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Liebe Kolleginnen und Kollegen,
soeben erreichte uns nachfolgendes RedHat Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.
CVE-2010-3054 – Schwachstelle in FreeType
Bei Gebrauch von verschachtetelten Zeichen aus den Standard Encoding
Accented Characters (aka seac) kann durch eine nicht naeher beschriebene
Schwachstelle mit Bezug zu psaux.h, cffgload.c, cffgload.h, und
t1decode.c ein Programmabbruch ausgeloest werden. Ein entfernter
Angreifer kann diese Schwachstelle zu einem Denial of Service ausnutzen.
CVE-2010-2806 – Schwachstelle in der FreeType Funktion t42_parse_sfnts()
In der Funktion t42_parse_sfnts() (aus: type42/t42parse.c) koennen durch
Benutzereingaben Indizes fehlerhaft gesetzt werden. Ein negativer Wert
fuer die Groesse bestimmter Zeichenketten in FontType42 Dateien kann
einen Buffer Overflow im Heapspeicher ausloesen. Ein entfernter
Angreifer kann diese Schwachstelle ausnutzen, um die Anwendung zum
Absturz (Denial-of-Service) oder schlimmstenfalls beliebige Befehle zur
Ausfuehrung zu bringen.
CVE-2010-3311 – Schwachstelle in FreeType beim Bearbeiten von
Font-Dateien
Beim Bearbeiten von Font-Dateien durch die X FreeType Library (libXft)
kann ein Fehler auftreten, der bewirkt, dass ausserhalb der Grenzen
eines Stream-Buffers gelesen wird. Ein entfernter Angreifer kann diese
Schwachstelle mittels einer speziell konstruierten Font-Datei fuer einen
Denial of Service Angriff oder eventuell zur Ausfuehrung beliebiger
Befehle ausnutzen. Betroffen sind alle Anwendungen, die gegen die
FreeType-Bibliothek gebunden wurden.
Betroffen sind die folgenden Software Pakete und Plattformen:
Paket freetype
Red Hat Desktop version 3 – i386, x86_64
Red Hat Enterprise Linux AS version 3 – i386, ia64, ppc, s390, s390x,
x86_64
Red Hat Enterprise Linux ES version 3 – i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 – i386, ia64, x86_64
Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.
(c) der deutschen Zusammenfassung bei DFN-CERT Services GmbH; die
Verbreitung, auch auszugsweise, ist nur unter Hinweis auf den Urheber,
DFN-CERT Services GmbH, und nur zu nicht kommerziellen Zwecken
gestattet.
Mit freundlichen Gruessen,
Jan Kohlrausch (CSIRT), Phone +49 40 808077-555
DFN-CERT Services GmbH, https://www.dfn-cert.de, Phone +49 40 808077-555
Sitz / Register: Hamburg, AG Hamburg, HRB 88805, Ust-IdNr.: DE 232129737
Sachsenstrasse 5, 20097 Hamburg/Germany, CEO: Dr. Klaus-Peter Kossakowski
CarmentiS – Early Warning Expertise
https://www.carmentis.org
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=====================================================================
Red Hat Security Advisory
Synopsis: Important: freetype security update
Advisory ID: RHSA-2010:0736-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0736.html
Issue date: 2010-10-04
CVE Names: CVE-2010-2806 CVE-2010-3054 CVE-2010-3311
=====================================================================
1. Summary:
Updated freetype packages that fix three security issues are now available
for Red Hat Enterprise Linux 3.
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 Desktop version 3 – i386, x86_64
Red Hat Enterprise Linux AS version 3 – i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux ES version 3 – i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 – i386, ia64, 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. The freetype packages for Red Hat Enterprise Linux 3 provide
both the FreeType 1 and FreeType 2 font engines.
It was discovered that the FreeType font rendering engine improperly
validated certain position values when processing input streams. If a user
loaded a specially-crafted font file with an application linked against
FreeType, and the relevant font glyphs were subsequently rendered with the
X FreeType library (libXft), it could trigger a heap-based buffer overflow
in the libXft library, causing the application to crash or, possibly,
execute arbitrary code with the privileges of the user running the
application. (CVE-2010-3311)
An array index error was found in the way the FreeType font rendering
engine processed certain PostScript Type 42 font files. If a user loaded a
specially-crafted font file with an application linked against FreeType, it
could cause the application to crash or, possibly, execute arbitrary code
with the privileges of the user running the application. (CVE-2010-2806)
A stack overflow flaw was found in the way the FreeType font rendering
engine processed PostScript Type 1 font files that contain nested Standard
Encoding Accented Character (seac) calls. If a user loaded a
specially-crafted font file with an application linked against FreeType, it
could cause the application to crash. (CVE-2010-3054)
Note: All of the issues in this erratum only affect the FreeType 2 font
engine.
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
http://kbase.redhat.com/faq/docs/DOC-11259
5. Bugs fixed (http://bugzilla.redhat.com/):
621980 – CVE-2010-2806 FreeType: Heap-based buffer overflow by processing FontType42 fonts with negative length of SFNT strings (FT bug #30656)
623625 – CVE-2010-3311 freetype: Input stream position error by processing Compact Font Format (CFF) font files
625632 – CVE-2010-3054 freetype: DoS via nested “seac” calls
6. Package List:
Red Hat Enterprise Linux AS version 3:
Source:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/freetype-2.1.4-18.el3.src.rpm
i386:
freetype-2.1.4-18.el3.i386.rpm
freetype-debuginfo-2.1.4-18.el3.i386.rpm
freetype-devel-2.1.4-18.el3.i386.rpm
ia64:
freetype-2.1.4-18.el3.i386.rpm
freetype-2.1.4-18.el3.ia64.rpm
freetype-debuginfo-2.1.4-18.el3.i386.rpm
freetype-debuginfo-2.1.4-18.el3.ia64.rpm
freetype-devel-2.1.4-18.el3.ia64.rpm
ppc:
freetype-2.1.4-18.el3.ppc.rpm
freetype-2.1.4-18.el3.ppc64.rpm
freetype-debuginfo-2.1.4-18.el3.ppc.rpm
freetype-debuginfo-2.1.4-18.el3.ppc64.rpm
freetype-devel-2.1.4-18.el3.ppc.rpm
s390:
freetype-2.1.4-18.el3.s390.rpm
freetype-debuginfo-2.1.4-18.el3.s390.rpm
freetype-devel-2.1.4-18.el3.s390.rpm
s390x:
freetype-2.1.4-18.el3.s390.rpm
freetype-2.1.4-18.el3.s390x.rpm
freetype-debuginfo-2.1.4-18.el3.s390.rpm
freetype-debuginfo-2.1.4-18.el3.s390x.rpm
freetype-devel-2.1.4-18.el3.s390x.rpm
x86_64:
freetype-2.1.4-18.el3.i386.rpm
freetype-2.1.4-18.el3.x86_64.rpm
freetype-debuginfo-2.1.4-18.el3.i386.rpm
freetype-debuginfo-2.1.4-18.el3.x86_64.rpm
freetype-devel-2.1.4-18.el3.x86_64.rpm
Red Hat Desktop version 3:
Source:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/freetype-2.1.4-18.el3.src.rpm
i386:
freetype-2.1.4-18.el3.i386.rpm
freetype-debuginfo-2.1.4-18.el3.i386.rpm
freetype-devel-2.1.4-18.el3.i386.rpm
x86_64:
freetype-2.1.4-18.el3.i386.rpm
freetype-2.1.4-18.el3.x86_64.rpm
freetype-debuginfo-2.1.4-18.el3.i386.rpm
freetype-debuginfo-2.1.4-18.el3.x86_64.rpm
freetype-devel-2.1.4-18.el3.x86_64.rpm
Red Hat Enterprise Linux ES version 3:
Source:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/freetype-2.1.4-18.el3.src.rpm
i386:
freetype-2.1.4-18.el3.i386.rpm
freetype-debuginfo-2.1.4-18.el3.i386.rpm
freetype-devel-2.1.4-18.el3.i386.rpm
ia64:
freetype-2.1.4-18.el3.i386.rpm
freetype-2.1.4-18.el3.ia64.rpm
freetype-debuginfo-2.1.4-18.el3.i386.rpm
freetype-debuginfo-2.1.4-18.el3.ia64.rpm
freetype-devel-2.1.4-18.el3.ia64.rpm
x86_64:
freetype-2.1.4-18.el3.i386.rpm
freetype-2.1.4-18.el3.x86_64.rpm
freetype-debuginfo-2.1.4-18.el3.i386.rpm
freetype-debuginfo-2.1.4-18.el3.x86_64.rpm
freetype-devel-2.1.4-18.el3.x86_64.rpm
Red Hat Enterprise Linux WS version 3:
Source:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/freetype-2.1.4-18.el3.src.rpm
i386:
freetype-2.1.4-18.el3.i386.rpm
freetype-debuginfo-2.1.4-18.el3.i386.rpm
freetype-devel-2.1.4-18.el3.i386.rpm
ia64:
freetype-2.1.4-18.el3.i386.rpm
freetype-2.1.4-18.el3.ia64.rpm
freetype-debuginfo-2.1.4-18.el3.i386.rpm
freetype-debuginfo-2.1.4-18.el3.ia64.rpm
freetype-devel-2.1.4-18.el3.ia64.rpm
x86_64:
freetype-2.1.4-18.el3.i386.rpm
freetype-2.1.4-18.el3.x86_64.rpm
freetype-debuginfo-2.1.4-18.el3.i386.rpm
freetype-debuginfo-2.1.4-18.el3.x86_64.rpm
freetype-devel-2.1.4-18.el3.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://www.redhat.com/security/team/key/#package
7. References:
https://www.redhat.com/security/data/cve/CVE-2010-2806.html
https://www.redhat.com/security/data/cve/CVE-2010-3054.html
https://www.redhat.com/security/data/cve/CVE-2010-3311.html
http://www.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2010 Red Hat, Inc.
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