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Liebe Kolleginnen und Kollegen,

soeben erreichte uns nachfolgendes Sun Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.

CVE-2009-2347 – Integer Overflows in der Bibliothek libTIFF

In der Bibliothek libTIFF werden in zwei Funktionen die Breite und
Hoehe eines TIFF-Bildes nicht ausreichend ueberprueft und dadurch
koennen Integer Overflows ausgeloest werden. Die betroffenen
Funktionen cvt_whole_image() und tiffcvt() werden von den Programmen
tiff2rgba bzw. rgb2ycbcr verwendet. Ein Angreifer kann diese
Schwachstelle ausnutzen, indem er einen Benutzer dazu bringt ein
entsprechend aufgebautes TIFF-Bild mit einem der betroffenen Programme
zu oeffnen, um beliebige Befehle mit den Rechten des Benutzers
ausfuehren.

Betroffen sind die folgenden Software Pakete und Plattformen:

Solaris 8
Solaris 9
Solaris 10
OpenSolaris

SPARC Plattform
* GNOME 2.0 (fuer Solaris 8)
* Solaris 9
* Solaris 10
* OpenSolaris basierend auf den Builds snv_01 bis snv_121

x86 Plattform
* GNOME 2.0 (fuer Solaris 8)
* Solaris 9
* Solaris 10
* OpenSolaris basierend auf den Builds snv_01 bis snv_121

Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

Hersteller Advisory:
http://sunsolve.sun.com/search/document.do?assetkey=1-66-265808-1

(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,
Klaus Moeller, DFN-CERT

– —
Dipl. Inform. Klaus Moeller (Incident Response Team)
Phone: +49 40 808077-555, Fax: +49 40 808077-556

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
Sachsenstrase 5, 20097 Hamburg/Germany, CEO: Dr. Klaus-Peter Kossakowski

Solution Type Sun Alert
Solution 265808 : Multiple Integer Overflow Vulnerabilities in the
libtiff(3) Image Conversion Tools tiff2rgba and rgb2ycbcr May Lead to
Arbitrary Code Execution
Related Categories

* Home>Content>Sun Alert Criteria Categories>Security
* Home>Content>Sun Alert Release Phase>Workaround

Bug ID
6858149

Product
Solaris 8 Operating System
Solaris 9 Operating System
Solaris 10 Operating System
OpenSolaris

Date of Workaround Release
14-Aug-2009

SA Document Body
Multiple Integer Overflow Vulnerabilities in the libtiff(3) Image Conversion To
ols tiff2rgba and rgb2ycbcr May Lead to Arbitrary Code Execution

1. Impact
Multiple integer overflow vulnerabilities in the libtiff(3) image
conversion tools tiff2rgba and rgb2ycbcr may allow a local or remote
unprivileged user to execute arbitrary code via a TIFF image with large
width and height values.
This issue is also described in the following document:
CVE-2009-2347 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2347
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* GNOME 2.0 (for Solaris 8)
* Solaris 9
* Solaris 10
* OpenSolaris based upon builds snv_01 through snv_121

x86 Platform
* GNOME 2.0 (for Solaris 8)
* Solaris 9
* Solaris 10
* OpenSolaris based upon builds snv_01 through snv_121

Notes:
1. Solaris 8 entered EOSL Phase 2 on 1 April 2009. Entitlement to
patches developed on or after 1 April 2009 requires the purchase of the
Solaris 8 Vintage Patch Service. See Note in section 5 for more
details.
2. This issue only affect systems which have the libtiff(3) conversion
utilities tiff2rgba and rgb2ycbcr installed. These utilities are part
of the SUNWTiff package. To check whether the SUNWTiff package is
installed on Solaris 8, 9, and 10 the pkginfo(1) command can be used as
in the following example:
$ pkginfo -q SUNWTiff && echo “SUNWTiff is installed”

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_86

3. Symptoms
There are no predictable symptoms that would indicate the described
issue has been exploited to execute arbitrary code.
4. Workaround
To work around the described issue, do not load TIFF images from
untrusted sources.
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* OpenSolaris based upon builds snv_122 or later

x86 Platform
* OpenSolaris based upon builds snv_122 or later

A final resolution is pending completion for Solaris 8, 9, and 10.
Note: The READMEs of Solaris 8 patches developed on or after 1 April
2009 are available to all customers however Solaris 8 entered EOSL
Phase 2 on April 1, 2009 and thus entitlement for these patches,
including those that fix security vulnerabilities, requires the
purchase of the Solaris 8 Vintage Patch Service. More information about
the Solaris 8 Vintage Patch Service is available at:
http://www.sun.com/service/eosl/Solaris8.html
For more information on Security Sun Alerts, see Technical Instruction
ID 213557.
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
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notification may only be used for the purposes contemplated by these
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Clara, CA 95054 U.S.A. All rights reserved.
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