Uočena su i ispravljena dva sigurnosna propusta u programskom paketu FreeType. Napadači mogu navedene propuste iskoristiti za pokretanje proizvoljnog programskog koda i napad uskraćivanjem usluga (DoS napad).

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: freetype security update
Advisory ID:       RHSA-2012:0094-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-0094.html
Issue date:        2012-02-02
CVE Names:         CVE-2011-3256 CVE-2011-3439 
=====================================================================

1. Summary:

Updated freetype packages that fix multiple security issues are now
available for Red Hat Enterprise Linux 5.6 Extended Update Support.

The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS)
base scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux EUS (v. 5.6 server) - i386, ia64, ppc, s390x, x86_64

3. Description:

FreeType is a free, high-quality, portable font engine that can open and
manage font files. It also loads, hints, and renders individual glyphs
efficiently.

Multiple input validation flaws were found in the way FreeType processed
bitmap font files. If a specially-crafted font file was loaded by an
application linked against FreeType, it could cause the application to
crash or, potentially, execute arbitrary code with the privileges of the
user running the application. (CVE-2011-3256)

Multiple input validation flaws were found in the way FreeType processed
CID-keyed fonts. If a specially-crafted font file was loaded by an
application linked against FreeType, it could cause the application to
crash or, potentially, execute arbitrary code with the privileges of the
user running the application. (CVE-2011-3439)

Users are advised to upgrade to these updated packages, which contain
backported patches to correct these issues. The X server must be restarted
(log out, then log back in) for this update to take effect.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

746226 - CVE-2011-3256 FreeType FT_Bitmap_New integer overflow to buffer
overflow, FreeType TT_Vary_Get_Glyph_Deltas improper input validation
753799 - CVE-2011-3439 freetype: Multiple security flaws when loading CID-keyed
Type 1 fonts

6. Package List:

Red Hat Enterprise Linux EUS (v. 5.6 server):

Source:
freetype-2.2.1-28.el5_6.1.src.rpm

i386:
freetype-2.2.1-28.el5_6.1.i386.rpm
freetype-debuginfo-2.2.1-28.el5_6.1.i386.rpm
freetype-demos-2.2.1-28.el5_6.1.i386.rpm
freetype-devel-2.2.1-28.el5_6.1.i386.rpm

ia64:
freetype-2.2.1-28.el5_6.1.i386.rpm
freetype-2.2.1-28.el5_6.1.ia64.rpm
freetype-debuginfo-2.2.1-28.el5_6.1.i386.rpm
freetype-debuginfo-2.2.1-28.el5_6.1.ia64.rpm
freetype-demos-2.2.1-28.el5_6.1.ia64.rpm
freetype-devel-2.2.1-28.el5_6.1.ia64.rpm

ppc:
freetype-2.2.1-28.el5_6.1.ppc.rpm
freetype-2.2.1-28.el5_6.1.ppc64.rpm
freetype-debuginfo-2.2.1-28.el5_6.1.ppc.rpm
freetype-debuginfo-2.2.1-28.el5_6.1.ppc64.rpm
freetype-demos-2.2.1-28.el5_6.1.ppc.rpm
freetype-devel-2.2.1-28.el5_6.1.ppc.rpm
freetype-devel-2.2.1-28.el5_6.1.ppc64.rpm

s390x:
freetype-2.2.1-28.el5_6.1.s390.rpm
freetype-2.2.1-28.el5_6.1.s390x.rpm
freetype-debuginfo-2.2.1-28.el5_6.1.s390.rpm
freetype-debuginfo-2.2.1-28.el5_6.1.s390x.rpm
freetype-demos-2.2.1-28.el5_6.1.s390x.rpm
freetype-devel-2.2.1-28.el5_6.1.s390.rpm
freetype-devel-2.2.1-28.el5_6.1.s390x.rpm

x86_64:
freetype-2.2.1-28.el5_6.1.i386.rpm
freetype-2.2.1-28.el5_6.1.x86_64.rpm
freetype-debuginfo-2.2.1-28.el5_6.1.i386.rpm
freetype-debuginfo-2.2.1-28.el5_6.1.x86_64.rpm
freetype-demos-2.2.1-28.el5_6.1.x86_64.rpm
freetype-devel-2.2.1-28.el5_6.1.i386.rpm
freetype-devel-2.2.1-28.el5_6.1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2011-3256.html
https://www.redhat.com/security/data/cve/CVE-2011-3439.html
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2012 Red Hat, Inc.
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