The good_client function in rquotad (rquota_svc.c) in Linux DiskQuota (aka quota) before 3.17 invokes the hosts_ctl function the first time without a host name, which might allow remote attackers to bypass TCP Wrappers rules in hosts.deny.
kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
linuxquota.git.sourceforge.net/git/gitweb.cgi?p=linuxquota/linuxquota%3Ba=commitdiff%3Bh=0abbfe92536fa5854eb65572de0cf131f80e2387
rhn.redhat.com/errata/RHSA-2013-0120.html
sourceforge.net/tracker/?func=detail&aid=2743481&group_id=18136&atid=118136
www.openwall.com/lists/oss-security/2012/07/19/2
www.openwall.com/lists/oss-security/2012/07/19/5
bugzilla.redhat.com/show_bug.cgi?id=566717
hermes.opensuse.org/messages/15509723