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AUSCERT External Security Bulletin Redistribution
ESB-2009.0341 -- [Solaris][OpenSolaris]
Kerberos 'Mech' Libraries: Multiple Vulnerabilities
22 June 2009
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AusCERT Security Bulletin Summary
---------------------------------
Product: Kerberos 'Mech' Libraries
Publisher: Sun Microsystems
Operating System: Solaris
OpenSolaris
Sun Enterprise Authentication Mechanism 1.0.1
Impact: Root Compromise
Access Privileged Data
Denial of Service
Access: Remote/Unauthenticated
CVE Names: CVE-2009-0847 CVE-2009-0846 CVE-2009-0845
CVE-2009-0844
Ref: ESB-2009.0304
ESB-2009.0330
ESB-2009.0331
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-256728-1
Revision History: June 22 2009: Updated resolution
April 9 2009: Initial Release
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Solution Type: Sun Alert
Solution 256728 : Multiple Security Vulnerabilities in the Solaris
Kerberos 'Mech' Libraries May Lead To Execution of Arbitrary Code,
Unauthorized Access to Data or a Denial of Service (DoS) Condition
Bug ID: 6822062, 6822066
Product
Sun Enterprise Authentication Mechanism 1.0.1
Solaris 9 Operating System
Solaris 10 Operating System
OpenSolaris
Date of Workaround Release: 07-Apr-2009
SA Document Body
Multiple Security Vulnerabilities in the Solaris Kerberos 'Mech' Libraries
May Lead To Execution of Arbitrary Code, Unauthorized Access to Data or a
Denial of Service (DoS) Condition
1. Impact
Multiple security vulnerabilities in the Solaris Kerberos (see
kerberos(5)) mech_krb5 library and the mech_spnego(5) library may
allow remote unprivileged users to cause certain Kerberos applications
and daemons, including the Kerberos administration daemon
(kadmind(1M)) to crash. These issues may also lead to unauthorized
information disclosure and execution of arbitrary code with the
privileges of the root user.
These issues are also described in the following documents:
CVE-2009-0844 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0844
CVE-2009-0845 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0845
CVE-2009-0846 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0846
CVE-2009-0847 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0847
These issues are also described in the following documents:
MIT Advisory MITKRB5-SA-2009-002 at
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2009-002.txt
MIT Advisory MITKRB5-SA-2009-001 at
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2009-001.txt
2. Contributing Factors
CVE-2009-0844 and CVE-2009-0845 can occur only in the following
releases:
SPARC Platform
* Solaris 10
* OpenSolaris based upon builds snv_01 (or later)
x86 Platform
* Solaris 10
* OpenSolaris based upon builds snv_01 (or later)
CVE-2009-0846 and CVE-2009-0847 can occur in the following releases:
SPARC Platform
* SEAM (Sun Enterprise Authentication Mechanism) 1.0.1 (for Solaris
8)
* SEAM (Sun Enterprise Authentication Mechanism) 1.0.1 Supplemental
(for Solaris 8)
* Solaris 9
* Solaris 10
* OpenSolaris based upon builds snv_01 (or later)
x86 Platform
* SEAM (Sun Enterprise Authentication Mechanism) 1.0.1 (for Solaris
8)
* SEAM 1.0.1 (Sun Enterprise Authentication Mechanism) Supplemental
(for Solaris 8)
* Solaris 9
* Solaris 10
* OpenSolaris based upon builds snv_01 (or later)
OpenSolaris distributions may include additional bug fixes above and
beyond the build from which it was derived. The base build can be
derived as follows:
$ uname -v
snv_101
Note: This issue could affect all systems utilizing Kerberos. To
determine if a system is configured to use Kerberos, the following
command may be run:
% grep default_realm /etc/krb5/krb5.conf
If the output of the above command is as follows:
default_realm = ___default_realm___
then the system is not configured to use Kereberos.
3. Symptoms
There are no predictable symptoms to indicate these issue have been
exploited.
4. Workaround
Until patches can be applied, these issues may be worked around by
disabling Kerberos on the affected systems by moving the
/etc/krb5/krb5.conf file, for example:
# mv /etc/krb5/krb5.conf /etc/krb5/krb5.conf.SAVE
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 10 with patch 140074-08 or later
* OpenSolaris based upon builds snv_116 or later
x86 Platform
* Solaris 10 with patch 140130-09 or later
* OpenSolaris based upon builds snv_116 or later
A final resolution is pending completion for Solaris 9 and SEAM.
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
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