The slapi-nis plug-in before 0.54.2 does not properly reallocate memory when processing user accounts, which allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a request for a (1) group with a large number of members or (2) user that belongs to a large number of groups.
https://git.fedorahosted.org/cgit/slapi-nis.git/commit/?id=6573f91c95f7a353ad3bdf2fe95b0c15932aa097
https://bugzilla.redhat.com/show_bug.cgi?id=1195729
http://www.securityfocus.com/bid/73377
http://rhn.redhat.com/errata/RHSA-2015-0728.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/154103.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154314.html