Highlights and Updates

Elevation of Privilege Vulnerability Found in Cisco WebEx Meetings

Wednesday, 27th February 2019

A vulnerability found in the update service of the Cisco Webex Meetings Desktop App for Windows could allow an unprivileged local attacker to elevate privileges and run arbitrary commands using the SYSTEM user privileges.

This vulnerability affects all Cisco Webex Meetings Desktop App releases between 33.6.4.15 and 33.8.2.7, with prior versions probably being affected by this security issue too, but they were not checked.

The vulnerability tracked as CVE-2019-1674 is an OS Command Injection found by the SecureAuth researchers, who describe it as a "bypass to avoid the new controls" put in place by Cisco after patching a previously found a DLL hijacking issue in the same application and tracked as CVE-2018-15442.

The CVE-2019-1674 vulnerability stems from the inability of the Cisco Webex Meetings Desktop App's update service to "properly validate version numbers of new files. So, an unprivileged local attacker could exploit this vulnerability by invoking the update service command with a crafted argument and folder."