__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Creative Software AutoUpdate Engine ActiveX Vulnerability [US-CERT Vulnerability Note VU#501843] May 30, 2008 13:00 GMT Number S-303 ______________________________________________________________________________ PROBLEM: The Creative Labs AutoUpdate Engine ActiveX control contains a stack buffer overflow, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. PLATFORM: Creative Labs DAMAGE: Execute arbitrary code. SOLUTION: Currently there is no practical solution to this problem. Please consider the workarounds in the bulletin below. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. By convincing a user to view a specially ASSESSMENT: crafted HTML document (e.g., a web page or an HTML email message or attachment), an attacker may be able to execute arbitrary code with the privileges of the user. ______________________________________________________________________________ CVSS 2 BASE SCORE: 5.8 TEMPORAL SCORE: 5.0 VECTOR: (AV:N/AC:M/Au:N/C:P/I:P/A:N/E:POC/RL:W/RC:C) ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/s-303.shtml ORIGINAL BULLETIN: http://www.kb.cert.org/vuls/id/501843 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2008-0955 ______________________________________________________________________________ [***** Start US-CERT Vulnerability Note VU#501843 *****] Vulnerability Note VU#501843 Creative Software AutoUpdate Engine ActiveX stack buffer overflow Overview The Creative Labs AutoUpdate Engine ActiveX control contains a stack buffer overflow, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. I. Description The Creative Software AutoUpdate Engine ActiveX control is a component that provides automatic update capabilities to Creative Labs software. This ActiveX control is provided by the file CTSUEng.ocx. The Create Software AutoUpdate Engine ActiveX control is marked Safe For Scripting and Safe For Initialization, which means that a web page in Internet Explorer has the ability to interact with the control. This ActiveX control contains a stack buffer overflow in the CacheFolder property. Exploit code for this vulnerability is publicly available. II. Impact By convincing a user to view a specially crafted HTML document (e.g., a web page or an HTML email message or attachment), an attacker may be able to execute arbitrary code with the privileges of the user. III. Solution We are currently unaware of a practical solution to this problem. Please consider the following workarounds: Disable the Creative Software AutoUpdate ActiveX control in Internet Explorer The vulnerable ActiveX control can be disabled in Internet Explorer by setting the kill bit for the following CLSID: {0A5FD7C5-A45C-49FC-ADB5-9952547D5715} More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG file and imported to set the kill bit for this control: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\ {0A5FD7C5-A45C-49FC-ADB5-9952547D5715}] "Compatibility Flags"=dword:00000400 Disable ActiveX Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this and other ActiveX vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document. Systems Affected Vendor Status Date Updated Creative Labs Vulnerable 26-May-2008 References http://www.cert.org/tech_tips/securing_browser/ http://support.microsoft.com/kb/240797 Credit Thanks to Greg Linares of eEye Digital Security for reporting this vulnerability. This document was written by Will Dormann. Other Information Date Public 05/27/2008 Date First Published 05/27/2008 11:04:12 AM Date Last Updated 05/28/2008 CERT Advisory CVE Name CVE-2008-0955 US-CERT Technical Alerts Metric 9.87 Document Revision 16 [***** End US-CERT Vulnerability Note VU#501843 *****] _______________________________________________________________________________ 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. 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