CVE-2020-3495 Cisco Jabber for Windows Message Handling Arbitrary Code Execution Vulnerability

Critical 9.9 Published 4 Sep 2020 Updated 13 Nov 2024

An authenticated remote attacker can execute arbitrary code on a user's system by sending crafted XMPP messages to the Cisco Jabber Windows client.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-3495?

CVE-2020-3495 is a critical code injection vulnerability in Cisco Jabber, published on 4 Sep 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability in Cisco Jabber for Windows could allow an authenticated, remote attacker to execute arbitrary code. The vulnerability is due to improper validation of message contents. An attacker could exploit this vulnerability by sending specially crafted Extensible Messaging and Presence Protocol (XMPP) messages to the affected software. A successful exploit could allow the attacker to cause the application to execute arbitrary programs on the targeted system with the privileges of the user account that is running the Cisco Jabber client software, possibly resulting in arbitrary code execution.

Weakness: CWE-20

Which versions are affected by CVE-2020-3495?

It affects 1 product.

Products include Cisco Jabber.

How do I fix CVE-2020-3495?

No fix has been published for CVE-2020-3495 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2020-3495 being exploited?

There is no known exploitation of CVE-2020-3495 in the wild and no public exploit code.

Sources

Also known as GHSA-fgm2-2fhw-x8fx.