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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2009.0153 -- [Solaris] A Security Vulnerability in the Solaris Kerberos PAM Module May Allow Use of a User Specified Kerberos Configuration File, Leading to Escalation of Privileges 12 March 2009 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Kerberos PAM Module Publisher: Sun Microsystems Operating System: Solaris OpenSolaris Impact: Increased Privileges Denial of Service Access: Existing Account CVE Names: CVE-2009-0361 CVE-2009-0360 Ref: ESB-2009.0135 Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-252767-1 Revision History: March 12 2009: Workaround issued February 16 2009: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Solution Type: Sun Alert Solution 252767 : A Security Vulnerability in the Solaris Kerberos PAM Module May Allow Use of a User Specified Kerberos Configuration File, Leading to Escalation of Privileges Bug ID: 6799884 Product Sun Enterprise Authentication Mechanism 1.0.1 Solaris 9 Operating System Solaris 10 Operating System OpenSolaris Date of Preliminary Release: 12-Feb-2009 Date of Workaround Release: 10-Mar-2009 SA Document Body A Security Vulnerability in the Solaris Kerberos PAM Module May Allow Use of a User Specified Kerberos Configuration File, Leading to Escalation of Privileges 1. Impact A security vulnerability in the Solaris Kerberos (see kerberos(5)) pam_krb5(5) PAM module may allow a user supplied Kerberos configuration file to be used to specify realm and KDC server information, thereby allowing certain remote unprivileged users or applications to gain elevated privileges. Sun acknowledges with thanks, Russ Allbery and Steven Luo for bringing this issue to our attention. This issue is also described in the following documents: CVE-2009-0360 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0360 CVE-2009-0361 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0361 2. Contributing Factors This issue can occur in the following releases: SPARC Platform * SEAM (Sun Enterprise Authentication Mechanism) 1.0.1 (for Solaris 8) * Solaris 9 * Solaris 10 * Opensolaris based upon build snv_01 or later x86 Platform * SEAM (Sun Enterprise Authentication Mechanism) 1.0.1 (for Solaris 8) * Solaris 9 * Solaris 10 * Opensolaris based upon build snv_01 or later Note: 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 you system is using Kerberos, the following command can be run: $ svcs -a | grep security If none of the services are enabled, the system is not using Kerberos. 3. Symptoms There are no predictable symptoms to indicate this issue has been exploited to gain elevated privileges. 4. Workaround Interim Security Relief (ISR) is available from http://sunsolve.sun.com/tpatches for the following releases: SPARC Platform * Solaris 8 IDR141037-02 * Solaris 10 IDR140959-01 x86 Platform * Solaris 10 IDR141038-01 Note: This document refers to one or more Interim Security Relief (ISRs) which are designed to address the concerns identified herein. Sun has limited experience with these (ISRs) due to their interim nature. As such, you should only install the ISRs on systems meeting the configurations described above. Sun may release full patches at a later date, however, Sun is under no obligation whatsoever to create, release, or distribute any such patch. 5. Resolution A final resolution is pending completion. 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 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iD8DBQFJuFONNVH5XJJInbgRAhNqAJ4szevPrZS8TjQk8mcdWUXYasiDPgCfRjSJ 8LAfdrIjR0KBA/4i6ggFmbU= =VrrP -----END PGP SIGNATURE-----