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ZDI-08-020: Microsoft GDI WMF Parsing Heap Overflow Vulnerability
From: zdi-disclosures () 3com com
Date: Tue, 8 Apr 2008 13:54:55 -0500

ZDI-08-020: Microsoft GDI WMF Parsing Heap Overflow Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-08-020


-- CVE ID:
CVE-2008-1083

-- Affected Vendors:
Microsoft

-- Affected Products:
Microsoft Windows XP SP2
Microsoft Windows 2003 SP1
Microsoft Windows Vista

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Microsoft Windows. User interaction is
required in that a user must open a malicious file or visit a malicious
web page.

The specific flaw exists within the parsing of malformed WMF files. A
vulnerability exists in the GDI funcion CreateDIBPatternBrushPt used
when processing WMF files.  Due to a mis-calculation of user data a heap
chunk can be under-allocated and later used resulting in a heap
overflow. Successful exploitation can result in system compromise 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/ms08-021.mspx

-- Disclosure Timeline:
2008-02-07 - Vulnerability reported to vendor


-- Credit:
This vulnerability was discovered by:
    * Sebastian Apelt (webmaster () buzzworld org)

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TippingPoint provides its customers with zero day protection through
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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
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Our vulnerability disclosure policy is available online at:

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