Vulnerability - Ssh-2.0-cisco-1.25
Many Cisco devices using the SSH stack were found to be vulnerable to the Terrapin attack .
To help evaluate the risk posture of your device,Additionally, knowing if your device is or directly exposed to the internet will help tailor the exact patch path. Share public link
In worst-case scenarios, vulnerabilities in the SSH daemon could allow for remote code execution and full control of the network device. Mitigation and Resolution Strategies
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. ssh-2.0-cisco-1.25 vulnerability
To help tailor this information to your network, please let me know:
: The flaw exists in the initial message negotiation phase before a user ever submits a password or cryptographic key.
: Refers to the version of the cryptographic application engine code compiled into the operating system. It does not map directly to the operating system's version (such as Cisco IOS 12.4 or 15.1). 2. Associated Vulnerabilities and Flaws Many Cisco devices using the SSH stack were
The attacker must know a valid username configured for RSA-based authentication and possess the corresponding public key to exploit the vulnerability.
The most effective solution is upgrading your device operating system to a modern, vendor-supported release. Upgrading replaces the underlying legacy SSH code with a secure version. Always check the Cisco Software Advisor to find the stable release for your specific hardware. Step 2: Harden SSH Configuration
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This is a 10.0 CVSS (Maximum Severity) flaw because it allows an unauthenticated attacker to execute code remotely (RCE) on the device, potentially taking full control.
Network security relies heavily on Secure Shell (SSH) for safe remote management. However, outdated protocol implementations can expose critical infrastructure to severe risks. When vulnerability scanners flag the string SSH-2.0-Cisco-1.25 , it indicates that a Cisco device is broadcasting an older, potentially vulnerable SSH software version.
The string is an SSH banner broadcast by thousands of enterprise network devices worldwide, primarily running Cisco IOS and IOS XE software. This identifier explicitly states that the device is running the Secure Shell (SSH) Version 2.0 protocol using Cisco's proprietary 1.25 software implementation module .
: The device is utilizing version 1.25 of Cisco’s internal code package for handling secure shell connections.
When a client connects to a Cisco network device via Port 22, the device transmits its software version identification string: SSH-[Protocol Version]-[Software Version]