Bug 800594 (CVE-2012-1136)

Summary: CVE-2012-1136 freetype: uninitialized pointer use in BDF parser _bdf_parse_glyphs() (#35641)
Product: [Other] Security Response Reporter: Jan Lieskovsky <jlieskov>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: behdad, fonts-bugs, jrusnack, kevin, mkasik
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2015-02-24 21:02:21 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 806266, 806267, 806268, 806269, 806270, 806271, 889398    
Bug Blocks: 800639    

Description Jan Lieskovsky 2012-03-06 18:53:45 UTC 
An out-of heap-based buffer write flaw was found in the way FreeType font rendering engine performed parsing of glyph and bitmaps information for glyph bitmap distribution format (BDF) font files, that were missing definition of the ENCODING field. 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, or, potentially arbitrary code execution with the privileges of the user running the application.

Upstream bug report:
[1] https://savannah.nongnu.org/bugs/?35641

Upstream patch:
[2] http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=4086fb7caf41e33137e548e43a49a97b127cd369

Acknowledgements:

Red Hat would like to thank Mateusz Jurczyk of the Google Security Team for reporting this issue.
Comment 1 Kurt Seifried 2012-03-06 20:54:17 UTC 
Added CVE as per http://www.openwall.com/lists/oss-security/2012/03/06/16
Comment 2 Jan Lieskovsky 2012-03-15 16:27:36 UTC 
This issue affects the versions of the freetype package, as shipped with Red Hat Enterprise Linux 5 and 6.

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This issue affects the versions of the freetype package, as shipped with Fedora release of 15 and 16.
Comment 7 Tomas Hoger 2012-03-16 12:59:34 UTC 
This occurs when parsing glyphs that use DWIDTH and BBOX parameters before/without specifying ENCODING parameter.
Comment 8 errata-xmlrpc 2012-04-10 19:59:05 UTC 
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