The user.login function in Zabbix before 1.8.16 and 2.x before 2.0.5rc1 allows remote attackers to override LDAP configuration via the cnf parameter.
http://secunia.com/advisories/55824
http://security.gentoo.org/glsa/glsa-201311-15.xml
http://www.securityfocus.com/bid/57471
http://www.zabbix.com/rn1.8.16.php