Stack-based buffer overflow in the SetClientInfo function in the CDDBControlAOL.CDDBAOLControl ActiveX control (cddbcontrol.dll), as used in America Online (AOL) 7.0 4114.563, 8.0 4129.230, and 9.0 Security Edition 4156.910, and possibly other products, allows remote attackers to execute arbitrary code via a long ClientId argument.