Kadu 0.4.2 and 0.5.0pre allows remote attackers to cause a denial of service (crash or generated traffic) via a malformed message, possibly with incomplete information.
https://exchange.xforce.ibmcloud.com/vulnerabilities/23258
http://www.vupen.com/english/advisories/2005/2648
http://www.securityfocus.com/bid/15620
http://www.securityfocus.com/archive/1/417920/100/0/threaded