The rad_print_request function in logger.c for GNU Radius daemon (radiusd) before 1.2 allows remote attackers to cause a denial of service (crash) via a UDP packet with an Acct-Status-Type attribute without a value and no Acct-Session-Id attribute, which causes a null dereference.
https://exchange.xforce.ibmcloud.com/vulnerabilities/15046
http://www.securityfocus.com/bid/9578
http://www.kb.cert.org/vuls/id/277396
http://www.idefense.com/application/poi/display?id=71&type=vulnerabilities&flashstatus=true