Cisco TelePresence Video Communication Server and Cisco Expressway Series Server-Side Request Forgery Vulnerability

Vulnerability

A server-side request forgery (SSRF) vulnerability exists in Cisco TelePresence Video Communication Server (VCS) and Cisco Expressway Series software. The flaw is due to improper restrictions on network services in the affected software. An unauthenticated, remote attacker can exploit this vulnerability by sending malicious requests to the affected system [1]. Affected versions include all releases of Cisco TelePresence VCS and Cisco Expressway Series software; for specific release details, refer to the Cisco bug ID referenced in the advisory [1].

Exploitation

To exploit this vulnerability, an attacker needs network access to the affected system and does not require authentication. The attack is conducted by sending crafted network requests to the target. The vulnerability lies in improper restrictions on network services, meaning the attacker does not need special privileges or user interaction beyond reaching the affected service [1].

Impact

Successful exploitation allows the attacker to cause the affected system to send arbitrary network requests sourced from the compromised device. This can lead to information disclosure or further network reconnaissance, as the attacker can make the system interact with internal or external resources [1].

Mitigation

Cisco has released fixed software versions to address this vulnerability. For information about fixed releases, consult the Cisco bug ID(s) at the top of the advisory. No workarounds are available [1]. Users should upgrade to a patched release as soon as possible.