(Red Hat Issues Fix) FreeType2 Memory Corruption Error in Parsing PFB Font Files Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID: 1020342|
SecurityTracker URL: http://securitytracker.com/id/1020342
(Links to External Site)
Date: Jun 20 2008
Execution of arbitrary code via network, User access via network|
Fix Available: Yes Vendor Confirmed: Yes |
Version(s): 2.3.5 and prior versions|
A vulnerability was reported in FreeType2. A remote user can cause arbitrary code to be executed on the target user's system.|
A remote user can create a specially crafted Printer Font Binary (PFB) format font file that, when loaded by the target user or application, will trigger a memory corruption error and execute arbitrary code on the target system. The code will run with the privileges of the target user or application.
A specially crafted 'number of axes' in a PFB file can trigger code execution.
The vendor was notified on June 3, 2008.
regenrecht reported this vulnerability via iDefense.
A remote user can create a file that, when loaded by the target user or application, will execute arbitrary code on the target system.|
Red Hat has released a fix.|
The Red Hat advisory is available at:
Vendor URL: www.freetype.org/ (Links to External Site)
Access control error|
|Underlying OS: Linux (Red Hat Enterprise)|
|Underlying OS Comments: 2.1|
This archive entry is a follow-up to the message listed below.|
Source Message Contents
Subject: [RHSA-2008:0558-01] Important: freetype security update|
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Red Hat Security Advisory
Synopsis: Important: freetype security update
Advisory ID: RHSA-2008:0558-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2008-0558.html
Issue date: 2008-06-20
CVE Names: CVE-2008-1806 CVE-2008-1807 CVE-2008-1808
Updated freetype packages that fix various security issues are now
available for Red Hat Enterprise Linux 2.1.
This update has been rated as having important security impact by the Red
Hat Security Response Team.
2. Relevant releases/architectures:
Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386
FreeType is a free, high-quality, portable font engine that can open and
manage font files, as well as efficiently load, hint and render individual
Multiple flaws were discovered in FreeType's Printer Font Binary (PFB) and
TrueType Font (TTF) font-file format parsers. If a user loaded a carefully
crafted font-file with a program linked against FreeType, it could cause
the application to crash, or possibly execute arbitrary code.
(CVE-2008-1806, CVE-2008-1807, CVE-2008-1808)
Note: the flaw in FreeType's TrueType Font (TTF) font-file format parser,
covered by CVE-2008-1808, only affected the FreeType 1 library (libttf),
shipped in the freetype packages in Red Hat Enterprise Linux 2.1. The
FreeType 2 library (libfreetype) is not affected, as it is not compiled
with TTF Byte Code Interpreter (BCI) support.
Users of freetype should upgrade to these updated packages, which contain
backported patches to resolve these issues.
Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.
This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
5. Bugs fixed (http://bugzilla.redhat.com/):
450768 - CVE-2008-1806 FreeType PFB integer overflow
450773 - CVE-2008-1807 FreeType invalid free() flaw
450774 - CVE-2008-1808 FreeType off-by-one flaws
6. Package List:
Red Hat Enterprise Linux AS (Advanced Server) version 2.1 :
Red Hat Linux Advanced Workstation 2.1:
Red Hat Enterprise Linux ES version 2.1:
Red Hat Enterprise Linux WS version 2.1:
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2008 Red Hat, Inc.
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