iml32.dll in Adobe Shockwave Player before 11.5.7.609 does not validate a certain value from a file before using it in file-pointer calculations, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted .dir (aka Director) file.
http://www.zerodayinitiative.com/advisories/ZDI-10-087/
http://www.adobe.com/support/security/bulletins/apsb10-12.html