likekabin/cve-2018-10933-libssh-authentication-bypassExploit tool for CVE-2018-10933 libSSH authentication bypass, enabling remote shell access without credentials using Python scripts and optional fake SSH keys.
Spawn to shell without any credentials by using CVE-2018-10933
Information about CVE-2018-10933 by libSSH : https://www.libssh.org/security/advisories/CVE-2018-10933.txt
Bugfix Release by libSSH : https://www.libssh.org/2018/10/16/libssh-0-8-4-and-0-7-6-security-and-bugfix-release/
https://gist.github.com/0x4D31/35ddb0322530414bbb4c3288292749cc
https://help.github.com/articles/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent/
Important : "People trying to reproduce libssh bug: the sample code (samplesshd-cb) is not vuln because it has explicit auth handlers. You can open a channel but nothing will happen."
As we can see this section is just for opening channel. You can't spawn to a shell in server that ran by "samplesshd-cb"
It's just for opening channel. PoCs that i wrote is just for remote hosts.
Download, uncompress and build the vulnerable libSSH Version : https://www.libssh.org/files/0.7/libssh-0.7.4.tar.xz
And then compile and run libSSH on your own server with ssh.
PWD: /libssh-0.7.4/build/examples/samplesshd-cb
./samplesshd-cb --dsakey==yourdsakey 127.0.0.1 --port=2222
If you have got any fake ssh keys use the second bypasswithfakekey.py
pip install -r requirements.txt
If paramiko==2.0.8 doesn't works try : pip install paramiko==2.4.2
python libsshauthbypass.py --help
python bypasswithfakekey.py --help
