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ESB-2009.1453 - [Solaris][OpenSolaris] FreeType 2 Font Engine: Execute arbitrary code/commands - Remote with user interaction

Date: 28 October 2009
References: ESB-2009.0421  

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1453
Multiple Integer Overflow Vulnerabilities in the FreeType 2 Font Engine May
  Lead to a Denial of Service (DoS) or Allow Execution of Arbitrary Code
                              28 October 2009

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           FreeType 2 Font Engine
Publisher:         Sun Microsystems
Operating System:  Solaris
                   OpenSolaris
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2009-0946  

Reference:         ESB-2009.0421

Original Bulletin: 
   http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-270268-1

- --------------------------BEGIN INCLUDED TEXT--------------------

Multiple Integer Overflow Vulnerabilities in the FreeType 2 Font
Engine May Lead to a Denial of Service (DoS) or Allow Execution of
Arbitrary Code
  _________________________________________________________________

Category : Security
Release Phase : Preliminary
Bug Id : 6877323
Product : Solaris 8
Solaris 9
Solaris 10
OpenSolaris

Multiple Integer Overflow Vulnerabilities in the FreeType 2 Font Engine   ...


1. Impact

Multiple integer overflow vulnerabilities in the FreeType 2 Font
Library (libfreetype) may affect applications that make use of this library.
Depending on the application, this vulnerability may allow a local or remote
unprivileged user to crash the application through a specially crafted
font file, resulting in a Denial of service(DOS) or to execute arbitrary
code with the privileges of the user running that application.

These issues are also described in the following document CVE-2009-0946 at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0946

2. Contributing Factors

These issues can occur in the following releases:

SPARC Platform
  * X11 6.4.1 (for Solaris 8)
  * Solaris 9
  * Solaris 10
  * OpenSolaris based upon builds snv_01 through snv_123

x86 Platform
  * X11 6.4.1 (for Solaris 8)
  * Solaris 9
  * Solaris 10
  * OpenSolaris based upon builds snv_01 through snv_123

Note 1: To determine if FreeType 2 is installed on a system, the
following command can be run:

    $ pkginfo SUNWfreetype2
    system SUNWfreetype2 FreeType2 Font library

Note 2: To determine if an application is linked with the libfreetype
library, the ldd(1) utility can be utilized as in the following
example:

    $ ldd /usr/bin/gedit | grep libfreetype
    libfreetype.so.6 => /usr/sfw/lib/libfreetype.so.6

A comprehensive test to check if an application links with a library
such as libfreetype requires the use of pldd(1) against the running
application since ldd(1) does not list any shared objects explicitly
attached using dlopen(3C). For example:

    $ pldd <procces ID of application> | grep libfreetype
    /usr/sfw/lib/libfreetype.so.6

Note 3: OpenSolaris distributions may include additional bug fixes
above and beyond the build from which it was derived. To determine the
base build of OpenSolaris, the following command can be used:

    $ uname -v
    snv_120

3. Symptoms

If the described issues are exploited to cause a Denial of Service
(DoS) to an application which links to the libfreetype library, the
application will exit and may generate an error message about a Segmentation
Fault, potentially writing a core(4) file. There are no predictable symptoms
that would indicate the issue has been exploited to execute arbitrary
code with elevated privileges.

4. Workaround

There is no workaround for these issues. Please see the "Resolution"
section below.

5. Resolution

These issues are addressed in the following releases:

SPARC Platform
  * OpenSolaris based upon builds snv_124 or later

x86 Platform
  * OpenSolaris based upon builds snv_124 or later

A final resolution is pending completion for Solaris 8, 9 and 10.

This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
such an agreement, the Sun.com Terms of Use. This Sun Alert
notification may only be used for the purposes contemplated by these
agreements.

Copyright 2000-2009 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved

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This security bulletin is provided as a service to AusCERT's members.  As
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NOTE: This is only the original release of the security bulletin.  It may
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        http://www.auscert.org.au/render.html?cid=1980

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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