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iDEFENSE Security Advisory 2008-03-11.3

iDEFENSE Security Advisory 2008-03-11.3
Posted Mar 13, 2008
Authored by iDefense Labs, Greg MacManus | Site idefense.com

iDefense Security Advisory 03.11.08 - Remote exploitation of an input validation error in the handling of "mailto" URIs by Microsoft Corp.'s Outlook may allow arbitrary code execution. It is possible to construct a "mailto" URI which causes the web browser to pass extra command line switches to Outlook. These switches can modify Outlook's account configuration. iDefense has confirmed the existence of this vulnerability in Microsoft Outlook 2007 on Windows XP SP2. Previous versions may also be affected.

tags | advisory, remote, web, arbitrary, code execution
systems | windows
advisories | CVE-2008-0110
SHA-256 | 7156ee06ae2b1666a162d1ef60b7458511c3b4ab23d425ed51aebc8ea63bd76b

iDEFENSE Security Advisory 2008-03-11.3

Change Mirror Download
iDefense Security Advisory 03.11.08
http://labs.idefense.com/intelligence/vulnerabilities/
Mar 11, 2008

I. BACKGROUND

Microsoft Outlook provides an integrated solution for managing and
organizing e-mail messages, schedules, tasks, notes, contacts, and
other information. More information is available at the following URL.

http://office.microsoft.com/outlook/

II. DESCRIPTION

Remote exploitation of an input validation error in the handling of
"mailto" URIs by Microsoft Corp.'s Outlook may allow arbitrary code
execution.

It is possible to construct a "mailto" URI which causes the web browser
to pass extra command line switches to Outlook. These switches can
modify Outlook's account configuration.

III. ANALYSIS

Exploitation of this vulnerability may allow an attacker to access
sensitive information or take complete control of an affected system.
In order to exploit this vulnerability, an attacker would have to
convince a user to view an attacker-controlled website.

IV. DETECTION

iDefense has confirmed the existence of this vulnerability in Microsoft
Outlook 2007 on Windows XP SP2. Previous versions may also be affected.

V. WORKAROUND

Disabling the "mailto" URI handler will prevent exploitation of this
vulnerability. However, doing so will also disable e-mail links within
all applications.

VI. VENDOR RESPONSE

Microsoft has addressed this vulnerability with Security Bulletin
MS08-015. For more information, consult their bulletin at the following
URL.

http://www.microsoft.com/technet/security/Bulletin/ms08-015.mspx

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2008-0110 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

07/03/2007 Initial vendor notification
07/03/2007 Initial vendor response
03/11/2008 Coordinated public disclosure

IX. CREDIT

This vulnerability was discovered by Greg MacManus of iDefense Labs.

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events
http://labs.idefense.com/

X. LEGAL NOTICES

Copyright © 2008 iDefense, Inc.

Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically,
please e-mail customerservice@idefense.com for permission.

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, this information.
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