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Date: Tue, 9 Dec 2008 15:09:35 -0600
From: zdi-disclosures@...m.com
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Cc: zdi-disclosures@...m.com
Subject: ZDI-08-085: Microsoft Office RTF Drawing Object Heap Overflow Vulnerability

ZDI-08-085: Microsoft Office RTF Drawing Object Heap Overflow 
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-08-085
December 9, 2008

-- CVE ID:
CVE-2008-4028

-- Affected Vendors:
Microsoft

-- Affected Products:
Microsoft Office Word
Microsoft Outlook

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 6611. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of various Microsoft products including Word,
Outlook and WordPad. User interaction is required to exploit this
vulnerability in that the target must visit a malicious page, open a
malicious e-mail, or open a malicious file.

The specific flaw exists within the parsing of RTF documents containing
multiple drawing object tags. First, code within wwlib.dll allocates a
buffer for the tag object. Later, a result from a call into mso.dll is
copied into the same buffer but with a larger size than was allocated by
the callee. Successful exploitation can lead to remote compromise of a
system under the credentials of the currently logged in user.

-- Vendor Response:
Microsoft has issued an update to correct this vulnerability. More
details can be found at:

http://www.microsoft.com/technet/security/bulletin/MS08-072.mspx

-- Disclosure Timeline:
2008-06-25 - Vulnerability reported to vendor
2008-12-09 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * wushi of team509

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents 
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

    http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

    http://www.zerodayinitiative.com/advisories/disclosure_policy/

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