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iDefense Security Advisory 05.24.11: IBM Lotus Notes Applix Attachment Viewer Stack Buffer Overflow
iDefense Security Advisory 05.24.11
May 24, 2011
IBM Corp.'s Lotus Notes software is an integrated desktop client option
for accessing e-mail, calendars and applications on an IBM Corp. Lotus
Domino server. More information can be found by visiting the URL below.
<BR> <BR> http://www-01.ibm.com/software/lotus/
Remote exploitation of a stack buffer overflow vulnerability in IBM
Corp.'s Lotus Notes could allow an attacker to execute arbitrary code in
the context of the current user. <BR> <BR> The vulnerability occurs
during the processing of tag information contained within an Applix
document. A memory copy operation within a loop may cause tag data to
overflow the bounds of a stack buffer. This condition may lead to
arbitrary code execution.
Exploitation of this vulnerability results in the execution of arbitrary
code in the context of the user opening an attachment delivered via
email. In order to be successful, an attacker must social engineer the
victim into processing a specially crafted email attachment in a certain
way. Specifically, the victim must open the attachment and click the
view button on the attachment dialog box.
Lotus Notes versions 6.0, 6.5, 7.0, 8.0, 8.5 are vulnerable.
A workaround is available to disable Applix Documents within the Lotus
Notes file viewer: <BR> <BR> Open the keyview.ini file in the Lotus
Notes program data directory (C:\Program Files\IBM\Lotus\Notes\Data) and
comment out all references to assr.dll. To comment out a reference,
proceed the line with a semi-colon ';'.
VI. VENDOR RESPONSE
IBM has released patches and workarounds to address this vulnerability.
For more information, consult their advisory at the following URL.
VII. CVE INFORMATION
A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.
VIII. DISCLOSURE TIMELINE
07/14/2010 Initial Vendor Notification
07/27/2010 Initial Vendor Reply
05/24/2011 Coordinated Public Disclosure
This vulnerability was reported to iDefense by binaryhouse.net.
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X. LEGAL NOTICES
Copyright Â© 2011 Verisign
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Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on,