Ssh-2.0-cisco-1.25 Vulnerability Best

This banner typically indicates a Cisco device running an outdated SSH server implementation (likely from an older IOS release). The actual vulnerability most often associated with this banner is (and related issues like CVE-2009-4408), which concerns a weakness in Cisco’s SSH v2 implementation.

The string SSH-2.0-Cisco-1.25 is not a vulnerability itself, but rather the identifying a Cisco device's SSH service. Because this banner reveals the specific vendor and version, security scanners often flag it to suggest checking for known vulnerabilities associated with Cisco's SSH implementation. ssh-2.0-cisco-1.25 vulnerability

The real vulnerabilities behind similar banners This banner typically indicates a Cisco device running

: Confirms that the target device uses the Secure Shell Version 2 framework. Cisco : Identifies the device vendor. Because this banner reveals the specific vendor and

The vulnerability is caused by a buffer overflow condition in the Cisco SSH implementation. When a client attempts to authenticate using keyboard-interactive authentication, the server does not properly validate the length of the authentication request. This allows an attacker to send a specially crafted request that overflows the buffer, potentially allowing the attacker to execute arbitrary code on the server.

While a banner itself is not a flaw, exposing SSH-2.0-Cisco-1.25 allows attackers to fingerprint the device. Network scanning engines like Shodan and Censys have indexed hundreds of thousands of internet-facing devices broadcasting this exact banner, identifying them as potential targets for multiple critical SSH-related vulnerabilities. Anatomy of the Vulnerabilities Affecting Cisco-1.25

A widespread risk for unpatched infrastructure nodes involves standard buffer and state-tracking problems in the network stack.