__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN MSN Messenger and Windows Live Messenger Webcam Vulnerability [US-CERT Vulnerability Note VU#166521] August 28, 2007 16:00 GMT Number R-332 ______________________________________________________________________________ PROBLEM: MSN Messenger fails to properly handle webcam streams, which may allow a remote attacker to execute arbitrary code. PLATFORM: Windows Live Messenger 8 DAMAGE: May allow a remote attacker to execute arbitrary code. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. May allow a remote attacker to execute ASSESSMENT: arbitrary code. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/r-332.shtml ORIGINAL BULLETIN: http://www.kb.cert.org/vuls/id/166521 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2007-2931 ______________________________________________________________________________ [***** Start US-CERT Vulnerability Note VU#166521 *****] Vulnerability Note VU#166521 MSN Messenger and Windows Live Messenger webcam stream heap overflow Overview MSN Messenger fails to properly handle webcam streams, which may allow a remote attacker to execute arbitrary code. I. Description MSN Messenger is an instant messaging application. Starting with version 8, MSN Messenger was renamed to Windows Live Messenger. Windows Live Messenger and some versions of MSN Messenger support the use of webcams. MSN Messenger and Windows Live Messenger appear to require user interaction to connect a webcam stream. MSN Messenger and Windows Live Messenger contain a heap overflow in the handling of a malformed webcam streams. Exploit code for this vulnerability is publicly available. II. Impact By convincing a user to accept a webcam invitation, a remote attacker may be able to execute arbitrary code with the privileges of the user. III. Solution Apply an update This issue is addressed in Windows Live Messenger 8.1. Do not accept webcam invitations If you are unable to install Windows Live Messenger 8.1, do not accept any webcam invitations, regardless of the source. Systems Affected Vendor Status Date Updated Microsoft Corporation Vulnerable 28-Aug-2007 References http://secunia.com/advisories/26570/ Credit This vulnerability was publicly reported by team509. This document was written by Will Dormann. Other Information Date Public 01/31/2007 Date First Published 08/28/2007 08:54:13 AM Date Last Updated 08/28/2007 CERT Advisory CVE Name CVE-2007-2931 Metric 3.54 Document Revision 6 [***** End US-CERT Vulnerability Note VU#166521 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of US-CERT for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) R-322: Vulnerabilities in Windows Gadgets R-323: Vulnerability in Virtual PC and Virtual Server R-324: Vulnerability in Vector Markup Language R-325: Information Leakage Using IPv6 Routing Header R-326: tcpdump R-327: Cisco IOS Secure Copy Authorization Bypass Vulnerability R-328: Local Privilege Vulnerabilities in Cisco VPN Client R-329: Trend Micro ServerProtect Agent Vulnerabilities R-330: Asterisk Security Vulnerabilities R-331: HP-UX Running the Ignite-UX or the DynRootDisk (DRD) get_system_info Command