__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN IBM Lotus Domino Web Access Vulnerability [US-CERT Vulnerability Note VU#963889] December 21, 2007 21:00 GMT Number S-094 ______________________________________________________________________________ PROBLEM: The IBM Lotus Domino Web Access ActiveX control contains multiple stack buffer overflow vulnerabilities, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. PLATFORM: IBM Lotus Domino Web Access DAMAGE: May allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. SOLUTION: There is currently no solution. Please see bulletin below for workarounds. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. May allow a remote, unauthenticated ASSESSMENT: attacker to execute arbitrary code on a vulnerable system. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/s-094.shtml ORIGINAL BULLETIN: http://www.kb.cert.org/vuls/id/963889 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2007-4474 ______________________________________________________________________________ [***** Start US-CERT Vulnerability Note VU#963889 *****] Vulnerability Note VU#963889 IBM Lotus Domino Web Access ActiveX control stack buffer overflow Overview The IBM Lotus Domino Web Access ActiveX control contains multiple stack buffer overflow vulnerabilities, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. I. Description IBM Lotus Domino includes an ActiveX control called Domino Web Access, which is used for uploading files and clearing the cache on logout. The Domino Web Access is provided by the files inotes6.dll and inotes6w.dll for Domino 6.x, and dwa7.dll or dwa7W.dll for Domino 7.x. The Domino Web Access ActiveX control contains multiple stack buffer overflows. 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 the web browser to crash. III. Solution We are currently unaware of a practical solution to this problem. Please consider the following workarounds Disable the Domino Web Access ActiveX controls in Internet Explorer The vulnerable ActiveX controls can be disabled in Internet Explorer by setting the kill bit for the following CLSIDs: {3BFFE033-BF43-11d5-A271-00A024A51325} {E008A543-CEFB-4559-912F-C27C2B89F13B} 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\ {3BFFE033-BF43-11d5-A271-00A024A51325}] "Compatibility Flags"=dword:00000400 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\ {E008A543-CEFB-4559-912F-C27C2B89F13B}] "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 IBM Corporation Vulnerable 21-Dec-2007 Lotus Software Vulnerable 21-Dec-2007 References http://www.cert.org/tech_tips/securing_browser/#Internet_Explorer http://lists.grok.org.uk/pipermail/full-disclosure/2007-December/059233.html http://support.microsoft.com/kb/240797 Credit This vulnerability was reported by Will Dormann of the CERT/CC. It was also independently discovered and publicly disclosed by Elazar Broad. This document was written by Will Dormann. Other Information Date Public 12/20/2007 Date First Published 12/21/2007 10:07:31 AM Date Last Updated 12/21/2007 CERT Advisory CVE Name CVE-2007-4474 Metric 27.34 Document Revision 7 [***** End US-CERT Vulnerability Note VU#963889 *****] _______________________________________________________________________________ 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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