The SSH-2.0-Cisco-1.25 vulnerability is a security issue affecting Cisco devices that use the Secure Shell (SSH) protocol for secure remote access. This report provides an overview of the vulnerability, its impact, and recommendations for mitigation.
0 Helpful. Georg Pauwen. VIP Alumni. 02-16-2021 12:30 AM. Hello, I think the '1.25' part is the Cisco specific vendor version ID. Cisco Community SSH Terrapin Prefix Truncation Weakness - Cisco Community
Hello, Is possible to edit the default message SSH-2.0-Cisco-1.25 ?? ... Labels: NGFW Firewalls. Cisco Community ssh-2.0-cisco-1.25 vulnerability
The flaw exists in the handling of SSH protocol messages during the authentication phase. An unauthenticated, remote attacker can send specific connection protocol messages before authentication is completed.
user wants a long article about "ssh-2.0-cisco-1.25 vulnerability". I need to provide a comprehensive article covering detection, exploitation, mitigation, impact, vendor responses, real-world incidents, and security implications. To gather all necessary information efficiently, I will perform a series of searches using different keywords and perspectives. search results show various potential vulnerabilities. To gather more comprehensive information, I need to perform additional searches. I will search for "Cisco SSH vulnerability CVE-2024-20526" and "Cisco SSH vulnerability CVE-2023-20244". search results provide a good starting point. I will now structure the article to cover the technical details, vulnerability analysis, exploitation scenarios, detection methods, mitigation strategies, and risk assessment. I will cite relevant sources. search results provide a good amount of information. I'll now structure the article to cover what the banner reveals, the historical vulnerabilities, modern high-severity CVEs, real-world incidents, detection, mitigation, and risk assessment. I'll cite the sources accordingly. banner string SSH-2.0-Cisco-1.25 is frequently seen on the public internet and in corporate network scans, but it is not a specific vulnerability identifier. Instead, it is the default identification string that Cisco IOS and ASA devices send during the initial handshake of an SSH connection. The SSH-2
[Detect Banner] -> [Verify Software with Cisco Checker] -> [Apply ACLs] -> [Deploy Software Update] Step 1: Query the Internal Firmware Version
Network scanning tools like Nmap or Shodan frequently report banners such as SSH-2.0-Cisco-1.25 . Penetration testers and security analysts may mistakenly search for a “CVE-XXXX-XXXX” matching this exact string. This paper corrects that misconception and provides a practical framework for risk assessment. Georg Pauwen
To mitigate and remediate this vulnerability, Cisco has released patches and workarounds. The recommended solutions are:
But is this a critical zero-day exploit? A backdoor? A misconfiguration?
The string SSH-2.0-Cisco-1.25 is a key part of the initial handshake defined in the SSH protocol specification. When a client connects to an SSH server, the server immediately sends a human-readable identification string identifying the software version. In this specific string, SSH-2.0 indicates the protocol version, Cisco identifies the vendor, and 1.25 is a vendor-specific version string that can vary based on the device platform and software release.
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