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Insecure Library Loading
Highly critical

Microsoft Windows WMF/EMF File Rendering Arbitrary Code Execution

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Description


Two vulnerabilities have been reported in Microsoft Windows, which can be exploited by malicious people to compromise a vulnerable system.

1) Some integer overflow errors exist in the Graphics Rendering Engine GDI32.DLL (e.g. MRBP16::bCheckRecord) when rendering certain malformed Windows Metafile (WMF) and Enhanced Metafile (EMF) image files. This can be exploited to cause a heap-based buffer overflow and allows arbitrary code execution on a user's system via a specially crafted WMF/EMF file.

2) An integer overflow error exists in the "PlayMetaFileRecord" function of GDI32.DLL when handling the "SetPaletteEntries" records in a Windows Metafile (WMF) image file. This can be exploited to cause a heap-based buffer overflow and allows arbitrary code execution on a user's system via a specially crafted WMF file.

Vulnerability #1 and #2 reportedly affects any program that renders the affected image types and can be exploited by e.g. tricking the user to open a malicious WMF/EMF file, or to view a folder that contains the image.

The vulnerabilities are also reportedly exploitable by embedding the image in an Office document, or by convincing the user to view an HTML email containing an image attachment in Outlook, or via a malicious web site.


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) eEye Digital Security.
2) Venustech AdDLab, eEye Digital Security, and Peter Ferrie of Symantec Security Response.

Original Advisory:
MS05-053 (KB896424):
http://www.microsoft.com/technet/security/Bulletin/MS05-053.mspx

eEye Digital Security:
http://www.eeye.com/html/research/advisories/AD20051108b.html
http://www.eeye.com/html/research/advisories/AD20051108a.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Microsoft Windows WMF/EMF File Rendering Arbitrary Code Execution

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