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

Vulnerability

Cisco Webex Network Recording Player for Windows and Cisco Webex Player for Windows contain multiple vulnerabilities due to insufficient validation of certain elements in Webex recordings stored in Advanced Recording Format (ARF) or Webex Recording Format (WRF). Specifically, the parsing of ARF files can trigger an out-of-bounds write past the end of an allocated buffer [1]. This issue can lead to arbitrary code execution. Affected software versions are those covered by Cisco's advisory [2].

Exploitation

An attacker can exploit these vulnerabilities by sending a malicious ARF or WRF file to a user via a link or email attachment, and persuading the user to open the file with the affected player software on their local system. No special authentication or network position is required; only user interaction is needed. The attacker can be remote and does not need any prior access to the target system [1].

Impact

Successful exploitation allows the attacker to execute arbitrary code on the affected system with the privileges of the targeted user. This could lead to full compromise of the user's system, including data theft, installation of malware, or further attacks [1][2].

Mitigation

Cisco has released free software updates that address these vulnerabilities [2]. Customers with valid licenses can obtain updates from Cisco. Those without service contracts should contact Cisco TAC for assistance. All users are advised to upgrade to the fixed software versions to prevent exploitation.