This indicates an attack attempt to exploit a Denial of Service Vulnerability in Red Hat 389 Directory Server.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted request. A remote attacker may be able to exploit this to cause a denial of service condition on the affected system.
Red Hat 389 Directory Server 126.96.36.199 and prior
Red Hat 389 Directory Server 188.8.131.52 and prior
Denial of Service: Remote attackers can crash vulnerable systems.
Apply the most recent upgrade or patch from the vendor: