ovalarmsrv in HP OpenView Network Node Manager (OV NNM) 7.51, 7.53, and possibly other versions allows remote attackers to cause a denial of service (crash) via certain requests that specify a large number of sub-arguments, which triggers a NULL pointer dereference due to memory allocation failure.
https://exchange.xforce.ibmcloud.com/vulnerabilities/41695
http://www.vupen.com/english/advisories/2008/1214/references
http://www.securitytracker.com/id?1019839