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AUSCERT External Security Bulletin Redistribution
ESB-2009.0250 -- [Solaris]
A Security Vulnerability in Kerberos Incremental Propagation May Lead to a
Denial of Service (DoS) Against Slave KDC Systems
18 March 2009
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AusCERT Security Bulletin Summary
---------------------------------
Product: Kerberos
Publisher: Sun Microsystems
Operating System: Solaris
OpenSolaris
Impact: Denial of Service
Access: Remote/Unauthenticated
CVE Names: CVE-2009-0923
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-249926-1
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Solution Type: Sun Alert
Solution 249926 : A Security Vulnerability in Kerberos Incremental
Propagation May Lead to a Denial of Service (DoS) Against Slave KDC Systems
Bug ID: 6746597
Product
Solaris 10 Operating System
OpenSolaris
Date of Resolved Release: 16-Mar-2009
SA Document Body
A Security Vulnerability in Kerberos Incremental Propagation May Lead to a
Denial of Service (DoS) Against Slave KDC Systems
1. Impact
A security vulnerability in Solaris Kerberos (see kerberos(5)) may
allow an unauthenticated remote user on a system which can access a
master Key Distribution Center (KDC) server to prevent propagation of
incremental propagation requests to slave KDC servers. This is a type
of Denial of Service (DoS).
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 10 without patch 138371-05
* Opensolaris based upon builds snv_01 through snv_110
x86 Platform
* Solaris 10 without patch 138372-05
* Opensolaris based upon builds snv_01 through snv_110
Note: This issue can affect any slave KDC system. To determine if a
system is configured as a slave KDC, the following command can be run:
% svcs -a | grep krb5_prop
If the output from this command states that the service is online,
then the system is configured as a slave KDC.
3. Symptoms
This issue exists on any system acting as a slave KDC. It may be
noticed that propagation is not occuring to the slave system by
reviewing /var/krb5/kdc.log on the master for the lack of incremental
propagation messages.
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 10 with patch 138371-05 or later
* Opensolaris based upon build snv_111 or later
x86 Platform
* Solaris 10 with patch 138372-05 or later
* Opensolaris based upon build snv_111 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 2000-2009 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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