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Liebe Kolleginnen und Kollegen,
soeben erreichte uns nachfolgendes Sun Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.
Bitte beachten Sie, dass dies ein Update des Advisories ist, das die
folgenden Aenderungen betrifft:
Mit diesem Update stellt SUN einen Patch fuer Solaris 10 zur
Verfuegung
CVE-2006-6144 / VU#831452 – Double Free Fehler im MIT Kerberos GSS-API
“mechglue” Code
Code im “mechglue” Layer des GSS-API Code von MIT Kerberos versucht
unter bestimmten Umstaenden Speicher freizugeben, auf den nicht
initialisierte Zeiger verweisen. Angreifer koennen diese Schwachstelle
ueber das Netz dazu ausnutzen, beliebigen Code mit den Rechten der
Anwendung auszufuehren oder diese zum Absturz zu bringen. Die erstere
Moeglichkeit erscheint allerdings schwierig zu realisieren.
Unter Solaris befindet sich der entsprechende Code in der Bibliothek
libgss(3LIB). Anwendungen, welche diese Bibliothek verwenden, sind
evtl. fuer die entsprechende Schwachstelle anfaellig.
Betroffen sind die folgenden Software Pakete und Plattformen:
Generic Security Services library libgss(3LIB)
SPARC Platform
* Solaris 8 ohne Patch 109223-11
* Solaris 9 ohne Patch 112908-35
* Solaris 10 ohne Patch 141719-01
x86 Platform
* Solaris 8 ohne Patch 109224-11
* Solaris 9 ohne Patch 115168-20
* Solaris 10 ohne Patch 141719-01
Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.
Hersteller Advisory:
http://sunsolve.sun.com/search/document.do?assetkey=1-26-102772-1
http://sunsolve.sun.com/search/document.do?assetkey=1-66-201294-1
http://sunsolve.sun.com/search/document.do?assetkey=1-66-201294-1
http://sunsolve.sun.com/search/document.do?assetkey=1-66-201294-1
(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,
Detlev O. Matthies
– —
Detlev O. Matthies, M.Sc. (Incident Response Team)
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
Automatische Warnmeldungen https://www.cert.dfn.de/autowarn
Solution Type Sun Alert
Solution 201294 : Third-party Applications Using GSS-API May Be
Vulnerable to Compromise
Related Categories
* Home>Content>Sun Alert Criteria Categories>Security
* Home>Content>Sun Alert Release Phase>Resolved
Previously Published As
102772
Bug ID
6510866
Product
Solaris 9 Operating System
Solaris 10 Operating System
Solaris 8 Operating System
Date of Workaround Release
14-May-2009
Date of Resolved Release
05-Jun-2009
SA Document Body
Third-party Applications Using GSS-API May Be Vulnerable to Compromise
1. Impact
Third-party applications which utilize GSS-API and thus link to the
Generic Security Services library libgss(3LIB), may allow an
unauthenticated user (local or remote depending on the application) the
ability to execute arbitrary code with the privileges of the
application.
Note: Exploitation of this vulnerability is believed to be difficult.
No exploit code is known to exist at this time.
This issue is referenced in the following documents:
MITKRB5-SA-2006-003 – MIT krb5 Security Advisory 2006-003 at:
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2006-003-mechglue.
txt
CVE-2006-6144 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=2006-6144
CERT VU#831452 at http://www.kb.cert.org/vuls/id/831452
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 8 without patch 109223-11
* Solaris 9 without patch 112908-35
* Solaris 10 without patch 141719-01
x86 Platform
* Solaris 8 without patch 109224-11
* Solaris 9 without patch 115168-20
* Solaris 10 without patch 141720-01
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 affects applications which link against the Generic
Security Services library libgss(3LIB).
3. No applications shipped by Sun, including kadmind(1M), are affected
by this issue.
To determine if an application is linked against libgss(3LIB) the
following command can be run:
$ ldd application | grep libgss || echo “application not affected”
If output similar to the following is seen:
libgss.so.1 => /usr/lib/libgss.so.1
then the application links to libgss(3LIB) and may be affected by this
issue.
A comprehensive test to check if an application links with a library
such as libgss(3LIB) 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
/usr/lib/libgss.so.1
3. Symptoms
There are no reliable symptoms that would indicate this issue has been
exploited to execute arbitrary code with elevated privileges on a
system.
4. Workaround
There is no workaround for this issue. Please see the Resolution
section below.
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 8 with patch 109223-11 or later
* Solaris 9 with patch 112908-35 or later
* Solaris 10 with patch 141719-01 or later
x86 Platform
* Solaris 8 with patch 109224-11 or later
* Solaris 9 with patch 115168-20 or later
* Solaris 10 with patch 141720-01 or later
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
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.
Modification History
10-Jan-2007: Updated Impact statement and URL
14-May-2009: Updated Contributing Factors and Resolution sections
20-May-2009: Updated Contributing Factors and Resolution sections
05-Jun-2009: Updated Contributing Factors and Resolution sections; Resolved
Attachments
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