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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.1023.2 Vulnerability in AIX bind 29 January 2013 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: bind Publisher: IBM Operating System: AIX Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2012-5166 Reference: ESB-2012.0974 Original Bulletin: http://aix.software.ibm.com/aix/efixes/security/bind9_advisory5.asc Revision History: January 29 2013: New ifixes for the latest SP's October 24 2012: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 IBM SECURITY ADVISORY First Issued: Tue Oct 23 10:13:27 CDT 2012 | Updated: Mon Jan 28 12:29:56 CDT 2013 | Update: New ifixes for the latest SP's http://aix.software.ibm.com/aix/efixes/security/bind9_advisory5.asc =============================================================================== VULNERABILITY SUMMARY VULNERABILITY: Vulnerability in AIX bind PLATFORMS: AIX 5.3 Service Extension, 6.1, and 7.1 releases SOLUTION: Apply the fix as described below THREAT: A remote attacker can cause denial of service CVE Number: CVE-2012-5166 Reboot required? NO Workarounds? YES Protected by FPM? NO Protected by SED? NO =============================================================================== DETAILED INFORMATION I. DESCRIPTION (from cve.mitre.org) If specific combinations of RDATA are loaded into a nameserver, either via cache or an authoritative zone, a subsequent query for a related record will cause named to lock up. Please see the following for more information: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-5166 II. CVSS CVSS Base Score: 7.8 CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/79121 for the current score CVSS Environmental Score*: Undefined CVSS String: (AV:N/AC:L/Au:N/C:N/I:N/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.net.tcp.client bos.net.tcp.server The following fileset levels are vulnerable: AIX Fileset Lower Level Upper Level ------------------------------------------------ bos.net.tcp.client 5.3.12.0 5.3.12.7 bos.net.tcp.server 5.3.12.0 5.3.12.4 | bos.net.tcp.client 6.1.6.0 6.1.6.21 | bos.net.tcp.server 6.1.6.0 6.1.6.20 | bos.net.tcp.client 6.1.7.0 6.1.7.17 | bos.net.tcp.server 6.1.7.0 6.1.7.17 | bos.net.tcp.client 7.1.0.0 7.1.0.22 bos.net.tcp.server 7.1.0.0 7.1.0.19 | bos.net.tcp.client 7.1.1.0 7.1.1.17 | bos.net.tcp.server 7.1.1.0 7.1.1.17 IV. SOLUTIONS A. APARS IBM has assigned the following APARs to this problem: AIX Level APAR number Availability --------------------------------------------------- 5.3.12 IV30368 Available as of sp7 | 6.1.6 IV30364 03/29/13 sp11 | 6.1.7 IV30365 03/29/13 sp7 | 6.1.8 IV30247 Available as of sp1 | 7.1.0 IV30366 05/02/13 sp9 | 7.1.1 IV30367 05/02/13 sp7 | 7.1.2 IV30185 Available as of sp1 Subscribe to the APARs here: http://www.ibm.com/support/docview.wss?uid=isg1IV30368 http://www.ibm.com/support/docview.wss?uid=isg1IV30364 http://www.ibm.com/support/docview.wss?uid=isg1IV30365 | http://www.ibm.com/support/docview.wss?uid=isg1IV30247 http://www.ibm.com/support/docview.wss?uid=isg1IV30366 http://www.ibm.com/support/docview.wss?uid=isg1IV30367 | http://www.ibm.com/support/docview.wss?uid=isg1IV30185 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/bind9_fix5.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) ------------------------------------------------------------------- 5.3.12.6 IV30368s06.121016.epkg.Z 6.1.6.9 IV30364s09.121016.epkg.Z | 6.1.6.10 IV30364s10.130121.epkg.Z 6.1.7.5 IV30365s05.121016.epkg.Z | 6.1.7.6 IV30365s06.130121.epkg.Z 7.1.0.7 IV30366s07.121016.epkg.Z | 7.1.0.8 IV30366s08.130121.epkg.Z 7.1.1.5 IV30367s05.121016.epkg.Z | 7.1.1.6 IV30367s06.130121.epkg.Z VIOS Level Interim Fix (*.Z) ------------------------------------------------------------------- 2.2.1.4-FP-25 SP-02 IV30365s04.121018.epkg.Z To extract the fixes from the tar file: tar xvf bind9_fix5.tar cd bind9_fix5 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 ------------------------------------------------------------------ 76c1615c13fb9e8ce77c1e2cc3cdfc7f4e3f2ce9 IV30368s06.121016.epkg.Z 69095160bf88dd4a764333bc31c26de5bf980c82 IV30364s09.121016.epkg.Z | bf817930a0a569cb984496ca1d62e49b2ff24e6e IV30364s10.130121.epkg.Z 1a03d512c5f6f53813c7d679681327dbaf991fbf IV30365s05.121016.epkg.Z | 5c137843e8d31ecb9cbbb8bc8ff3390f16eb6ea0 IV30365s06.130121.epkg.Z 0dcac920553a9bd0e34484519ab3a6e4f80fdf83 IV30366s07.121016.epkg.Z | de70daa2f7692cae7d59f8cfec542e0b87cf0f0b IV30366s08.130121.epkg.Z b3ae50663c8866bbc1c0cead2871347c86afc52e IV30367s05.121016.epkg.Z | 6181646c89f48b20680e2c5df3a8974c7c4dbb42 IV30367s06.130121.epkg.Z c59ba4b6cb6144c53881cea8fd3ba84250f62997 IV30365s04.121018.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; however, IBM does fully support them. 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 (from kb.isc.org) Setting the option 'minimal-responses' to 'yes' will prevent the lockup. 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. 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/79121 CVE-2012-5166: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-5166 *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) iD4DBQFRBtg94fmd+Ci/qhIRAh/sAJ9x/XTltIwHZpxGGhNRyJNX+tkmRACWLajD ZT/Oz0oHn6T47tz/iG3SIA== =mmso - -----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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