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Path: blob/master/documentation/modules/auxiliary/scanner/ssh/ssh_version.md
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Vulnerable Application
SSH, Secure SHell, is an encrypted network protocol used to remotely interact with an Operating System at a command line level. SSH is available on most every system, including Windows, but is mainly used by *nix administrators.
This module identifies the version of SSH service in use by the server based on the server's banner. Any SSH server should return this information. It also identifies the varous cryptographic settings and vulnerabilities associated with those.
This module is tested on several different SSH services, such as:
Virtual testing environment: SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.8
github.com: SSH-2.0-babeld-38be96bcgitlab.com: SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.8
Vulnerable Ubuntu 14.04.1
The following Dockerfile can be used to create an Ubuntu 14.04.1 image with SSH running.
FROM ubuntu:14.04.1 RUN apt-get update && apt-get -y install --no-install-recommends openssh-server=1:6.6p1-2ubuntu1 openssh-client=1:6.6p1-2ubuntu1 openssh-sftp-server=1:6.6p1-2ubuntu1 RUN mkdir /var/run/sshd EXPOSE 22 CMD ["/usr/sbin/sshd","-D"]
Verification Steps
Do:
use auxiliary/scanner/ssh/ssh_versionDo:
set rhosts [ips]Do:
run
Options
EXTENDED_CHECKS
Check for cryptographic issues. Defaults to true
Scenarios
SSH-2.0 on GitHub
msf5 > use auxiliary/scanner/ssh/ssh_version msf5 auxiliary(scanner/ssh/ssh_version) > set RHOSTS github.com RHOSTS => github.com msf5 auxiliary(scanner/ssh/ssh_version) > run [*] 140.82.113.4 - Key Fingerprint: ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOMqqnkVzrm0SdG6UOoqKLsabgH5C9okWi0dh2l9GKJl [*] 140.82.113.4 - SSH server version: SSH-2.0-babeld-8405f9f3 [*] 140.82.113.4 - Server Information and Encryption ================================= Type Value Note ---- ----- ---- encryption.compression none encryption.compression zlib@openssh.com encryption.compression zlib encryption.encryption chacha20-poly1305@openssh.com encryption.encryption aes256-gcm@openssh.com encryption.encryption aes128-gcm@openssh.com encryption.encryption aes256-ctr encryption.encryption aes192-ctr encryption.encryption aes128-ctr encryption.hmac hmac-sha2-512-etm@openssh.com encryption.hmac hmac-sha2-256-etm@openssh.com encryption.hmac hmac-sha2-512 encryption.hmac hmac-sha2-256 encryption.host_key ssh-ed25519 encryption.host_key ecdsa-sha2-nistp256 Weak elliptic curve encryption.host_key rsa-sha2-512 encryption.host_key rsa-sha2-256 encryption.host_key ssh-rsa encryption.key_exchange curve25519-sha256 encryption.key_exchange curve25519-sha256@libssh.org encryption.key_exchange ecdh-sha2-nistp256 encryption.key_exchange ecdh-sha2-nistp384 encryption.key_exchange ecdh-sha2-nistp521 encryption.key_exchange diffie-hellman-group-exchange-sha256 encryption.key_exchange kex-strict-s-v00@openssh.com [*] Scanned 1 of 1 hosts (100% complete) [*] Auxiliary module execution completed
Docker image
msf5 > use auxiliary/scanner/ssh/ssh_version msf6 auxiliary(scanner/ssh/ssh_version) > set rhosts 172.17.0.2 rhosts => 172.17.0.2 msf6 auxiliary(scanner/ssh/ssh_version) > set verbose true verbose => true msf6 auxiliary(scanner/ssh/ssh_version) > run [*] 172.17.0.2 - Key Fingerprint: ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIG52hWkobwr57akGxiK6eeMN9/M5MH+sQsNPv8Mci049 [*] 172.17.0.2 - SSH server version: SSH-2.0-OpenSSH_6.6p1 Ubuntu-2ubuntu1 [+] 172.17.0.2 - Key Exchange (kex) diffie-hellman-group-exchange-sha1 is deprecated and should not be used. [+] 172.17.0.2 - Key Exchange (kex) diffie-hellman-group1-sha1 is deprecated and should not be used. [+] 172.17.0.2 - Host Key Encryption ecdsa-sha2-nistp256 uses a weak elliptic curve and should not be used. [+] 172.17.0.2 - HMAC hmac-md5 is deprecated and should not be used. [+] 172.17.0.2 - HMAC hmac-ripemd160 is deprecated and should not be used. [+] 172.17.0.2 - HMAC hmac-sha1-96 is deprecated and should not be used. [+] 172.17.0.2 - HMAC hmac-md5-96 is deprecated and should not be used. [+] 172.17.0.2 - Encryption arcfour256 is deprecated and should not be used. [+] 172.17.0.2 - Encryption arcfour128 is deprecated and should not be used. [+] 172.17.0.2 - Encryption aes128-cbc is deprecated and should not be used. [+] 172.17.0.2 - Encryption 3des-cbc is deprecated and should not be used. [+] 172.17.0.2 - Encryption blowfish-cbc is deprecated and should not be used. [+] 172.17.0.2 - Encryption cast128-cbc is deprecated and should not be used. [+] 172.17.0.2 - Encryption aes192-cbc is deprecated and should not be used. [+] 172.17.0.2 - Encryption aes256-cbc is deprecated and should not be used. [+] 172.17.0.2 - Encryption arcfour is deprecated and should not be used. [+] 172.17.0.2 - Encryption rijndael-cbc@lysator.liu.se is deprecated and should not be used. [*] 172.17.0.2 - Server Information and Encryption ================================= Type Value Note ---- ----- ---- encryption.compression none encryption.compression zlib@openssh.com encryption.encryption aes128-ctr encryption.encryption aes192-ctr encryption.encryption aes256-ctr encryption.encryption arcfour256 Deprecated encryption.encryption arcfour128 Deprecated encryption.encryption aes128-gcm@openssh.com encryption.encryption aes256-gcm@openssh.com encryption.encryption chacha20-poly1305@openssh.com encryption.encryption aes128-cbc Deprecated encryption.encryption 3des-cbc Deprecated encryption.encryption blowfish-cbc Deprecated encryption.encryption cast128-cbc Deprecated encryption.encryption aes192-cbc Deprecated encryption.encryption aes256-cbc Deprecated encryption.encryption arcfour Deprecated encryption.encryption rijndael-cbc@lysator.liu.se Deprecated encryption.hmac hmac-md5-etm@openssh.com encryption.hmac hmac-sha1-etm@openssh.com encryption.hmac umac-64-etm@openssh.com encryption.hmac umac-128-etm@openssh.com encryption.hmac hmac-sha2-256-etm@openssh.com encryption.hmac hmac-sha2-512-etm@openssh.com encryption.hmac hmac-ripemd160-etm@openssh.com encryption.hmac hmac-sha1-96-etm@openssh.com encryption.hmac hmac-md5-96-etm@openssh.com encryption.hmac hmac-md5 Deprecated encryption.hmac hmac-sha1 encryption.hmac umac-64@openssh.com encryption.hmac umac-128@openssh.com encryption.hmac hmac-sha2-256 encryption.hmac hmac-sha2-512 encryption.hmac hmac-ripemd160 Deprecated encryption.hmac hmac-ripemd160@openssh.com encryption.hmac hmac-sha1-96 Deprecated encryption.hmac hmac-md5-96 Deprecated encryption.host_key ssh-rsa encryption.host_key ssh-dss encryption.host_key ecdsa-sha2-nistp256 Weak elliptic curve encryption.host_key ssh-ed25519 encryption.key_exchange curve25519-sha256@libssh.org encryption.key_exchange ecdh-sha2-nistp256 encryption.key_exchange ecdh-sha2-nistp384 encryption.key_exchange ecdh-sha2-nistp521 encryption.key_exchange diffie-hellman-group-exchange-sha256 encryption.key_exchange diffie-hellman-group-exchange-sha1 Deprecated encryption.key_exchange diffie-hellman-group14-sha1 encryption.key_exchange diffie-hellman-group1-sha1 Deprecated fingerprint_db ssh.banner openssh.comment Ubuntu-2ubuntu1 os.cpe23 cpe:/o:canonical:ubuntu_linux:14.04 os.family Linux os.product Linux os.vendor Ubuntu os.version 14.04 service.cpe23 cpe:/a:openbsd:openssh:6.6p1 service.family OpenSSH service.product OpenSSH service.protocol ssh service.vendor OpenBSD service.version 6.6p1 [*] Scanned 1 of 1 hosts (100% complete) [*] Auxiliary module execution completed
Confirming using NMAP
Utilizing the ssh2-enum-algos NMAP script.
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-01-11 14:55 EST Nmap scan report for 172.17.0.2 Host is up (0.000099s latency). PORT STATE SERVICE VERSION 22/tcp open ssh OpenSSH 6.6p1 Ubuntu 2ubuntu1 (Ubuntu Linux; protocol 2.0) | ssh2-enum-algos: | kex_algorithms: (8) | [email protected] | ecdh-sha2-nistp256 | ecdh-sha2-nistp384 | ecdh-sha2-nistp521 | diffie-hellman-group-exchange-sha256 | diffie-hellman-group-exchange-sha1 | diffie-hellman-group14-sha1 | diffie-hellman-group1-sha1 | server_host_key_algorithms: (4) | ssh-rsa | ssh-dss | ecdsa-sha2-nistp256 | ssh-ed25519 | encryption_algorithms: (16) | aes128-ctr | aes192-ctr | aes256-ctr | arcfour256 | arcfour128 | [email protected] | [email protected] | [email protected] | aes128-cbc | 3des-cbc | blowfish-cbc | cast128-cbc | aes192-cbc | aes256-cbc | arcfour | [email protected] | mac_algorithms: (19) | [email protected] | [email protected] | [email protected] | [email protected] | [email protected] | [email protected] | [email protected] | [email protected] | [email protected] | hmac-md5 | hmac-sha1 | [email protected] | [email protected] | hmac-sha2-256 | hmac-sha2-512 | hmac-ripemd160 | [email protected] | hmac-sha1-96 | hmac-md5-96 | compression_algorithms: (2) | none |_ [email protected] Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel Service detection performed. Please report any incorrect results at https://nmap.org/submit/ . Nmap done: 1 IP address (1 host up) scanned in 0.22 seconds