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

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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:


These issues are also described in the following documents:


2. Contributing Factors

CVE-2009-0844 and CVE-2009-0845 can occur only in the following releases:

SPARC Platform

• Solaris 10 without patch 140074-08
  
• OpenSolaris based upon builds snv_01 through snv_115

x86 Platform

• Solaris 10 without patch 140130-09
  
• OpenSolaris based upon builds snv_01 through snv_115

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) without patch 112237-17
  
• SEAM (Sun Enterprise Authentication Mechanism) 1.0.1 Supplemental (for Solaris 8) without patch 112390-15
  
• Solaris 9 without patch 112908-36
  
• Solaris 10 without patch 140074-08
• OpenSolaris based upon builds snv_01 through snv_115

x86 Platform

• SEAM (Sun Enterprise Authentication Mechanism) 1.0.1 (for Solaris 8) without patch 112238-16
  
• SEAM 1.0.1 (Sun Enterprise Authentication Mechanism) Supplemental (for Solaris 8) without patch 112240-14
  
• Solaris 9 without patch 115168-21
  
• Solaris 10 without patch 140130-09
• OpenSolaris based upon builds snv_01 through snv_115
  

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

• SEAM (Sun Enterprise Authentication Mechanism) 1.0.1 (for Solaris 8) with patch 112237-17 or later
  
• SEAM (Sun Enterprise Authentication Mechanism) 1.0.1 Supplemental (for Solaris 8) with patch 112390-15 or later
  
• Solaris 9 with patch 112908-36 or later
  
• Solaris 10 with patch 140074-08 or later
• OpenSolaris based upon builds snv_116 or later
  

x86 Platform

• SEAM (Sun Enterprise Authentication Mechanism) 1.0.1 (for Solaris 8) with patch 112238-16 or later
  
• SEAM 1.0.1 (Sun Enterprise Authentication Mechanism) Supplemental (for Solaris 8) with patch 112240-14 or later
  
• Solaris 9 with patch 115168-21 or later
  
• Solaris 10 with patch 140130-09 or later
• OpenSolaris based upon builds snv_116 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.

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Modification History

08-Apr-2009: Updated Workaround section for IDRs release
19-Jun-2009: Updated Contributing Factors and Resolution sections
01-Jul-2009: Updated Contributing Factors and Resolution sections
03-Aug-2009: Updated Contributing Factors and Resolution sections; Resolved

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