An attacker must have valid administrative credentials. Crucially, even read-only accounts can exploit this flaw.
The SSH-2-Cisco-125 vulnerability is a type of remote code execution (RCE) vulnerability, which allows an attacker to execute arbitrary code on a vulnerable device without authentication. This vulnerability exists due to a flawed implementation of the SSH protocol in the Cisco device's firmware. ssh20cisco125 vulnerability
The vulnerabilities affected a wide range of Cisco IOS release trains that supported the SSH server functionality, including: An attacker must have valid administrative credentials
While the string "ssh20cisco125" does not map exactly to a standard CVE ID, it closely resembles shorthand for or the subsequent disclosure of hardcoded credentials (often discussed alongside CVE-2024-20353 ). These vulnerabilities specifically targeted the SSH management interface of Cisco devices, including the ISR 1000 series (often abbreviated as "12" or "125" in conversation) and others. This vulnerability exists due to a flawed implementation
If upgrading or disabling SSH is not possible, administrators can implement the following workarounds:
: The Cisco SSH server code fails to validate the proper sequence of inbound packets. If an attacker constructs an unexpected or malformed traffic pattern during the key exchange, the internal state engine becomes unsynchronized.
