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full-disclosure-uk: [Full-disclosure] ZDI-08-049: Microsoft Wind

[Full-disclosure] ZDI-08-049: Microsoft Windows Graphics Rendering Engine PICT Heap Corruption

From: <zdi-disclosures_at_nospam>
Date: Tue Aug 12 2008 - 21:43:24 GMT
To: full-disclosure@lists.grok.org.uk, bugtraq@securityfocus.com

ZDI-08-049: Microsoft Windows Graphics Rendering Engine PICT Heap Corruption
http://www.zerodayinitiative.com/advisories/ZDI-08-049 August 12, 2008

  • CVE ID: CVE-2008-3021
  • Affected Vendors: Microsoft
  • Affected Products: Microsoft File Format Vulnerability
  • TippingPoint(TM) IPS Customer Protection: TippingPoint IPS customers have been protected against this vulnerability by Digital Vaccine protection filter ID 4665. For further product information on the TippingPoint IPS, visit:


  • Vulnerability Details: A potential vulnerability exists in the Microsoft Office Suite. The issue is a result of insufficient bounds checking on the content of PICT files embedded into documents. Successful exploitation of this issue enables an attacker to remotely execute arbitrary code on a target system. User interaction would be required, as an attacker would have to convince the target user to open a malformed file.

One of the filter DLLs for processing image files in Microsoft Office suffers from a potentially-exploitable memory corruption condition when processing .PICT images. An invalid value in the bits_per_pixel field (offset 0x257) causes heap corruption. Different values of this field result in distinctly different types of corruption. Internally, the issue was only reproducible when the malformed image was directly inserted into an Office document by the target user.

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


  • Disclosure Timeline: 2006-09-14 - Vulnerability reported to vendor 2008-08-12 - Coordinated public release of advisory
  • Credit: This vulnerability was discovered by:
    • Damian Put <pucik@overflow.pl>
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