Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulnerabilities

Vulnerability

Multiple vulnerabilities exist in Cisco Webex Network Recording Player for Microsoft Windows and Cisco Webex Player for Microsoft Windows (versions prior to the fixed releases). The flaws are due to insufficient validation of certain elements within a Webex recording stored in either the Advanced Recording Format (ARF) or the Webex Recording Format (WRF). This allows an attacker to craft a malicious ARF or WRF file that, when opened, triggers arbitrary code execution [1].

Exploitation

An attacker can exploit these vulnerabilities by sending a malicious ARF or WRF file to a user through a link or email attachment and persuading the user to open the file on the local system [1]. No additional authentication or network position other than the user's interaction is required.

Impact

Successful exploitation allows the attacker to execute arbitrary code on the affected system with the privileges of the targeted user [1]. This typically leads to full compromise of the user's session and data, including potential for lateral movement depending on the environment.

Mitigation

Cisco has released free software updates to address these vulnerabilities. Customers are advised to upgrade to the fixed versions as specified in the Cisco Security Advisory [1]. No workarounds are available; the only mitigation is to apply the patch. Users should avoid opening ARF or WRF files from untrusted sources.