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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.0603 Arbitary file overwrite symlink in libodm 22 June 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libodm Publisher: IBM Operating System: AIX Impact/Access: Increased Privileges -- Existing Account Overwrite Arbitrary Files -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2012-2179 Original Bulletin: http://aix.software.ibm.com/aix/efixes/security/libodm_advisory.asc - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 IBM SECURITY ADVISORY First Issued: Thu Jun 14 16:00:02 CDT 2012 The most recent version of this document is available here: http://aix.software.ibm.com/aix/efixes/security/libodm_advisory.asc =============================================================================== VULNERABILITY SUMMARY VULNERABILITY: Arbitary file overwrite symlink in libodm PLATFORMS: AIX 5.3, 6.1, and 7.1 releases SOLUTION: Apply the fix as described below THREAT: A local attacker could gain lateral or elevated privileges CVE Number: CVE-2012-2179 Reboot required? NO Workarounds? NO Protected by FPM? NO Protected by SED? NO =============================================================================== DETAILED INFORMATION I. DESCRIPTION AIX could allow a arbitrary file overwrite symlink vulnerability due to libodm.a bug. II. CVSS CVSS Base Score: 6.9 CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/75510 for the current score CVSS Environmental Score*: Undefined CVSS String: (AV:L/AC:M/Au:N/C:C/I:C/A:C) III. PLATFORM VULNERABILITY ASSESSMENT Note: To use the following commands on VIOS you must first execute: oem_setup_env To determine if your system is vulnerable, execute the following command: lslpp -L bos.rte.odm The following fileset levels are vulnerable: AIX Fileset Lower Level Upper Level ------------------------------------------------ bos.rte.odm 5.3.8.0 5.3.8.0 bos.rte.odm 6.1.6.0 6.1.6.15 bos.rte.odm 6.1.6.0 6.1.6.15 bos.rte.odm 7.1.0.0 7.1.0.15 bos.rte.odm 7.1.1.0 7.1.1.15 IV. SOLUTIONS A. APARS IBM has assigned the following APARs to this problem: AIX Level APAR number Availability --------------------------------------------------- 5.3.12 IV22019 1/04/13 sp7 6.1.6 IV21379 12/12/12 sp10 6.1.7 IV21381 7/18/12 sp5 7.1.0 IV21382 12/12/12 sp8 7.1.1 IV21383 7/18/12 sp5 Subscribe to the APARs here: http://www.ibm.com/support/docview.wss?uid=isg1IV22019 http://www.ibm.com/support/docview.wss?uid=isg1IV21379 http://www.ibm.com/support/docview.wss?uid=isg1IV21381 http://www.ibm.com/support/docview.wss?uid=isg1IV21382 http://www.ibm.com/support/docview.wss?uid=isg1IV21383 By subscribing, you will receive periodic email alerting you to the status of the APAR, and a link to download the fix once it becomes available. B. FIXES Fixes are available. The fixes can be downloaded via ftp from: ftp://aix.software.ibm.com/aix/efixes/security/libodm_fix.tar The link above is to a tar file containing this signed advisory, fix packages, and PGP signatures for each package. The fixes below include prerequisite checking. This will enforce the correct mapping between the fixes and AIX Technology Levels. AIX Level Interim Fix (*.Z) ------------------------------------------------------------------- 5.3.12.5 IV22019.120604.epkg.Z 6.1.6.7 IV21379.120613.epkg.Z 6.1.7.4 IV21381.120613.epkg.Z 7.1.0.5 IV21382.120613.epkg.Z 7.1.1.4 IV21383.120613.epkg.Z VIOS Level Interim Fix (*.Z) ------------------------------------------------------------------- 2.2.1.4-FP-25 SP-02 VIOS.120619.epkg.Z To extract the fixes from the tar file: tar xvf libodm_fix.tar cd libodm_fix Verify you have retrieved the fixes intact: The checksums below were generated using the "csum -h SHA1" (sha1sum) command is the followng: csum -h SHA1 (sha1sum) filename ------------------------------------------------------------------ 70edcac02c9891e6029d5a88e8c1891a3f354526 IV21379.120613.epkg.Z 9e11b93c90a4bb355025b0083a8b79fdd6cf9681 IV21381.120613.epkg.Z 5452adf1f5933f4f0af98a05ad90c41443134111 IV21382.120613.epkg.Z 5891961e0ea9826f31a6824525fa8c998d539682 IV21383.120613.epkg.Z a292565751434a40508131f6371a07060566e494 IV22019.120604.epkg.Z 65b4ccf11a71ee5dcf4d97f7d554d31401ad76b7 VIOS.120619.epkg.Z To verify the sum, use the text of this advisory as input to sha1sum. For example: csum -h SHA1 -i Advisory.asc sha1sum -c Advisory.asc These sums should match exactly. The PGP signatures in the tar file and on this advisory can also be used to verify the integrity of the fixes. If the sums or signatures cannot be confirmed, contact IBM AIX Security at security-alert@austin.ibm.com and describe the discrepancy. C. FIX AND INTERIM FIX INSTALLATION IMPORTANT: If possible, it is recommended that a mksysb backup of the system be created. Verify it is both bootable and readable before proceeding. To preview a fix installation: installp -a -d fix_name -p all # where fix_name is the name of the # fix package being previewed. To install a fix package: installp -a -d fix_name -X all # where fix_name is the name of the # fix package being installed. Interim fixes have had limited functional and regression testing but not the full regression testing that takes place for Service Packs; thus, IBM does not warrant the fully correct functionality of an interim fix. Interim fix management documentation can be found at: http://www14.software.ibm.com/webapp/set2/sas/f/aix.efixmgmt/home.html To preview an interim fix installation: emgr -e ipkg_name -p # where ipkg_name is the name of the # interim fix package being previewed. To install an interim fix package: emgr -e ipkg_name -X # where ipkg_name is the name of the # interim fix package being installed. V. WORKAROUNDS None VI. OBTAINING FIXES AIX security fixes can be downloaded from: ftp://aix.software.ibm.com/aix/efixes/security AIX fixes can be downloaded from: http://www.ibm.com/eserver/support/fixes/fixcentral/main/pseries/aix NOTE: Affected customers are urged to upgrade to the latest applicable Technology Level and Service Pack. VII. CONTACT INFORMATION If you would like to receive AIX Security Advisories via email, please visit: http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd Comments regarding the content of this announcement can be directed to: security-alert@austin.ibm.com To request the PGP public key that can be used to communicate securely with the AIX Security Team you can either: A. Send an email with "get key" in the subject line to: security-alert@austin.ibm.com B. Download the key from a PGP Public Key Server. The key ID is: 0x28BFAA12 Please contact your local IBM AIX support center for any assistance. eServer is a trademark of International Business Machines Corporation. IBM, AIX and pSeries are registered trademarks of International Business Machines Corporation. All other trademarks are property of their respective holders. VIII. ACKNOWLEDGMENTS This vulnerability was reported by Jakub Wartak. IX. REFERENCES: Complete CVSS Guide: http://www.first.org/cvss/cvss-guide.html On-line Calculator V2: http://nvd.nist.gov/cvss.cfm?calculator&adv&version=2 X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/75510 CVE-2012-2179: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2179 *The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Flash. Note: According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (AIX) iD8DBQFP4i5j4fmd+Ci/qhIRAufmAJ9qpRYq18JVn2iqOTZ5Bg77Vec4YwCfYF+d B3InsoIOsVuLe6r2DGjijns= =TlSn - -----END PGP SIGNATURE----- - --------------------------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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