__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Logitech VideoCall Vulnerabilities [US-CERT Vulnerability Note VU#330289] May 31, 2007 18:00 GMT Number R-256 ______________________________________________________________________________ PROBLEM: Logitech VideoCall ActiveX controls contain multiple stack buffer overflows, which could allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. PLATFORM: Logitech DAMAGE: Could allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. SOLUTION: Currently there is no practical solution to this problem. Please consider the workarounds in the bulletin below. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. Could allow a remote, unauthenticated ASSESSMENT: attacker to execute arbitrary code on a vulnerable system. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/r-256.shtml ORIGINAL BULLETIN: http://www.kb.cert.org/vuls/id/330289 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2007-2918 ______________________________________________________________________________ [***** Start US-CERT Vulnerability Note VU#330289 *****] Vulnerability Note VU#330289 Logitech VideoCall multiple ActiveX controls contain stack buffer overflows Overview Logitech VideoCall ActiveX controls contain multiple stack buffer overflows, which could allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. I. Description Logitech VideoCall is video conferencing software for Windows. Logitech VideoCall includes multiple ActiveX controls that contain multiple stack buffer overflows, including the following: VibeC (vibecontrol.dll) CallManager (StarClient.dll) ViewerClient (StarClient.dll) ComLink (uicomlink.dll) WebCamXMP (wcamxmp.dll) 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. The attacker could also cause Internet Explorer (or the program using the WebBrowser control) to crash. III. Solution We are currently unaware of a practical solution to this problem. Please consider the following workarounds Disable the VideoCall ActiveX controls in Internet Explorer The vulnerable ActiveX controls can be disabled in Internet Explorer by setting the kill bit for the following CLSIDs: {54da0fb5-483a-4c53-810b-f131d50a8eb6} {6577b09d-c39d-4e22-9913-c99803f9c388} {917b29f8-e72a-4761-8371-bf7fca27eb31} {bef0f488-3562-435f-8e89-79d94c9a528c} {bf4c7b03-f381-4544-9a33-cb6dad2a87cd} 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 these controls: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\ {54da0fb5-483a-4c53-810b-f131d50a8eb6}] "Compatibility Flags"=dword:00000400 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\ {6577b09d-c39d-4e22-9913-c99803f9c388}] "Compatibility Flags"=dword:00000400 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\ {917b29f8-e72a-4761-8371-bf7fca27eb31}] "Compatibility Flags"=dword:00000400 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\ {bef0f488-3562-435f-8e89-79d94c9a528c}] "Compatibility Flags"=dword:00000400 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\ {bf4c7b03-f381-4544-9a33-cb6dad2a87cd}] "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 Logitech Vulnerable 30-May-2007 References http://www.cert.org/tech_tips/securing_browser/#Internet_Explorer http://support.microsoft.com/kb/240797 Credit This vulnerability was reported by Will Dormann of CERT/CC. This document was written by Will Dormann. Other Information Date Public 05/31/2007 Date First Published 05/31/2007 11:20:04 AM Date Last Updated 05/31/2007 CERT Advisory CVE Name CVE-2007-2918 Metric 1.55 Document Revision 6 [***** End US-CERT Vulnerability Note VU#330289 *****] _______________________________________________________________________________ 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. 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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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