The LaunchObj ActiveX control before 5.2.2.865 in launcher.dll in Symantec AppStream Client 5.2.x before 5.2.2 SP3 MP1 does not properly validate downloaded files, which allows remote attackers to execute arbitrary code via the installAppMgr method and unspecified other methods.
http://www.symantec.com/avcenter/security/Content/2009.01.15.html
http://www.securityfocus.com/bid/33247