CVE-2020-3116 Cisco Webex Centers Denial of Service Vulnerability

Medium 5.5 Published 23 Sep 2020 Updated 13 Nov 2024

An attacker can cause a denial of service by tricking a user into opening a malicious UCF file in Cisco Webex Event Center.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2020-3116?

CVE-2020-3116 is a medium-severity denial of service vulnerability in Cisco Webex Meetings Online, published on 23 Sep 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

A vulnerability in the way Cisco Webex applications process Universal Communications Format (UCF) files could allow an attacker to cause a denial of service (DoS) condition. The vulnerability is due to insufficient validation of UCF media files. An attacker could exploit this vulnerability by sending a user a malicious UCF file through a link or email attachment and persuading the user to open the file with the affected software on the local system. A successful exploit would cause the application to quit unexpectedly.

Weakness: CWE-20

Which versions are affected by CVE-2020-3116?

It affects 2 products.

Products include Cisco Webex Meetings Online, Cisco Webex Meetings Server.

How do I fix CVE-2020-3116?

No fix has been published for CVE-2020-3116 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-2020-3116 being exploited?

There is no known exploitation of CVE-2020-3116 in the wild and no public exploit code.

All Cisco Webex Meetings Online vulnerabilities

Sources

Also known as GHSA-86c7-v7v4-whcp.