Messenger Agents (nmma.exe) in Novell GroupWise 2.0.2 and 1.0.6 allows remote attackers to cause a denial of service (crash) via a crafted HTTP POST request to TCP port 8300 with a modified val parameter, which triggers a null dereference related to "zero-size strings in blowfish routines."
https://exchange.xforce.ibmcloud.com/vulnerabilities/29319
http://www.vupen.com/english/advisories/2006/3893
http://www.securityfocus.com/bid/20316
http://www.kb.cert.org/vuls/id/796956
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=416
http://support.novell.com/cgi-bin/search/searchtid.cgi?/2974452.htm