Cisco Security Advisory
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CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
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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 exist because the affected software improperly validates Advanced Recording Format (ARF) and Webex Recording Format (WRF) files. An attacker could exploit these vulnerabilities by sending a user a malicious ARF or WRF file through a link or email attachment and persuading the user to open the file with the affected software 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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-webex-player
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Vulnerable Products
These vulnerabilities affect the following versions of Cisco Webex Network Recording Player for Microsoft Windows and Cisco Webex Player for Microsoft Windows, which are available from Cisco Webex Business Suite sites, Cisco Webex Meetings Online sites, and Cisco Webex Meetings Server:
- Cisco Webex Business Suite sites — all Webex Network Recording Player and Webex Player releases earlier than Release WBS 39.5.5
- Cisco Webex Meetings Online — all Webex Network Recording Player and Webex Player releases earlier than Release 1.3.43
- Cisco Webex Meetings Server — all Webex Network Recording Player releases earlier than Release 2.8MR3Patch3, 3.0MR2Patch4, 4.0, or 4.0MR1
To determine which release of Cisco Webex Network Recording Player or Cisco Webex Player is installed on a system, users can 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.
Cisco has confirmed that these vulnerabilities do not affect Cisco Webex Player for macOS.
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Cisco Webex Business Suite 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 Business Suite 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 Business Suite sites, Cisco Webex Meetings Online, and Cisco Webex Meetings Server. The player 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 Business Suite site.
Cisco Webex Player is the application that is used to play back WRF files. It is available from Cisco Webex Business Suite sites and Cisco Webex Meetings Online. It is not available from Cisco Webex Meetings Server. The player can also be installed manually from the Cisco Webex website or from a user’s Webex site.
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There are no workarounds that address these vulnerabilities.
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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.htmlAdditionally, 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.htmlCustomers 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:
CVE ID First Fixed Release for These Vulnerabilities Webex Business Suite WBS Latest Sites Webex Business Suite WBS 39.5.x Sites Webex Meetings Online Webex Meetings Server CVE-2019-1924 39.6.0 39.5.0.632 1.3.43 2.8MR3Patch3, 3.0MR2Patch4
CVE-2019-1925
39.6.0 39.5.0.581 1.3.43 2.8MR3Patch3, 3.0MR2Patch4
CVE-2019-1926 39.6.0 39.3.0.499 1.3.43 2.8MR3Patch3, 3.0MR2Patch4, 4.0
CVE-2019-1927 39.6.0 39.5.0.581 1.3.43 2.8MR3Patch3, 3.0MR2Patch4
CVE-2019-1928 39.6.0
39.5.5 1.3.43 2.8MR3Patch3, 3.0MR2Patch4
CVE-2019-1929 39.6.0
39.5.5 1.3.43 4.0MR1
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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.
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Cisco would like to thank Yici Wang and Kushal Arvind Shah of Fortinet’s FortiGuard Labs for reporting these vulnerabilities.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.0 Initial public release. — Final 2019-August-07
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