Eltima Software Virtual Serial Port (VSPAX) ActiveX control (VSPort.DLL) allows remote attackers to cause a denial of service via certain function calls, as demonstrated via the (1) Attach, (2) Write, and (3) WriteStr functions.Referenceshttp://www.securityfocus.com/archive/1/473187http://www.securityfocus.com/bid/24827http://osvdb.org/43775