ID

VAR-200912-0441

CVE

CVE-2009-2876

TITLE

Cisco WebEx WRF Player of atas32.dll Heap-based buffer overflow vulnerability

DESCRIPTION

Heap-based buffer overflow in atas32.dll in the Cisco WebEx WRF Player 26.x before 26.49.32 (aka T26SP49EP32) for Windows, 27.x before 27.10.x (aka T27SP10) for Windows, 26.x before 26.49.35 for Mac OS X and Linux, and 27.x before 27.11.8 for Mac OS X and Linux allows remote attackers to cause a denial of service (application crash) or execute arbitrary code via a crafted WebEx Recording Format (WRF) file, a different vulnerability than CVE-2009-2878 and CVE-2009-2879. Cisco WebEx WRF Player of atas32.dll Contains a heap-based buffer overflow vulnerability. This vulnerability CVE-2009-2878 and CVE-2009-2879 Is a different vulnerability.Skillfully crafted by a third party WebEx Recording Format (WRF) Service disruption via file (DoS) Could be put into a state or execute arbitrary code. Cisco WebEx is prone to multiple remote buffer-overflow vulnerabilities because the software fails to perform adequate boundary checks on user-supplied data. An attacker can exploit these issues to execute arbitrary code with administrative privileges. Successful exploits will completely compromise affected computers. Failed exploit attempts will result in a denial-of-service condition. This vulnerability is different from CVE-2009-2878 and CVE-2009-2879. ---------------------------------------------------------------------- Do you have VARM strategy implemented? (Vulnerability Assessment Remediation Management) If not, then implement it through the most reliable vulnerability intelligence source on the market. Implement it through Secunia. ORIGINAL ADVISORY: Cisco: http://www.cisco.com/warp/public/707/cisco-sa-20091216-webex.shtml ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/advisories/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/advisories/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Cisco Security Advisory: Multiple Cisco WebEx WRF Player Vulnerabilities Advisory ID: cisco-sa-20091216-webex http://www.cisco.com/warp/public/707/cisco-sa-20091216-webex.shtml Revision 1.0 For Public Release 2009 December 16 1600 UTC (GMT) Summary ======= Multiple buffer overflow vulnerabilities exist in the Cisco WebEx Recording Format (WRF) Player. The Cisco WebEx WRF Player is an application that is used to play back WebEx meeting recordings that have been recorded on the computer of an on-line meeting attendee. The WRF Player can be automatically installed when the user accesses a WRF file that is hosted on a WebEx server. The WRF Player can also be manually installed for offline playback after downloading the application from www.webex.com. If the WRF Player was automatically installed, the WebEx WRF Player will be automatically upgraded to the latest, non-vulnerable version when users access a WRF file hosted on a WebEx server. If the WebEx WRF Player was manually installed, users will need to manually install a new version of the player after downloading the latest version from www.webex.com. Cisco has released free software updates that address these vulnerabilities. This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20091216-webex.shtml. Affected Products ================= Vulnerable Products - ------------------- The vulnerabilities disclosed in this advisory affect the Cisco WebEx WRF Player. Microsoft Windows, Apple Mac OS X, and Linux versions of the player are affected. Affected versions of the WRF Player are those prior to the "first fixed" versions, which are shown in the section "Software Versions and Fixes" of this advisory. To check if a Cisco WebEx server is running an affected version of the WebEx client build, users can log in to their Cisco WebEx server and go to the Support -> Downloads section. The version of the WebEx client build will be displayed on the right-hand side of the page under "About Support Center", for example "Client build: 27.11.0.3328". There is no way to check if a manually installed version of the WRF Player is affected by these vulnerabilities. Therefore, Cisco recommends that users upgrade to the most current version of the player that is available from http://www.webex.com/downloadplayer.html. Products Confirmed Not Vulnerable - --------------------------------- The Cisco WebEx Player for the WebEx Advanced Recording Format (ARF) file format is not affected by these vulnerabilities. No other Cisco products are currently known to be affected by these vulnerabilities. Details ======= The WebEx meeting service is a hosted multimedia conferencing solution that is managed by and maintained by Cisco WebEx. The WebEx Recording Format (WRF) is a file format that is used to store WebEx meeting recordings that have been recorded on the computer of an on-line meeting attendee. The WRF Player is an application that is used to play back and edit WRF files (files with .wrf extensions). The WRF Player can be automatically installed when the user accesses a WRF file that is hosted on a WebEx server (stream playback mode). The WRF Player can also be manually installed after downloading the application from www.webex.com to play back WRF files locally (offline playback mode). The vulnerabilities may lead to a crash of the WRF Player application, or in some cases, lead to remote code execution. To exploit a vulnerability, a malicious WRF file would need to be opened by the WRF Player application. An attacker may be able to accomplish this by providing the malicious WRF file directly to users (for example, via e-mail), or by convincing users to visit a malicious website. The vulnerability cannot be triggered by users attending a WebEx meeting. These vulnerabilities have been assigned the following Common Vulnerabilities and Exposures (CVE) identifiers: * CVE-2009-2875 * CVE-2009-2876 * CVE-2009-2877 * CVE-2009-2878 * CVE-2009-2879 * CVE-2009-2880 Vulnerability Scoring Details ============================= Cisco has provided scores for the vulnerabilities in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this Security Advisory is done in accordance with CVSS version 2.0. CVSS is a standards-based scoring method that conveys vulnerability severity and helps determine urgency and priority of response. Cisco has provided a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks. Cisco has provided an FAQ to answer additional questions regarding CVSS at: http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at: http://intellishield.cisco.com/security/alertmanager/cvss * Multiple Cisco WebEx Player Buffer Overflow Vulnerabilities (all vulnerabilities in this advisory) CVSS Base Score - 9.3 Access Vector - Network Access Complexity - Medium Authentication - None Confidentiality Impact - Complete Integrity Impact - Complete Availability Impact - Complete CVSS Temporal Score - 7.7 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed Impact ====== Successful exploitation of the vulnerabilities described in this document could result in a crash of the Cisco WebEx WRF Player application, and in some cases, allow a remote attacker to execute arbitrary code on the targeted system with the privileges of the user running the WRF Player application. Software Versions and Fixes =========================== The table below contains "First Fixed" information for the Cisco WebEx WRF Player that is automatically downloaded from a WebEx site when a WRF hosted on a WebEx site is accessed (stream playback mode). Fixes are cumulative within a major release so for example, if release 27.10.1 is fixed, then release 27.10.2 will have the fix too. +------------------------------------------------------------+ | Platform | Major Release 26.x | Major Release 27.x | |-----------+---------------------+--------------------------| | Microsoft | 26.49.32; available | 27.10.x; available now | | Windows | now except lockdown | for non-PSO and | | | sites | non-lockdown sites | |-----------+---------------------+--------------------------| | | 26.49.35; available | 27.11.8; available now | | Mac OS X | early February 2010 | for non-PSO and | | | | non-lockdown sites | |-----------+---------------------+--------------------------| | | 26.49.35; available | 27.11.8; available now | | Linux | early February 2010 | for non-PSO and | | | | non-lockdown sites | +------------------------------------------------------------+ PSO and lockdown sites running 27.x will receive the fixes for these vulnerabilities during the next emergency patching (EP) cycle. This advisory will be updated to indicate a specific timeline once one is available. If the WRF Player was automatically installed, the WebEx WRF Player will be automatically upgraded to the latest, non-vulnerable version when users access a WRF file hosted on a WebEx server. If the WebEx WRF Player was manually installed, users will need to manually install a new version of the player after downloading the latest version from www.webex.com. Workarounds =========== There are no workarounds for the vulnerabilities disclosed in this advisory. Obtaining Fixed Software ======================== Cisco has released free software updates that address these vulnerabilities. Prior to deploying software, customers should consult their maintenance provider or check the software for feature set compatibility and known issues specific to their environment. Customers may only install and expect support for the feature sets they have purchased. By installing, downloading, accessing or otherwise using such software upgrades, customers agree to be bound by the terms of Cisco's software license terms found at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html, or as otherwise set forth at Cisco.com Downloads at http://www.cisco.com/public/sw-center/sw-usingswc.shtml. Do not contact psirt@cisco.com or security-alert@cisco.com for software upgrades. Customers that need additional information can contact WebEx Global Support Services and Technical Support. WebEx Global Support Services and Technical Support can be reached through the WebEx support site at http://support.webex.com/support/support-overview.html or by phone at +1-866-229-3239 or +1-408-435-7088. Customers outside of the United States can reference the following link for local support numbers: http://support.webex.com/support/phone-numbers.html Exploitation and Public Announcements ===================================== The Cisco PSIRT is not aware of malicious use of the vulnerabilities described in this advisory. These vulnerabilities were discovered and reported to Cisco by Xiaopeng Zhang and Zhenhua Liu of Fortinet's FortiGuard Labs. The FortiGuard Labs advisory is available at http://www.fortiguard.com. Cisco would like to thank FortiGuard Labs for reporting these vulnerabilities to us and for working with us on a coordinated disclosure. Status of this Notice: FINAL ============================ 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. A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors. Distribution ============ This advisory is posted on Cisco's worldwide website at: http://www.cisco.com/warp/public/707/cisco-sa-20091216-webex.shtml In addition to worldwide web posting, a text version of this notice is clear-signed with the Cisco PSIRT PGP key and is posted to the following e-mail and Usenet news recipients. * cust-security-announce@cisco.com * first-bulletins@lists.first.org * bugtraq@securityfocus.com * vulnwatch@vulnwatch.org * cisco@spot.colorado.edu * cisco-nsp@puck.nether.net * full-disclosure@lists.grok.org.uk * comp.dcom.sys.cisco@newsgate.cisco.com Future updates of this advisory, if any, will be placed on Cisco's worldwide website, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the above URL for any updates. Revision History ================ +------------------------------------------------------------+ | Revision 1.0 | 2009-December-16 | Initial public release | +------------------------------------------------------------+ Cisco Security Procedures ========================= Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html. This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at http://www.cisco.com/go/psirt. +-------------------------------------------------------------------- Copyright 2008-2009 Cisco Systems, Inc. All rights reserved. +-------------------------------------------------------------------- Updated: Dec 16, 2009 Document ID: 110946 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAkspCQMACgkQ86n/Gc8U/uCn+QCeLaUWmiHsetXDoJsynUbgsmHs IDgAnRhmTkrcs2NhAQ7Dq8+eJqofkHSh =KaHv -----END PGP SIGNATURE-----

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

buffer overflow

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Xiaopeng ZhangZhenhua Liu※ zhliu@fortinet.com

SOURCES

LAST UPDATE DATE

2024-11-23T21:47:37.376000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE