Ssh-2.0-cisco-1.25 | Vulnerability

SSH0: Exchanging versions - SSH-2.0-Cisco-1.25 SSH0: send SSH message: outdated is NULL server version string:SSH-2.0-Cisco-1.25

While ssh-2.0-cisco-1.25 is not a specific CVE (Common Vulnerabilities and Exposures) ID itself, it is a version string found in the protocol banner of legacy Cisco devices. Its presence on a network port is a critical indicator of vulnerability. This article explores why this specific string matters, the underlying weaknesses it represents, and how network administrators can mitigate the risks.

A: No. It is a version banner. However, it indicates the device is likely missing security patches, making it a prime target for malware or ransomware. ssh-2.0-cisco-1.25 vulnerability

The most critical contemporary vulnerability associated with Cisco SSH services is the (CVE-2023-48795), which affects various Cisco platforms including Catalyst switches and XR routers. Key Vulnerabilities for Cisco SSH

Recent advisories have highlighted a maximum-severity flaw (CVSS 10.0) in certain Cisco SSH implementations (specifically those utilizing Erlang/OTP libraries). SSH0: Exchanging versions - SSH-2

The only true fix is to upgrade the device's firmware to a modern version of Cisco IOS or IOS-XE that supports current SSH standards (SSH v2 with AES-256 and RSA 2048-bit keys or higher).

You can check the local SSH status directly from the Cisco command-line interface (CLI): Router# show ssh Use code with caution. the underlying weaknesses it represents

SSH-2.0-Cisco-1.25 is a specific version of the SSH protocol implementation developed by Cisco. It is used to establish secure connections between a client and a server, allowing administrators to remotely access and manage network devices. The "2.0" in the version string refers to the SSH protocol version 2, which is a widely used and considered secure version of the protocol.

Over globally were recently detected online with this specific banner. Main Vulnerabilities Terrapin Attack (Downgrade) and Pre-Auth RCE . Mitigation

This is a software banner identifying the SSH server running on your Cisco device. : Indicates the device is running SSH Version 2.