Ssh-2.0-cisco-1.25 Vulnerability Extra Quality | Bonus Inside
: This is the most critical step. Immediately review Cisco's Security Advisories for affected products. Fixed software releases are typically available for download from the Cisco Software Center. It is essential to check the specific Cisco bug ID for the device in use, for example CSCvx63027.
(Not ideal – SSHv1 is insecure.)
Restrict the SSH server to use only strong ciphers and Key Exchange (KEX) algorithms. Note: This requires a relatively modern IOS version. If the hardware is too old, this command may not be supported. ssh-2.0-cisco-1.25 vulnerability
! Disable SSHv1 entirely no ip ssh version 1 ip ssh version 2
At its core, SSH-2.0-Cisco-1.25 is the protocol version string sent by Cisco's SSH server implementation. This specific identifier is typically associated with Cisco Internetwork Operating System (IOS) and Catalyst Operating System (CatOS) devices that have SSH support enabled. : This is the most critical step
Below is a practical guide to understanding, detecting, and mitigating the risk.
Because Cisco embeds this software subsystem directly into the kernel of various IOS versions, upgrading the core operating system is usually required to modify or change this identifier string. Key Historical and Modern Vulnerabilities It is essential to check the specific Cisco
A: Yes. Public Metasploit modules and Python scripts exist for CVE-2009-2879 (DoS) and downgrade attacks. Always verify any exploit in a lab before testing on production.
: The internal Cisco software version handling the SSH process.
ssh -v user@<cisco-device-ip> 2>&1 | grep "SSH-2.0-Cisco"
