Bug 800597 - (CVE-2012-1138) CVE-2012-1138 freetype: heap OOB read in the MIRP instruction implementation in TTF BCI (#35646)
CVE-2012-1138 freetype: heap OOB read in the MIRP instruction implementation ...
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
: ---
: ---
Assigned To: Red Hat Product Security
impact=low,public=20120227,reported=2...
: Security
Depends On: 806270 806271 889398
Blocks: 800639
  Show dependency treegraph
 
Reported: 2012-03-06 13:55 EST by Jan Lieskovsky
Modified: 2015-07-31 11:21 EDT (History)
6 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Environment:
Last Closed: 2015-02-24 17:03:35 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:


Attachments (Terms of Use)

  None (edit)
Description Jan Lieskovsky 2012-03-06 13:55:15 EST
An out-of heap-based buffer read flaw was found in the way TrueType bytecode / opcode interpreter of FreeType font rendering engine executed the 'Move Indirect Relative Point' (MIRP) instruction. A remote attacker could provide a specially-crafted 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/?35646

Upstream patch:
[2] http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=a33c013fe2dc6e65de2879682201d9c155292349

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 15:56:01 EST
Added CVE as per http://www.openwall.com/lists/oss-security/2012/03/06/16
Comment 2 Tomas Hoger 2012-03-14 13:27:57 EDT
This flaw is in the TrueType bytecode interpreter (BCI) implementation.  BCI is not enabled in Red Hat Enterprise Linux 4, 5, and 6 freetype packages (it was disabled by default upstream because of the patent concerns).  BCI support is now enabled by default in upstream versions 2.4 and later, as relevant patents expired: http://www.freetype.org/patents.html

Statement:

Not vulnerable. This issue did not affect freetype packages as shipped with Red Hat Enterprise Linux 5 and 6, as they do not enable TrueType bytecode interpreter.

Note You need to log in before you can comment on or make changes to this bug.