CVE-2022-20755 Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities

Critical 9.0 Published 6 Apr 2022 Updated 6 Nov 2024

Authenticated attackers can exploit path traversal to write files and execute arbitrary code as root on Cisco Expressway and VCS devices.

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-2022-20755?

CVE-2022-20755 is a critical path traversal vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway, published on 6 Apr 2022. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Multiple vulnerabilities in the API and web-based management interfaces of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker with read/write privileges to the application to write files or execute arbitrary code on the underlying operating system of an affected device as the root user. For more information about these vulnerabilities, see the Details section of this advisory.

Weakness: CWE-23

Which versions are affected by CVE-2022-20755?

It affects 1 product.

Products include Cisco Telepresence Video Communication Server.

How do I fix CVE-2022-20755?

No fix has been published for CVE-2022-20755 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2022-20755 being exploited?

There is no known exploitation of CVE-2022-20755 in the wild and no public exploit code.

Sources

Also known as GHSA-r28m-fphr-v4pf.