Multiple Vulnerabilities in the Cisco WebEx Recording Format and Advanced Recording Format Players

Summary

• Multiple buffer overflow vulnerabilities exist in the Cisco WebEx Recording Format (WRF) and Advanced Recording Format (ARF) Players. Exploitation of these vulnerabilities could allow a remote attacker to cause an affected player to crash and, in some cases, could allow a remote attacker to execute arbitrary code on the system of a targeted user.
  
  The Cisco WebEx Players are applications that are used to play back WebEx meeting recordings that have been recorded on the computer of an online meeting attendee. The players can be automatically installed when the user accesses a recording file that is hosted on a WebEx server.
  
  Cisco has updated affected versions of the Cisco WebEx Business Suite meeting sites, Cisco WebEx 11 meeting sites, Cisco WebEx Meetings Server, and Cisco WebEx WRF and ARF Players to address these vulnerabilities. This advisory is available at the following link:
  http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140507-webex

Affected Products

• Vulnerable Products

  The vulnerabilities disclosed in this advisory affect the Cisco WebEx WRF Player and the Cisco WebEx ARF Player. The following client builds of Cisco WebEx Business Suite (WBS27, WBS28 and WBS29), Cisco WebEx 11, and Cisco WebEx Meetings Server are affected by at least one of the vulnerabilities described in this advisory:
  

  • Cisco WebEx Business Suite (WBS29) client builds prior to T29.2
  • Cisco WebEx Business Suite (WBS28) client builds prior to T28.12
  • Cisco WebEx Business Suite (WBS27) client builds prior to T27LDSP32EP16 (27.32.16)
  • Cisco WebEx 11 versions prior to 1.2.10 with client builds prior to T28.12
  • Cisco WebEx Meetings Server client builds prior to 2.0.0.1677

  
  To determine whether a Cisco WebEx meeting site is running an affected version of the WebEx client build, users can log in to their Cisco WebEx meeting site and go to the Support > Downloads section. The version of the WebEx client build will be displayed on the right side of the page under "About Support Center." See "Software Versions and Fixes" for details.
  
  Alternatively, version information of the Cisco WebEx Meeting client can be accessed from within the Cisco WebEx Meeting client. Version information for the Cisco WebEx meeting client on Windows and Linux platforms can be viewed by choosing Help > About Cisco WebEx Meeting Center. Version information for the Cisco WebEx meeting client on Mac platforms can be viewed by choosing Meeting Center > About Cisco WebEx Meeting Center.
  
  The Cisco WebEx software updates are cumulative in client builds. For example, if client build 27.32.16 is fixed, build 27.32.17 will contain updated software; Cisco WebEx site administrators have access to secondary version nomenclature, for example, T27 SP32 EP16. The example shows the server is running client build 27.32.16.
  
  Note: Customers who do not receive automatic software updates may be running versions of Cisco WebEx that have reached end of software maintenance and should contact customer support.

  Products Confirmed Not Vulnerable

  No other Cisco products are currently known to be affected by these vulnerabilities.

Details

• The Cisco WebEx Business Suite (WBS) meeting services and Cisco WebEx 11 are hosted multimedia conferencing solutions that are managed and maintained by Cisco WebEx. The Cisco WebEx Meetings Server is a multimedia conferencing solution that customers can host in their private clouds.
  
  The ARF and WRF file formats are used to store WebEx meeting recordings that have been recorded on a WebEx meeting site, or on the computer of an online meeting attendee.
  
  The Cisco WebEx ARF Player and the Cisco WebEx WRF Player are applications that are used to play back and edit WebEx ARF and WRF recording files (files with .arf and .wrf extensions).
  
  The Cisco WebEx WRF Player and Cisco WebEx ARF Player can be automatically installed when the user accesses a recording file that is hosted on a WebEx meeting site (for stream playback mode). The Cisco WebEx ARF Player and the Cisco WebEx WRF Player can also be manually installed after downloading the application from http://www.webex.com/play-webex-recording.html to play back recording files for offline playback.
  
  The Cisco WebEx ARF Player is available for all Cisco WebEx meeting site clients (WBS27, WBS28 and WebEx11) and for Cisco WebEx Meetings Server clients. The Cisco WebEx WRF Player is only available for Cisco WebEx WBS 27 and WBS28 meeting site clients and is not available for the Cisco WebEx 11 or Cisco WebEx Meetings Server clients.
  
  The following table provides the Cisco bug IDs and Common Vulnerabilities and Exposures (CVE) identifiers that have been assigned for the vulnerabilities in this advisory:
  
  

  Title	CVE ID	Cisco Bug IDs
  Cisco WebEx WRF and ARF Player Out of Bound Memory Read Vulnerability	CVE-2014-2132	CSCuh52768
  Cisco WebEx ARF Player LZW Decompress Memory Corruption Vulnerability	CVE-2014-2133	CSCuj87565
  Cisco WebEx Player WRF File Audio Channel Parsing Heap Overflow Vulnerability	CVE-2014-2134	CSCuc39458
  Cisco WebEx ARF Players Memory Corruption Vulnerability	CVE-2014-2135	CSCul87216, CSCuj07603
  Cisco WebEx ARF Players Memory Corruption Vulnerability	CVE-2014-2136	CSCui72223, CSCul01163, CSCul01166

  
  
  Exploitation of these vulnerabilities may cause player applications to crash or, in some cases, remote code execution could occur.
  
  To exploit one of these vulnerabilities, the player applications would need to open a malicious ARF or WRF file. An attacker may be able to accomplish this exploit by providing the malicious recording file directly to users (for example, by using email), or by directing a user to a malicious web page. The vulnerabilities cannot be triggered by users who are attending a WebEx meeting.
  
  

Workarounds

• While there are no workarounds for the vulnerabilities detailed in this advisory, it is possible to remove all WebEx software completely from a system using the Meeting Services Removal Tool (for Microsoft Windows users) or Mac Cisco-WebEx Uninstaller (for Apple Mac OS X users) available at http://support.webex.com/support/downloads.html.
  
  Removal of WebEx software from a Linux or UNIX-based system can be accomplished by following the steps in the WebEx knowledge base help article at the following link: https://support.webex.com/MyAccountWeb/knowledgeBase.do?root=Tools&parent=Knowledge&articleId=WBX28548&txtSearchQuery=uninstall%20linux#.
  

  
  

Fixed Software

• When considering software upgrades, customers are advised to consult the Cisco Security Advisories, Responses, and Notices archive at http://www.cisco.com/go/psirt and review subsequent advisories 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.
  
  The following client builds of Cisco WebEx Business Suite (WBS27, WBS28, WBS29) and Cisco WebEx 11 correct the vulnerabilities described in this advisory:
  

  • Cisco WebEx Business Suite (WBS29) client builds T29.2 or later
  • Cisco WebEx Business Suite (WBS28) client builds T28.12 or later
  • Cisco WebEx Business Suite (WBS27) client builds T27TLSP32EP16 (27.32.16) or later
  • Cisco WebEx 11 version 1.2.10 with client builds T28.12 or later
  • Cisco WebEx Meetings Server client builds 2.0.0.1677 or later

  Client builds of the Cisco WebEx Business Suite prior to T27 SP32 have reached end of support; to obtain fixed software please upgrade to the latest version.
  
  The following client builds of Cisco WebEx Meetings Server correct the vulnerabilities described in this advisory:
  

  • Cisco WebEx Meetings Server client builds Orion 2.0 or later

  To determine whether a Cisco WebEx meeting site is running an affected version of the WebEx client build, users can log in to their Cisco WebEx meeting site and go to the Support > Downloads section. The version of the WebEx client build will be displayed on the right side of the page under "About Support Center." See "Software Versions and Fixes" for details. The Cisco WebEx software updates are cumulative in client builds. For example, if client build 27.32.16 is fixed, build 27.32.17 will contain updated software.
  
  The vulnerabilities disclosed in this advisory affect the Cisco WebEx WRF and ARF Players. The Microsoft Windows, Apple Mac OS X, and Linux versions of the players are all affected by at least one vulnerability described in this advisory. If the Cisco WebEx ARF Player or the Cisco WebEx WRF Player was automatically installed, it will be automatically upgraded to the latest, nonvulnerable version when users access a recording file that is hosted on a WebEx meeting site. If the Cisco WebEx ARF Player or the Cisco WebEx WRF Player was manually installed, users will need to manually install a new version of the player after downloading the latest version from http://www.webex.com/play-webex-recording.html.
  
  Users can manually verify the installed version of the Cisco WebEx ARF Player or the Cisco WebEx WRF Player to determine whether they are affected by these vulnerabilities. To do so, an administrator must examine the version numbers of the installed files and determine whether the version of the file contains the fixed code. Detailed instructions on how to verify the version numbers are provided in the following sections.
  
  Microsoft Windows
  

  
  

  Ten dynamic link libraries (DLLs) were updated on the Microsoft Windows platform to address the vulnerabilities that are described in this advisory. These files are in the C:\Program Files\WebEx\Record Playback folder or the C:\Program Files (x86)\Webex\Record Player folder. The version number of a DLL can be obtained by browsing the Record Playback directory in Windows Explorer, right-clicking the filename, and choosing Properties. The Version or Details tab of the Properties page provides details about the library version. The following table provides the first fixed version for each DLL. If the installed versions are equal to or greater than the versions provided in the table, the system is not vulnerable.
  
  

  Client Build	Cisco DLL Filename	DLL File Versions
  T28	atas32.dll	28, 0800, 0012, 1105
  T28	Atjpeg60.dll	2028,1208,1100,500
  T28	atas32_lite.dll	28, 0800, 0112, 1105
  T28	atdl2006.dll	1028, 1208, 1100, 0500
  T28	atpdmod.dll	2028.1208.1100.2300
  T28	nbrpd.dll	2028.1208.1100.2300
  T28	atprtses.dll	2028.1208.1100.2300
  T28	atprtsc.dll	2028.1208.1100.2300
  T27LDSP32EP16	atjpg60.dll	1027,1232,1016,2200
  T27LDSP32EP16	atas32.dll	1027,1232,1016,2200
  T27LDSP32EP16	Atas32_Lite.dll	1027,1232,1016,2201
  T27LDSP32EP16	atdl2006.dll	1027,1232,1016,2300
  T27LDSP32EP16	atpdmod.dll	2029.1232.1116.2300
  T27LDSP32EP16	nbrpd.dll	2029.1232.1116.2300
  T27LDSP32EP16	atprtses.dll	2029.1232.1116.2300
  T27LDSP32EP16	atprtsc.dll	2029.1232.1116.2300
  T29L10N	nbrpse.dll	2029.1311.900.1100
  Orion2.0.0.FCS	nbrpse.dll	2029.1332.1200.600

  
  
  Apple Mac OS X
  
  Six package bundles were updated on the Apple Mac OS platform to address the vulnerabilities that are described in this advisory. This file is in each user's home directory and can be accessed from ~/ Library/Application Support/WebEx Folder/924. The version can be obtained by browsing to the appropriate folder in Finder and control-clicking the filename. When the menu is displayed, select show package contents and then double-click the Info.plist file. The version number is at the bottom of the displayed table. The following table provides the first fixed version for each package bundle. If the installed versions are equal to or greater than the versions provided in the table, the system is not vulnerable.
  
  

  Client Build	Cisco Bundle Filename	Bundle File Versions
  T28	as.bundle	1211.5.2808.0
  T28	atas.bundle	1211.5.2808.0
  T28	asplayback.bundle	1211.5.2808.0
  T28	pd.bundle	1211.20.2808.0
  T28	nbrpd.bundle	1211.20.2808.0
  T27LDSP32EP16	as.bundle	1210.24.2732.16
  T27LDSP32EP16	atas.bundle	1210.24.2732.16
  T27LDSP32EP16	asplayback.bundle	1210.24.2732.16
  T27LDSP32EP16	pd.bundle	1211.15.2732.16
  T27LDSP32EP16	nbrpd.bundle	1211.15.2732.16
  T29L10N	nbrpse.bundle	1309.11.2900.0
  Orion2.0.0.FCS	nbrpse.bundle	1312.06.2732.201

  
  Linux
  
  Eight shared objects were updated on the Linux platform to address the vulnerabilities that are described in this advisory. These files are in the ~/.webex directory. The version number of the shared objects can be obtained by performing a directory listing with the ls command. The version number is provided after the .so extension. The following table provides the first fixed version for each shared object. If the installed versions are equal to or greater than the versions provided in the table, the system is not vulnerable. There is no entry in the following table for the Cisco WebEx Meetings Server, as the product does not support Linux clients.
  
  

  Client Build	Cisco Shared Object Filename	Shared Object File Versions
  T28	WRF player AS	1.0.28.19
  T28	NBR Player AS	1.0.28.18
  T28	Meeting AS	922800026
  T28	libatdv.so	922800010
  T28	libnbrdv.so	1.0.28.19
  T27LDSP32EP16	WRF player AS	1.29.27.28
  T27LDSP32EP16	NBR Player AS	1.29.27.23
  T27LDSP32EP16	libatdv.so	922700067
  T27LDSP32EP16	libnbrdv.so	1.0.27.23
  T29L10N	nbrpse.so	1.0.29.3

  
  

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 described in this advisory.

  These vulnerabilities were reported to Cisco by Fortinet, iDefense, and Microsoft Vulnerability Research (MSVR) as follows:
  
  

  Cisco Bug IDs	Reporter
  CSCuh52768, CSCuj87565, CSCui72223, CSCul01163, CSCul01166	Fortinet
  CSCuc39458	iDefense
  CSCul87216, CSCuj07603	MSVR and Christopher Gabriel of Telos Corporation

  
  Cisco thanks these researchers for reporting these vulnerabilities to us, and for working with us toward coordinated disclosure of the vulnerabilities.

URL

• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140507-webex

Revision History

• Revision 1.0

  2014-May-07

  Initial public release.

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