[Bug 800607] CVE-2012-1144 freetype: insufficient checking of first outline point in TTF parser (#35689)
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bugzilla at redhat.com
Thu Mar 22 11:19:24 UTC 2012
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https://bugzilla.redhat.com/show_bug.cgi?id=800607
Tomas Hoger <thoger at redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|CVE-2012-1144 freetype: |CVE-2012-1144 freetype:
|Out-of heap-based buffer |insufficient checking of
|write in the TrueType |first outline point in TTF
|bytecode interpreter by |parser (#35689)
|moving zone2 pointer point |
|(FU#35689) |
Status Whiteboard|impact=important,public=201 |impact=moderate,public=2012
|20302,reported=20120302,sou |0302,reported=20120302,sour
|rce=google,cvss2=6.8/AV:N/A |ce=secalert,cvss2=5.1/AV:N/
|C:M/Au:N/C:P/I:P/A:P,rhel-5 |AC:H/Au:N/C:P/I:P/A:P,rhel-
|/freetype=new,rhel-6/freety |5/freetype=affected,rhel-6/
|pe=new,fedora-all/freetype= |freetype=affected,fedora-al
|new |l/freetype=affected,fedora-
| |all/mingw32-freetype=affect
| |ed
--- Comment #2 from Tomas Hoger <thoger at redhat.com> 2012-03-22 07:19:22 EDT ---
(In reply to comment #0)
> An out-of heap-based buffer write flaw was found in the way TrueType bytecode /
> opcode interpreter of the FreeType font rendering engine performed moving of
> zone2 pointer point by execution of 'SHift Contour' (SHC) instruction.
Bytecode interpreter (BCI) is where the problem surfaced, but it was addressed
in a TTF loading code that is not BCI specific. BCI support is disabled in Red
Hat Enterprise Linux freetype packages and is only enabled upstream by default
starting with version 2.4.
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