There is a memory corruption vulnerability in TIFF file processing in Microsoft GDI+ that can be used to crash a vulnerable application and also to execute arbitrary code.
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Zero Day Initiative Advisory 09-072 - 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 image file or browse to a malicious website. The specific flaws exist in the GDI+ subsystem when parsing maliciously crafted TIFF files. By supplying a malformed graphic control extension an attacker can trigger an exploitable memory corruption condition. Successful exploitation can result in arbitrary code execution under the credentials of the currently logged in user.
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