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Insecure Library Loading
Extremely critical

Microsoft Vector Graphics Rendering Library Buffer Overflow

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Description


A vulnerability has been discovered in Microsoft Windows, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error in the Microsoft Vector Graphics Rendering(VML) library (vgx.dll) when processing certain content in Vector Markup Language (VML) documents. This can be exploited to cause a stack-based buffer overflow by e.g. tricking a user into viewing a malicious VML document containing an overly long "fill" method inside a "rect" tag with the Internet Explorer browser.

Successful exploitation allows execution of arbitrary code with the privileges of the application using the vulnerable functionality in the library.

NOTE: The vulnerability is currently being actively exploited.

The vulnerability is confirmed on a fully patched Microsoft Windows XP SP2 system. Other versions may also be affected.

According to Microsoft, other unspecified vulnerabilities also exist.


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Discovered as a 0-day.

Sample exploit provided by Sunbelt Software.

Original Advisory:
MS06-055 (KB925486):
http://www.microsoft.com/technet/security/Bulletin/MS06-055.mspx

Microsoft:
http://www.microsoft.com/technet/security/advisory/925568.mspx

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 Vector Graphics Rendering Library Buffer Overflow

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