Cisco Meeting Server H.264 Protocol Denial of Service Vulnerability

A vulnerability in the implementation of the H.264 protocol in Cisco Meeting Server (CMS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected system.

The vulnerability exists because the affected application does not properly validate Fragmentation Unit (FU-A) protocol packets. An attacker could exploit this vulnerability by sending a crafted H.264 FU-A packet through the affected application. A successful exploit could allow the attacker to cause a DoS condition on the affected system due to an unexpected restart of the CMS media process on the system. Although the CMS platform continues to operate and only the single, affected CMS media process is restarted, a brief interruption of media traffic for certain users could occur.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
http://ift.tt/2wlXvNd A vulnerability in the implementation of the H.264 protocol in Cisco Meeting Server (CMS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected system.

The vulnerability exists because the affected application does not properly validate Fragmentation Unit (FU-A) protocol packets. An attacker could exploit this vulnerability by sending a crafted H.264 FU-A packet through the affected application. A successful exploit could allow the attacker to cause a DoS condition on the affected system due to an unexpected restart of the CMS media process on the system. Although the CMS platform continues to operate and only the single, affected CMS media process is restarted, a brief interruption of media traffic for certain users could occur.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
http://ift.tt/2wlXvNd
Security Impact Rating: Medium
CVE: CVE-2017-6763

from Cisco Security Advisory http://ift.tt/2wlXvNd