This indicates an attack attempt to exploit a Denial of Service vulnerability in WebLog Expert Web Server Enterprise.
The vulnerability is due to an error when handling malformed HTTP requests. A remote attacker may be able to exploit this to cause a denial of service condition on the vulnerable software, via a crafted HTTP request.
WebLog Expert Web Server Enterprise v9.4
Denial of Service: Remote attackers can crash vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue.