bdf/bdflib.c in FreeType before 2.5.4 identifies property names by only verifying that an initial substring is present, which allows remote attackers to discover heap pointer values and bypass the ASLR protection mechanism via a crafted BDF font.
http://www.ubuntu.com/usn/USN-2739-1
http://www.ubuntu.com/usn/USN-2510-1
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:055
http://www.debian.org/security/2015/dsa-3188
http://rhn.redhat.com/errata/RHSA-2015-0696.html
http://lists.opensuse.org/opensuse-updates/2015-03/msg00091.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-February/150162.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-February/150148.html