SAPLPD 6.28 and earlier included in SAP GUI 7.10 and SAPSprint before 1018 allows remote attackers to cause a denial of service (crash) via a 0x53 LPD command, which causes the server to terminate.
http://www.vupen.com/english/advisories/2008/0438
http://www.vupen.com/english/advisories/2008/0409
http://www.securitytracker.com/id?1019300
http://www.securityfocus.com/archive/1/487575/100/0/threaded
http://www.securityfocus.com/archive/1/487508/100/0/threaded
http://securityreason.com/securityalert/3619