ZDI-08-049: Microsoft Windows Graphics Rendering Engine PICT Heap Corruption Aug 12 2008 09:43PM
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ZDI-08-049: Microsoft Windows Graphics Rendering Engine PICT Heap



August 12, 2008

-- CVE ID:


-- Affected Vendors:


-- 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 (at) overflow (dot) pl [email concealed]>

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