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. The affected software improperly validates Advanced Recording Format (ARF) and Webex Recording Format (WRF) files. This flaw allows an attacker to craft a malicious ARF or WRF file that triggers arbitrary code execution upon parsing. The vulnerabilities affect versions prior to the fixed releases specified in Cisco Security Advisory cisco-sa-20190807-webex-player [1].

Exploitation

An attacker can exploit these vulnerabilities by delivering a malicious ARF or WRF file to a user, typically via a link or email attachment. The attacker must then persuade the user to open the file with the affected Cisco Webex Player software on a local Windows system [1]. No additional privileges or network access are required beyond the user-initiated file open action.

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 account and system, including data theft, installation of malware, or further lateral movement within the network.

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; applying the update is the only mitigation. The advisory does not indicate inclusion in the CISA Known Exploited Vulnerabilities catalog.