==================================================================== CERT-Renater Note d'Information No. 2020/VULN108 _____________________________________________________________________ DATE : 05/03/2020 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Windows running Cisco Webex Meetings versions prior to 39.5.17, 39.11.0, Webex Meetings Latest Sites versions prior to 40.0, Webex Meetings Online versions prior to 1.3.49, Webex Meetings Server versions prior to 3.0MR3SecurityPatch1, 4.0MR2SecurityPatch2. ===================================================================== https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200304-webex-player _____________________________________________________________________ Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulnerabilities High Advisory ID: cisco-sa-20200304-webex-player First Published: 2020 March 4 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvr82763 CSCvr84091 CSCvr84096 CSCvr89202 CSCvr89467 CSCvr89471 CVSS Score: Base 7.8 CVE-2020-3127 CVE-2020-3128 CWE-20 Summary Multiple vulnerabilities in Cisco Webex Network Recording Player for Microsoft Windows and Cisco Webex Player for Microsoft Windows could allow an attacker to execute arbitrary code on an affected system. The vulnerabilities are due to insufficient validation of certain elements within a Webex recording that is stored in either the Advanced Recording Format (ARF) or the Webex Recording Format (WRF). An attacker could 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. 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 these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200304-webex-player Affected Products Vulnerable Products These vulnerabilities affect the following releases of Cisco Webex Network Recording Player for Microsoft Windows and Cisco Webex Player for Microsoft Windows, which are available from Cisco Webex Meetings sites, Cisco Webex Meetings Online sites, and Cisco Webex Meetings Server: Cisco Webex Meetings — All Webex Network Recording Player and Webex Player releases earlier than Release WBS 39.5.17 or WBS 39.11.0 Cisco Webex Meetings Online — All Webex Network Recording Player and Webex Player releases earlier than Release 1.3.49 Cisco Webex Meetings Server — All Webex Network Recording Player releases earlier than Release 3.0MR3SecurityPatch1 and 4.0MR2SecurityPatch2 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 these vulnerabilities. Details Cisco Webex Meetings services and Cisco Webex Meetings Online are hosted, multimedia conferencing solutions that are 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 used to play back ARF files. It is available from Cisco Webex Meetings sites, Cisco Webex Meetings Online, and Cisco Webex Meetings Server. It can be installed manually from the Cisco Webex website, from a user’s Webex site, or automatically when a user accesses an ARF file for streaming playback from a Cisco Webex Meetings site. Cisco Webex Player is used to play back WRF files. It is available from Cisco Webex Meetings sites and Cisco Webex Meetings Online. It is not available from Cisco Webex Meetings Server. It can also be installed manually from the Cisco Webex website or from a user’s Webex site. Workarounds There are no workarounds that address these vulnerabilities. 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 and Alerts 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 Customers are advised to upgrade to an appropriate fixed software release as indicated in the following table: Cisco Webex Platform First Fixed Release Webex Meetings 39.5.x Sites 39.5.17 Webex Meetings Latest Sites 40.0 Webex Meetings Online1 1.3.43 (CVE-2020-3127) 1.3.49 (CVE-2020-3128) Webex Meetings Server 3.0MR3SecurityPatch1 Webex Meetings Server 4.0MR2SecurityPatch2 1. Although the vulnerability identified as CVE-2020-3127 is addressed in Cisco Webex Meetings Online Release 1.3.43, this release is still affected by the vulnerability identified as CVE-2020-3128. Customers who are using Cisco Webex Meetings Online are advised to upgrade to Release 1.3.49 or later to address all vulnerabilities described in this advisory. Note: Cisco Webex Meetings 33.6.x releases reached end of life on Feb. 28, 2020. Customers are advised to upgrade to a fixed and supported release. Exploitation and Public Announcements The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory. Source Cisco would like to thank Francis Provencher (PRL) working with Trend Micro Zero Day Initiative for reporting the vulnerability identified as CVE-2020-3127. Cisco would also like to thank Kexu Wang of Fortinet’s FortiGuard Labs for independently reporting this vulnerability as well as the vulnerability identified as CVE-2020-3128. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200304-webex-player Revision History Version Description Section Status Date 1.0 Initial public release. — Final 2020-MAR-04 Legal Disclaimer THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================