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AUSCERT External Security Bulletin Redistribution
ESB-2008.1121 -- [Solaris]
A Security Vulnerability in the Management of Solaris Kerberos (see
kerberos(5)) may Lead to a User Denial of Service (DoS) Attack
30 December 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: kerberos
Publisher: Sun Microsystems
Operating System: Solaris
Impact: Denial of Service
Access: Remote/Unauthenticated
CVE Names: CVE-2008-5690
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-244866-1
Revision History: December 30 2008: Added CVE Reference
December 15 2008: Initial Release
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Solution Type: Sun Alert
Solution 244866 : A Security Vulnerability in the Management of
Solaris Kerberos (see kerberos(5)) may Lead to a User Denial of
Service (DoS) Attack
Bug ID: 6691206
Product
Solaris 8 Operating System
Solaris 9 Operating System
Solaris 10 Operating System
OpenSolaris
Date of Resolved Release: 11-Dec-2008
SA Document Body
A security vulnerability in the management of Solaris Kerberos (see
kerberos(5)) credential renewal:
1. Impact
A security vulnerability in the management of Solaris Kerberos (see
kerberos(5)) credential renewal may allow a local unprivileged user to
prevent other users from authenticating to the Kerberos server. This
is a type of Denial of Service (DoS).
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 8 without patch 109805-19
* Solaris 9 without patch 112908-33
* Solaris 10 without patch 139478-01
* Opensolaris based upon build snv_01 through snv_104
x86 Platform
* Solaris 8 without patch 109806-19
* Solaris 9 without patch 115168-18
* Solaris 10 without patch 139479-01
* Opensolaris based upon build snv_01 through snv_104
Note 1: This issue could affect all kerberized users. To determine if
your system is configured for Kerberos, run the following command:
% grep default_realm /etc/krb5/krb5.conf
If the above command returns the following data, then your system is
NOT configured for Kerberos:
# default_realm = ___default_realm___
# ___default_realm___ = {
# ___domainname___ = ___default_realm___
Note 2: 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
This issue exists on all systems utilizing Kerberos. If the described
issue occurs, the following error message will be seen:
Credentials cache file permissions incorrect when initializing cache
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 109805-19 or later
* Solaris 9 with patch 112908-33 or later
* Solaris 10 with patch 139478-01 or later
* Opensolaris based upon build snv_105 or later
x86 Platform
* Solaris 8 without patch 109806-19 or later
* Solaris 9 without patch 115168-18 or later
* Solaris 10 without patch 139479-01 or later
* Opensolaris based upon build snv_105 or later
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 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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