libpam-pgsql (aka pam_pgsql) 0.7 does not properly handle a NULL value returned by the password search query, which allows remote attackers to bypass authentication via a crafted password.
https://exchange.xforce.ibmcloud.com/vulnerabilities/81363
http://www.securityfocus.com/bid/57440
http://sourceforge.net/p/pam-pgsql/bugs/13/
http://seclists.org/oss-sec/2013/q1/99
http://seclists.org/oss-sec/2013/q1/86
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html