Cisco Security AdvisoryCritical
Advisory ID:
cisco-sa-20130904-webex
First Published:
2013 September 4 16:00 GMT
Version 1.0:
Workarounds:
Cisco Bug IDs:
CVSS Score:
Base 9.3,
Temporal 7.3
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AV:N/AC:M/Au:N/C:C/I:C/A:C/E:POC/RL:OF/RC:C
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AV:N/AC:M/Au:N/C:C/I:C/A:C/E:POC/RL:OF/RC:C
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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 crash an affected player, 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 on-line 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.
Cisco has released software updates that address these vulnerabilities. This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130904-webex
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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 and WBS28), 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 (WBS28) client builds prior to T28.8 (28.8)
- Cisco WebEx Business Suite (WBS27) client builds prior to T27LDSP32EP16 (27.32.16)
- Cisco WebEx 11 versions prior to 1.2 SP6 (1.2.6.0) with client builds prior to T28.8 (28.8)
- Cisco WebEx Meetings Server client builds prior to T27L10NSP32_ORION111
Alternatively, version information of the Cisco WebEx Meeting client can be accessed from within the Cisco WebEx Meeting client. To determine version information of the Cisco WebEx meeting client on Windows and Linux platforms, it can be viewed by choosing Help > About Cisco WebEx Meeting Center to determine version information of the Cisco WebEx meeting client on Mac platforms, it 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.
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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 ARF Player Memory Corruption Vulnerability
CVE-2013-1115 CSCue74118, CSCub28371, CSCud23401 and CSCud31109
Cisco WebEx ARF Player Heap Corruption Vulnerability
CVE-2013-1116
CSCue74147 and CSCub28383
Cisco WebEx WRF Player Exception Handler Corruption Vulnerability CVE-2013-1117 CSCuc27639
Cisco WebEx WRF Player Stack Buffer Overflow Vulnerability
CVE-2013-1118
CSCuc27645
Cisco WebEx WRF Player JPEG DHT Index Memory Corruption Vulnerability CVE-2013-1119 CSCuc24503
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.
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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#.
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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 and WBS28) and Cisco WebEx 11 correct the vulnerabilities described in this advisory:- Cisco WebEx Business Suite (WBS28) client builds T28.8 (28.8) or later
- Cisco WebEx Business Suite (WBS27) client builds 27.32.16 (T27LDSP32EP16) or later
- Cisco WebEx 11 1.2.6.0 (1.2 SP6) builds T28.8 (28.8) or later
The following client builds of Cisco WebEx Meetings Server correct the vulnerabilities described in this advisory:- Cisco WebEx Meetings Server client builds T27L10NSP32_ORION111 or later
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
Five 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 on 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.
Product Client Build Cisco DLL Filename DLL File Versions WBS27 27.32.16 Atas32_Lite.dll
1027,1232,1016,2201
WBS27 27.32.16 atpdmod.dll
2029.1232.1116.2300
WBS27 27.32.16 atas32.dll 1027,1232,1016,2200
WBS27 27.32.16 atjpg60.dll
1027,1232,1016,2200
WBS27 27.32.16 atdl2006.dll 1027,1232,1016,2200 WBS27 27.32.16 atprtsc.dll
2029.1232.1116.2300
WBS27 27.32.16 atprtses.dll
2029.1232.1116.2300
WBS27 27.32.16 nbrpd.dll 2029.1232.1116.2300 WBS28 28.8 atas32_lite.dll 28,0800,0112,1105 WBS28 28.8 atas32.dll 28,0800,0012,1105 WBS28 28.8 atdl2006.dll 1028,1208,1100,0500 WBS28 28.8 atjpg60.dll 2028,1208,1100,500 WBS28 28.8 atpdmod.dll 2028.1208.1100.2300 WBS28 28.8 atprtsc.dll 2028.1208.1100.2300 WBS28 28.8 atprtses.dll 2028.1208.1100.2300
WBS28 28.8 nbrpd.dll 2028.1208.1100.2300 Cisco WebEx 11 28.8 atas32_lite.dll 28,0800,0012,1105
Cisco WebEx 11 28.8 atas32.dll 28,0800,0012,1105 Cisco WebEx 11 28.8 atdl2006.dll 1028,1208,1100,0500 Cisco WebEx 11 28.8 atjpg60.dll 2028,1208,1100,500 Cisco WebEx 11 28.8 atpdmod.dll 2028.1208.1100.2300 Cisco WebEx 11 28.8 atprtsc.dll 2028.1208.1100.2300 Cisco WebEx 11 28.8 atprtses.dll 2028.1208.1100.2300 Cisco WebEx 11 28.8 nbrpd.dll 2028.1208.1100.2300 Cisco WebEx Meetings Server T27L10NSP32_ORION111 atpdmod.dll 2029.1332.400.1703 Cisco WebEx Meetings Server T27L10NSP32_ORION111 nbrpd.dll 2029.1332.400.1703 Cisco WebEx Meetings Server T27L10NSP32_ORION111 pdcvt.dll 2029.1332.400.1703 Cisco WebEx Meetings Server T27L10NSP32_ORION111 atprtses.dll 2029.1332.400.1703 Cisco WebEx Meetings Server T27L10NSP32_ORION111 atprtsc.dll 2029.1332.400.1703
Apple Mac OS X
Four 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 shown 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.
Product Client Build Cisco DLL Filename DLL File Version WBS27 27.32.16 as.bundle 1210.24.2732.16 WBS27 27.32.16 asplayback.bundle 1210.24.2732.16 WBS27 27.32.16 atas.bundle 1210.24.2732.16 WBS27 27.32.16 nbrpd.bundle 1211.15.2732.16 WBS27 27.32.16 pd.bundle 1211.15.2732.16 WBS28 28.8 as.bundle 1211.5.2808.0 WBS28 28.8 asplayback.bundle 1211.5.2808.0 WBS28 28.8 atas.bundle 1211.5.2808.0 WBS28 28.8 nbrpd.bundle 1211.20.2808.0 WBS28 28.8 pd.bundle 1211.20.2808.0 Cisco WebEx 11 28.8< as.bundle 1211.5.2808.0 Cisco WebEx 11 28.8 asplayback.bundle 1211.5.2808.0 Cisco WebEx 11 28.8 atas.bundle 1211.5.2808.0 Cisco WebEx 11 28.8 nbrpd.bundle 1211.5.2808.0 Cisco WebEx 11 28.8 pd.bundle 1211.5.2808.0 Cisco WebEx Meetings Server T27L10NSP32_ORION111 nbrpd.bundle 1308.01.2732.202
Linux
Three 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.
Product Client Build Cisco DLL File Name DLL File Version WBS27 27.32.16 libatdv.so 922700067 WBS27 27.32.16 libnbrdv.so 1.0.27.23 WBS27 27.32.16 NBR Player AS 1.29.27.23 WBS27 27.32.16 WRF player AS 1.29.27.28 WBS28 28.8 libatdv.so 922800010 WBS28 28.8 libnbrdv.so 1.0.28.19 WBS28 28.8 NBR Player AS 1.0.28.18 WBS28 28.8 WRF player AS 1.0.28.19 Cisco WebEx 11 28.8 libatdv.so 922800010 Cisco WebEx 11 28.8 libnbrdv.so 1.0.28.19 Cisco WebEx 11 28.8 NBR Player AS 1.0.28.19 Cisco WebEx 11 28.8 WRF player AS 1.0.28.19
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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 described in this advisory.
These vulnerabilities were reported to Cisco by iDefense and Microsoft Vulnerability Research (MSVR) as follows:
Vulnerability
Reporter
Cisco WebEx ARF Player Memory Corruption Vulnerability
MSVR Cisco WebEx ARF Player Heap Corruption Vulnerability
MSVR
Cisco WebEx WRF Player Exception Handler Corruption Vulnerability
MSVR
Cisco WebEx WRF Player Stack Buffer Overflow Vulnerability
MSVR
Cisco WebEx WRF Player JPEG DHT Index Memory Corruption Vulnerability iDefense
Cisco would like to thank these researchers for reporting these vulnerabilities to us, and for working with us towards coordinated disclosure of the 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 LessRevision 1.0 2013-September-04 Initial public release.
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