An array index error, leading to out-of stack-based buffer read flaw was found in the way FreeType font rendering engine processed certain glyph information for glyph bitmap distribution format (BDF) font files. A remote attacker could provide a specially-crafted BDF font file, which once opened in an application linked against FreeType would lead to that application crash. Upstream bug report: [1] https://savannah.nongnu.org/bugs/?35656 Upstream patch: [2] http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=6ac022dc750d95296a6f731b9594f2e751d997fa Acknowledgements: Red Hat would like to thank Mateusz Jurczyk of the Google Security Team for reporting this issue.
Added CVE as per http://www.openwall.com/lists/oss-security/2012/03/06/16
(In reply to comment #0) > An array index error, leading to out-of stack-based buffer read flaw Actually, it's not stack-based buffer, but a data segment one. Signed char variable is used to index the array, so it may lead to underflow / invalid array access up to 128 bytes before the beginning of the array. This is not very likely to trigger any crash, the problem is not reproducible with standard builds not using AddressSanitizer as was used by the reporter of the upstream bug.
(In reply to comment #0) > Upstream patch: > http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=6ac022dc750d95296a6f731b9594f2e751d997fa Additional related fix: http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=37b5c92f83e5da53707b20c10ef8e0d7a24924d9 See upstream bug for the discussion.
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Via RHSA-2012:0467 https://rhn.redhat.com/errata/RHSA-2012-0467.html