bugtraq - ZDI-08-020: Microsoft GDI WMF Parsing Heap Overflow Vulnerability

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Message-ID: <OFA7B805B9.D8B5C6E7-ON88257425.006642D1-86257425.0067E771@3com.com>
Date: Tue, 8 Apr 2008 13:54:55 -0500
From: zdi-disclosures@...m.com
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Cc: zdi-disclosures@...m.com
Subject: ZDI-08-020: Microsoft GDI WMF Parsing Heap Overflow Vulnerability

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@...zworld.org)

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