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AUSCERT External Security Bulletin Redistribution
ESB-2007.1052 -- [Win]
IBM Lotus Domino Web Access ActiveX control stack buffer overflow
28 December 2007
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AusCERT Security Bulletin Summary
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Product: IBM Lotus Domino Web Access
Publisher: US-CERT
Operating System: Windows
Impact: Execute Arbitrary Code/Commands
Access: Remote/Unauthenticated
CVE Names: CVE-2007-4474
Original Bulletin: http://www.kb.cert.org/vuls/id/963889
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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://secunia.com/advisories/28184/
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 8
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