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 the Cisco Webex Network Recording Player for Microsoft Windows and the 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 via a link or an email attachment and persuading the user to open the file by using the affected software. A successful exploit could allow the attacker to execute arbitrary code on the affected system.
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-20181003-webex-rce
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Vulnerable Products
These vulnerabilities affect the following versions of the Cisco Webex Network Recording Player for Microsoft Windows and the 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 WBS31 sites – All Webex Network Recording Player and Webex Player versions prior to Version WBS31.23
- Cisco Webex Business Suite WBS32 sites – All Webex Network Recording Player and Webex Player versions prior to Version WBS32.15.30
- Cisco Webex Business Suite WBS33 sites – All Webex Network Recording Player and Webex Player versions prior to Version WBS33.5
- Cisco Webex Meetings Online – All Webex Network Recording Player and Webex Player versions prior to Version 1.3.39
- Cisco Webex Meetings Server – All Webex Network Recording Player versions prior to Version 3.0MR2 Patch 1
To determine which version of the Cisco Webex Network Recording Player or the Cisco Webex Player is installed on a system, users can open the player and choose Help > About.
Note: Customers should contact Cisco Webex Customer Support if they do not receive automatic software updates and are running a vulnerable software version that has reached the end-of-software-maintenance milestone.
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 the Apple Mac OS X or Linux versions of the Cisco Webex Network Recording Player or the Cisco Webex Player.
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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.
The 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 (WBS31, WBS32, and WBS33), Cisco Webex Meetings Online, and Cisco Webex Meetings Server. The player can be installed manually from the Cisco Webex website or automatically when a user accesses an ARF file for streaming playback from a Cisco Webex Business Suite site.
The Cisco Webex Player is the application that is used to play back WRF files. It is available from Cisco Webex Business Suite sites (WBS31, WBS32, and WBS33) 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.
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There are no workarounds that address these vulnerabilities. However, customers may remove the Cisco Webex Network Recording Player and the Cisco Webex Player from a system by using the software-removal procedure for the operating system. For example, to remove a player from a Microsoft Windows 10 system, customers can use the Apps & Features app in the Windows Settings app.
To remove all Cisco Webex software from a Microsoft Windows system, customers can use the Meeting Services Removal Tool, which is available for download from the Cisco Collaboration Help article, Cisco Webex and 3rd Party Support Utilities.
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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 Versions
Cisco fixed these vulnerabilities in the following versions of the Cisco Webex Network Recording Player and the Cisco Webex Player:
- Cisco Webex Business Suite WBS32 sites – Webex Network Recording Player and Webex Player Versions WBS32.15.30 and later
- Cisco Webex Business Suite WBS33 sites – Webex Network Recording Player and Webex Player Versions WBS33.5 and later
- Cisco Webex Meetings Online – Webex Network Recording Player and Webex Player Versions 1.3.39 and later
- Cisco Webex Meetings Server – Webex Network Recording Player Versions 3.0MR2 Patch 1 and later
Cisco has not and will not fix all these vulnerabilities in Cisco Webex Business Suite WBS31 sites because those sites have reached the end-of-version-support milestone. For information about this milestone and the upgrade plans for WBS31 sites, see Cisco Webex Meetings Suite End-of-Version Support Policy.
Customers can upgrade to a fixed version of the Cisco Webex Network Recording Player in either of two ways:
- Automatically: The player will be automatically upgraded to the latest version of the software when a user accesses an ARF file that is hosted on a Cisco Webex Business Suite site (WBS32 or WBS33), Cisco Webex Meetings Online site, or Cisco Webex Meetings Server.
- Manually: The player can be downloaded and installed from https://www.webex.com/play-webex-recording.html.
Note: Customers who use locked-down Cisco Webex sites will not receive updated versions of the Cisco Webex Network Recording Player automatically. These customers should contact Cisco Webex Customer Support to obtain updates or obtain the latest version of the player from https://www.webex.com/play-webex-recording.html.
Customers can upgrade to a fixed version of the Cisco Webex Player by uninstalling their current version of the player and then downloading and installing the latest version of the player from https://www.webex.com/play-webex-recording.html.
The following table lists the Cisco bug IDs and fixed versions of the software for each vulnerability that is described in this advisory. Customers are advised to upgrade to an appropriate version as indicated in the table.
Cisco Bug ID Fixed Versions Webex Meetings Suite WBS31 Sites Webex Meetings Suite WBS32 Sites Webex Meetings Suite WBS33 Sites Webex Meetings Server Webex Meetings Online CVE-2018-15408 CSCvj87934 32.15.30 or later 33.3 or later CSCvm51315 3.0MR2 Patch 1 CSCvm51318 1.3.37 CVE-2018-15409 CSCvj83752 31.23.4 or later 32.15.10 or later 33.3 or later CSCvj83767 3.0MR2 CSCvj83771 1.3.37 CVE-2018-15410 CSCvj83793 31.23.0 or later 32.15.10 or later 33.5 or later CSCvj83797 3.0MR2 CSCvj83803 1.3.37 CVE-2018-15411 CSCvk60158 32.15.30 or later 33.4 or later CSCvm51361 3.0MR2 Patch 1 CSCvm51371 1.3.37 CVE-2018-15412 CSCvj93877 32.15.30 or later 33.3 or later CSCvm51373 3.0MR2 Patch 1 CSCvm51374 1.3.37 CVE-2018-15413 CSCvk52518 32.15.20 or later 33.4 or later CSCvk52510 3.0MR2 CSCvk52521 1.3.39 CVE-2018-15415 CSCvk59945 32.15.10 or later 33.4 or later CSCvk59949 3.0MR2 CSCvk59950 1.3.37 CVE-2018-15416 CSCvj87929 32.15.10 or later 33.3 or later CSCvm51382 3.0MR2 CSCvm51386 1.3.37 CVE-2018-15417 CSCvk60163 32.15.30 or later 33.4 or later CSCvm51391 3.0MR2 Patch 1 CSCvm51393 1.3.37 CVE-2018-15418 CSCvj83818 31.23.0 or later 32.15.10 or later 33.5 or later CSCvj83824 3.0MR2 CSCvj83831 1.3.37 CVE-2018-15419 CSCvk31089 32.15.30 or later 33.3 or later CSCvm54531 3.0MR2 Patch 1 CSCvm54538 1.3.38 CVE-2018-15420 CSCvj93870 32.15.30 or later 33.3 or later CSCvm51396 3.0MR2 Patch 1 CSCvm51398 1.3.37 CVE-2018-15431 CSCvk33049 32.15.30 or later CSCvm51413 3.0MR2 Patch 1 CSCvm51412 1.3.38
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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 Trend Micro's Zero Day Initiative for reporting the following vulnerabilities: CVE-2018-15408, CVE-2018-15409, CVE-2018-15411, CVE-2018-15412, CVE-2018-15413, CVE-2018-15415, CVE-2018-15416, CVE-2018-15417, and CVE-2018-15420
Cisco would like to thank Steven Seeley (mr_me) of Source Incite, working with Trend Micro's Zero Day Initiative, for reporting the following vulnerabilities: CVE-2018-15410 and CVE-2018-15418
Cisco would like to thank Michael Flanders, working with Trend Micro's Zero Day Initiative, for reporting the following vulnerability: CVE-2018-15416
Cisco would like to thank Yonghui Han of Fortinet FortiGuard Labs for reporting the following vulnerability: CVE-2018-15419
Cisco would like to thank Fortinet FortiGuard Labs for reporting the following vulnerability: CVE-2018-15431
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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 1.1 Corrected the Vulnerable Products section to better highlight affected versions corresponding to the Fixed Software section. This is an informational change; no additional products or versions are affected. Affected Products Final 2018-October-10 1.0 Initial public release. — Final 2018-October-03
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