Ssh-2.0-cisco-1.25 Vulnerability Fix -
The most common critical finding for this specific version is the preference for the key exchange.
Modern Cisco IOS versions allow you to explicitly define secure encryption algorithms: ssh-2.0-cisco-1.25 vulnerability
Banner strings alone are — they are version identifiers that an attacker might use to infer whether a host is running a version known to have vulnerabilities. The most common critical finding for this specific
| Risk Factor | Rating | Justification | | :--- | :--- | :--- | | | High | Weak encryption allows traffic decryption via MitM attacks. | | Integrity | High | Weak key exchange algorithms allow data manipulation. | | Availability | Medium | Potential for DoS via handshake exploitation. | | Attack Complexity | Medium | Requires access to the network path (MitM) or valid credentials (downgrade attacks). | | | Integrity | High | Weak key
However, this banner serves as an accurate "marker" for several categories of older, potentially vulnerable Cisco devices. The security risk is not the string itself, but the age, configuration, and patch level of the device that displays it. A device running an SSH server that identifies as version 1.25 is highly likely to be running a legacy software release that, in turn, is vulnerable to any of the numerous Cisco SSH-related CVEs that have been published over the last two decades.
Network management frameworks should never sit wide open to public networks. Restrict all inbound traffic targeting TCP Port 22. Würth Phoenix
