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.

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References

138371-05
138372-05





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