ncp in Novell eDirectory before 8.7.3 SP9, and 8.8.x before 8.8.1 FTF2, does not properly handle NCP fragments with a negative length, which allows remote attackers to cause a denial of service (daemon crash) when the heap is written to a log file.
https://exchange.xforce.ibmcloud.com/vulnerabilities/33921
http://www.vupen.com/english/advisories/2007/1550
http://www.securitytracker.com/id?1017972
http://www.securityfocus.com/bid/23685
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=518