Memory leak in the Privilege Attribute Certificate (PAC) responder plugin (sssd_pac_plugin.so) in System Security Services Daemon (SSSD) 1.10 before 1.13.1 allows remote authenticated users to cause a denial of service (memory consumption) via a large number of logins that trigger parsing of PAC blobs during Kerberos authentication.
https://fedorahosted.org/sssd/wiki/Releases/Notes-1.13.1
https://fedorahosted.org/sssd/ticket/2803
https://fedorahosted.org/sssd/attachment/ticket/2803/0001-Fix-memory-leak-in-sssdpac_verify.patch
https://bugzilla.redhat.com/show_bug.cgi?id=1267580
http://www.securitytracker.com/id/1034038
http://www.securityfocus.com/bid/77529
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://rhn.redhat.com/errata/RHSA-2015-2355.html
http://rhn.redhat.com/errata/RHSA-2015-2019.html
http://permalink.gmane.org/gmane.linux.redhat.sssd.user/3422
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169613.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169597.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169110.html