===================================================================== CERT-Renater Note d'Information No. 2009/VULN249 _____________________________________________________________________ DATE : 22/06/2009 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Solaris verions 9, 10 running Solaris Kerberos mech_krb5 library, Solaris Kerberos mech_spnego library, Sun Enterprise Authentication Mechanism 1.0.1. ====================================================================== http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-256728-1 ______________________________________________________________________ Solution Type: Sun Alert Solution 256728 : 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 Bug ID: 6822062, 6822066 Product Sun Enterprise Authentication Mechanism 1.0.1 Solaris 9 Operating System Solaris 10 Operating System OpenSolaris Date of Workaround Release: 07-Apr-2009 SA Document Body 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: CVE-2009-0844 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0844 CVE-2009-0845 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0845 CVE-2009-0846 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0846 CVE-2009-0847 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0847 These issues are also described in the following documents: MIT Advisory MITKRB5-SA-2009-002 at http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2009-002.txt MIT Advisory MITKRB5-SA-2009-001 at http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2009-001.txt 2. Contributing Factors CVE-2009-0844 and CVE-2009-0845 can occur only in the following releases: SPARC Platform * Solaris 10 * OpenSolaris based upon builds snv_01 (or later) x86 Platform * Solaris 10 * OpenSolaris based upon builds snv_01 (or later) 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) * SEAM (Sun Enterprise Authentication Mechanism) 1.0.1 Supplemental (for Solaris 8) * Solaris 9 * Solaris 10 * OpenSolaris based upon builds snv_01 (or later) x86 Platform * SEAM (Sun Enterprise Authentication Mechanism) 1.0.1 (for Solaris 8) * SEAM 1.0.1 (Sun Enterprise Authentication Mechanism) Supplemental (for Solaris 8) * Solaris 9 * Solaris 10 * OpenSolaris based upon builds snv_01 (or later) 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 * Solaris 10 with patch 140074-08 or later * OpenSolaris based upon builds snv_116 or later x86 Platform * Solaris 10 with patch 140130-09 or later * OpenSolaris based upon builds snv_116 or later A final resolution is pending completion for Solaris 9 and SEAM. 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 ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================