This indicates an attack attempt to exploit a buffer overflow vulnerability in Microsoft SQL Server.
The vulnerability is located in the "sqlvdir.dll" ActiveX control through miss-use of "Connect" method. It may allow remote attackers to execute arbitrary code in the context of the application using the affected ActiveX control. Failed exploit attempts will likely cause the web browser to crash, resulting in a denial of service condition.
Microsoft SQL Server 2000
Microsoft SQL Server 2000 SP1
Microsoft SQL Server 2000 SP2
Microsoft SQL Server 2000 SP3
Microsoft SQL Server 2000 SP3a
Microsoft SQL Server 2000 SP4
System Compromise: Remote attackers can gain control of vulnerable systems.
Upgrade to the latest version, available from the vendor web site.
Disable the ActiveX Control (CLSID FC13BAA2-9C1A-4069-A221-31A147636038) by setting its kill bit: