Summary

• A vulnerability in Cisco Webex Network Recording Player for Windows and MacOS and Cisco Webex Player for Windows and MacOS could allow an attacker to execute arbitrary code on an affected system.

  The vulnerability is due to insufficient validation of values within Webex recording files formatted as either Advanced Recording Format (ARF) or Webex Recording Format (WRF). An attacker could exploit the vulnerability by sending a user a malicious ARF or WRF file through a link or email attachment and persuading the user to open the file. A successful exploit could allow the attacker to execute arbitrary code on the affected system with the privileges of the targeted user.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  This advisory is available at the following link:
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-player-dOJ2jOJ

Affected Products

• Vulnerable Products

  This vulnerability affects Cisco Webex Network Recording Player for Windows and MacOS and Cisco Webex Player for Windows and MacOS releases earlier than Release 41.4. The players are available from Cisco Webex Meetings sites.

  
  

  To determine which release of Cisco Webex Network Recording Player or Cisco Webex Player is installed on a system, open the player and choose Help > About.

  Products Confirmed Not Vulnerable

  Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability.

Details

• Cisco Webex Meetings is a hosted, multimedia conferencing solution that is managed and maintained by Cisco Webex. Cisco Webex Meetings Server is a multimedia conferencing solution that customers host, manage, and maintain in their private clouds.

  
  

  Cisco Webex Meetings services can be configured to allow users to store meeting recordings online and download those recordings as ARF files. These services can also be configured to allow users to record meetings directly on their local computers as WRF files.

  
  

  Cisco Webex Network Recording Player is the application that is used to play back ARF files. It is available from Cisco Webex Meetings sites and Cisco Webex Meetings Server. The player can be installed manually from a user’s Cisco Webex website download page in Classic view, or from the Cisco Webex Video Recording page.

  
  

  Cisco Webex Player is the application that is used to play back WRF files. It is available from Cisco Webex Meetings sites. It is not available from Cisco Webex Meetings Server. The player can be installed manually from a user’s Cisco Webex website download page in Classic view, or from the Cisco Webex Video Recording page.

Workarounds

• There are no workarounds that address this vulnerability.

Fixed Software

• Cisco has released free software updates that address the vulnerabilities described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:
  https://www.cisco.com/c/en/us/products/end-user-license-agreement.html

  Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.

  When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page, to determine exposure and a complete upgrade solution.

  In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.

  Customers Without Service Contracts

  Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html

  Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.

  Fixed Releases

  Cisco fixed this vulnerability in Cisco Webex Network Recording Player and Cisco Webex Player releases 41.4 and later. Releases are available from the Cisco Webex Video Recording page or from corresponding Cisco Webex Meetings sites.

Exploitation and Public Announcements

• The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

Source

• Cisco would like to thank Kushal Arvind Shah of Fortinet for reporting this vulnerability.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-player-dOJ2jOJ

Revision History

• Version	Description	Section	Status	Date
  1.0	Initial public release.	-	Final	2021-JUN-02

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