CVE-2019-1720 Cisco Expressway Series and Cisco TelePresence Video Communication Server Denial of Service Vulnerability

Medium 6.8 Published 18 Apr 2019 Updated 21 Nov 2024

Authenticated attackers can cause a denial of service by sending crafted XML payloads to Cisco Expressway or VCS systems.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-1720?

CVE-2019-1720 is a medium-severity denial of service vulnerability in Cisco TelePresence Video Communication Server (VCS), published on 18 Apr 2019. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A vulnerability in the XML API of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to cause the CPU to increase to 100% utilization, causing a denial of service (DoS) condition on an affected system. The vulnerability is due to improper handling of the XML input. An attacker could exploit this vulnerability by sending a specifically crafted XML payload. A successful exploit could allow the attacker to exhaust CPU resources, resulting in a DoS condition until the system is manually rebooted. Software versions prior to X12.5.1 are affected.

Weakness: CWE-20

Which versions are affected by CVE-2019-1720?

It affects 1 product.

Products include Cisco Telepresence Video Communication Server.

How do I fix CVE-2019-1720?

No fix has been published for CVE-2019-1720 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-1720 being exploited?

There is no known exploitation of CVE-2019-1720 in the wild and no public exploit code.

Sources

Also known as GHSA-w82q-5jhx-c75p.