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.
Created freetype tracking bugs for this issue:
Affects: fedora-all [bug 1191193]
freetype-2.5.3-15.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.
freetype-2.5.0-9.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
Upstream bug is:
Issue was fixed upstream in 2.5.4.
This issue possibly leads to disclosure of portion of process memory. Leaked information is heap pointer, so it may provide information to bypass address space layout randomization (ASLR) and hence make it easier to exploit other flaws in the application.
This issue has been addressed in the following products:
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Via RHSA-2015:0696 https://rhn.redhat.com/errata/RHSA-2015-0696.html