Integer overflow in Avifil32.dll in the Windows Media file handling functionality in Microsoft Windows allows remote attackers to execute arbitrary code on a Windows 2000 SP4 system via a crafted AVI file, or cause a denial of service on a Windows XP SP2 or SP3, Server 2003 SP2, Vista Gold, SP1, or SP2, or Server 2008 Gold or SP2 system via a crafted AVI file, aka "AVI Integer Overflow Vulnerability."