Cisco Webex Player Memory Corruption Vulnerability

Vulnerability

A memory corruption vulnerability exists in Cisco Webex Player for Windows and MacOS due to insufficient validation of values in Webex Recording Format (WRF) files [1]. Affected versions include Cisco Webex Player releases prior to the fixed versions detailed in the vendor advisory [1]. The vulnerability is triggered when a user opens a specially crafted WRF file with the affected software.

Exploitation

An attacker can exploit this vulnerability by sending a malicious WRF file to a target user via a link or email attachment and persuading the user to open the file with Cisco Webex Player on a Windows or MacOS system [1]. No additional authentication or special network position is required beyond the ability to deliver the file and convince the user to open it.

Impact

Successful exploitation allows the attacker to execute arbitrary code on the affected system with the privileges of the targeted user [1]. This can lead to complete compromise of the user's session, including data access, installation of programs, or further system control.

Mitigation

Cisco has released free software updates that address this vulnerability [1]. Users should upgrade to the fixed versions specified in the Cisco Security Advisory [1]. No workarounds are available; users are advised to avoid opening WRF files from untrusted sources until the update is applied.