Note: This is an archival copy of Security Sun Alert 249926 as previously published on http://sunsolve.sun.com.
Latest version of this security advisory is available from http://support.oracle.com as Sun Alert 1019965.1.
Article ID : 1019965.1
Article Type : Sun Alerts (SURE)
Last reviewed : 2009-03-15
Audience : PUBLIC
Copyright Notice: Copyright © 2010, Oracle Corporation and/or its affiliates.

A Security Vulnerability in Kerberos Incremental Propagation May Lead to a Denial of Service (DoS) Against Slave KDC Systems



Category
Security

Release Phase
Resolved

Bug Id
6746597

Product
Solaris 10 Operating System
OpenSolaris

Date of Resolved Release
16-Mar-2009

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 1009886.1.

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.

References

138371-05
138372-05





Attachments
This solution has no attachment