Ssh-2.0-cisco-1.25 Vulnerability | Plus |

Step 1: Restrict Management Access (Control Plane Protection)

The SSH-2.0-Cisco-1.25 vulnerability affects certain versions of Cisco's SSH implementation, including:

Providing the hardware type can help narrow down the exact patch you need. ssh-2.0-cisco-1.25 vulnerability

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.

: If an attacker knew a valid local username configured for RSA authentication, a flaw in how the SSH engine parsed the key allowed entry without validating ownership of the matching private key. : If an attacker knew a valid local

To secure a system displaying the SSH-2.0-Cisco-1.25 banner, network administrators must follow a multi-layered hardening strategy.

First, you must know which of your devices are running the SSH-2.0-Cisco-1.25 banner or similar vulnerable implementations. Network scanners and configuration management tools can help. Network scanners and configuration management tools can help

Recent reports have identified a critical vulnerability (CVSS 10.0) in certain Cisco products using the Erlang/OTP SSH implementation. It allows unauthenticated remote code execution by sending connection protocol messages before authentication occurs.

Look for SSH-2.0-Cisco-1.25 and then check supported KEX/algorithms. Older banners often still allow diffie-hellman-group1-sha1 (weak).