This indicates an attack attempt to exploit a Denial of Service vulnerability in SAP Netweaver.
The vulnerability is due to a lack input validation when handling requests. A remote attack may be able to exploit this to cause a denial of service condition on the affected system, by sending a crafted request to the vulnerable application.
SAP NetWeaver 7.0 EHP1 and prior
SAP NetWeaver 7.0 EHP2 and prior
Denial of Service: Remote attackers can crash vulnerable systems.
Apply the most recent upgrade or patch from the vendor.