Secunia Research: Microsoft Outlook Content Parsing Integer Underflow Vulnerability



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Secunia Research 14/09/2010

- Microsoft Outlook Content Parsing Integer Underflow Vulnerability -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

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1) Affected Software

* Microsoft Outlook 2002 SP3
* Microsoft Outlook 2003 SP3
* Microsoft Outlook 2007 SP2

NOTE: Other versions may also be affected.

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2) Severity

Rating: Highly critical
Impact: System access
Where: From remote

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3) Vendor's Description of Software

"Manage your time and information, connect across boundaries and
protect your information with Outlook".

Product Link:
http://office.microsoft.com/outlook/default.aspx

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in Microsoft Outlook,
which can be exploited by malicious people to compromise a user's
system.

The vulnerability is caused by an integer underflow error when parsing
certain content and can be exploited to cause a heap-based buffer
overflow via e.g. a specially crafted e-mail message.

Successful exploitation may allow execution of arbitrary code, but
requires that Outlook is connected to an Exchange server with Online
Mode (not default setting for Outlook 2003 and 2007).

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5) Solution

Apply patches provided by MS10-064.

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6) Time Table

24/02/2009 - Vendor notified.
27/02/2009 - Vendor response.
05/03/2009 - Vendor provides status update (having problems
reproducing the reported vulnerability).
06/03/2009 - Additional details and crash dump provided to vendor.
22/05/2009 - Vendor provides status update (still investigating).
12/08/2009 - Vendor provides status update (vulnerability confirmed).
24/09/2009 - Vendor provides status update (scheduled for December).
29/10/2009 - Vendor provides status update (still scheduled for
December, but may slip to February 2010).
18/12/2009 - Vendor provides status update (scheduled for March 2010).
12/02/2010 - Vendor provides status update (scheduled for April).
04/03/2010 - Vendor provides status update (scheduled for April).
06/04/2010 - Vendor provides status update (slipped April release due
to last minute problems).
07/08/2010 - Vendor provides status update (scheduled for September).
03/09/2010 - Vendor provides status update (scheduled for September).
08/09/2010 - Vendor provides status update (scheduled for September).
14/09/2010 - Public disclosure.

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7) Credits

Discovered by Dyon Balding, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2010-2728 for the vulnerability.

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9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://secunia.com/advisories/business_solutions/

Secunia also provides a publicly accessible and comprehensive advisory
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http://secunia.com/advisories/mailing_lists/

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10) Verification

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2009-15/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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