This indicates an attempt to exploit a buffer overflow vulnerability in GlobalLink's 'GLChat.ocx' ActiveX control.
The buffer overflow occurs when a long argument is passed to the 'ChatRoom' variable. An attacker can exploit this issue to execute arbitrary code on a target host or cause a denial of service by crashing their web browser.
GlobalLink 'GLChat.ocx' ActiveX control.
System Compromise: remote attackers can gain control of vulnerable systems.
Denial of service.
Upgrade to the latest version.
Set the kill bit on the vulnerable ActiveX control.