`, `twofish256-gcm@libassh.org`, `twofish-cfb`, `twofish-ecb`, `twofish-ofb`
|
|
- Added 5 new MACs: `hmac-sha1-96@openssh.com`, `hmac-sha224@ssh.com`, `hmac-sha256-2@ssh.com`, `hmac-sha384@ssh.com`, `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: `sntrup761x25519-sha512@openssh.com`.
|
|
|
|
### v2.3.1 (2020-10-28)
|
|
- Now parses public key sizes for `rsa-sha2-256-cert-v01@openssh.com` and `rsa-sha2-512-cert-v01@openssh.com` host key types.
|
|
- Flag `ssh-rsa-cert-v01@openssh.com` 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: `des-cbc@ssh.com`.
|
|
|
|
### 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`, `ssh-dss-sha256@ssh.com`, `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`, `crypticore128@ssh.com`, `seed-cbc@ssh.com`.
|
|
- Added 3 new MACs: `chacha20-poly1305@openssh.com`, `hmac-sha3-224`, `crypticore-mac@ssh.com`.
|
|
|
|
### 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`.
|
|
- 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: `hmac-sha2-256-96-etm@openssh.com`, `hmac-sha2-512-96-etm@openssh.com`, `hmac-ripemd`, `hmac-sha256-96@ssh.com`, `umac-32@openssh.com`, `umac-96@openssh.com`.
|
|
|
|
### 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: `sntrup4591761x25519-sha512@tinyssh.org`, `diffie-hellman-group-exchange-sha256@ssh.com`, `diffie-hellman-group-exchange-sha512@ssh.com`, `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`, `hmac-sha256@ssh.com`, `hmac-sha512`, `hmac-512@ssh.com`.
|
|
- 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
|