CVE-2019-1636 Cisco Webex Teams URI Handler Insecure Library Loading Vulnerability

High 7.8 Published 23 Jan 2019 Updated 20 Nov 2024

An attacker can execute arbitrary commands by tricking a user into clicking a malicious link that triggers insecure library loading in Cisco Webex Teams.

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-2019-1636?

CVE-2019-1636 is a high-severity code injection vulnerability in Cisco Webex Teams, published on 23 Jan 2019. 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 Cisco Webex Teams client, formerly Cisco Spark, could allow an attacker to execute arbitrary commands on a targeted system. This vulnerability is due to unsafe search paths used by the application URI that is defined in Windows operating systems. An attacker could exploit this vulnerability by convincing a targeted user to follow a malicious link. Successful exploitation could cause the application to load libraries from the directory targeted by the URI link. The attacker could use this behavior to execute arbitrary commands on the system with the privileges of the targeted user if the attacker can place a crafted library in a directory that is accessible to the vulnerable system.

Weakness: CWE-78

Which versions are affected by CVE-2019-1636?

It affects 1 product.

Products include Cisco Webex Teams.

How do I fix CVE-2019-1636?

No fix has been published for CVE-2019-1636 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-2019-1636 being exploited?

There is no known exploitation of CVE-2019-1636 in the wild and no public exploit code.

Sources

Also known as GHSA-wrf3-rqxm-457j.