[Bug 800584] CVE-2012-1128 freetype: NULL dereference in the SHZ instruction implementation in TTF BCI (#35601)

bugzilla at redhat.com bugzilla at redhat.com
Wed Mar 14 17:05:47 UTC 2012

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Tomas Hoger <thoger at redhat.com> changed:

           What    |Removed                     |Added
            Summary|CVE-2012-1128 freetype:     |CVE-2012-1128 freetype:
                   |NULL pointer dereference by |NULL dereference in the SHZ
                   |moving zone2 pointer point  |instruction implementation
                   |for certain TrueType font   |in TTF BCI (#35601)
                   |(FU#35601)                  |
  Status Whiteboard|impact=low,public=20120223, |impact=low,public=20120223,
                   |reported=20120302,source=go |reported=20120302,source=se
                   |ogle,cvss2=4.3/AV:N/AC:M/Au |calert,cvss2=4.3/AV:N/AC:M/
                   |:N/C:N/I:N/A:P,rhel-5/freet |Au:N/C:N/I:N/A:P,rhel-5/fre
                   |ype=notaffected,rhel-6/free |etype=notaffected,rhel-6/fr
                   |type=notaffected,fedora-all |eetype=notaffected,fedora-a
                   |/freetype=affected          |ll/freetype=affected

--- Comment #5 from Tomas Hoger <thoger at redhat.com> 2012-03-14 13:05:45 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


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

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