-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 IBM SECURITY ADVISORY First Issued: Fri Jul 15 12:45:23 CDT 2011 | Updated: Mon Aug 1 17:35:29 CDT 2011 | Fixed 5.3.12.4 prerequisite failure | Updated: Thu Oct 27 10:08:12 CDT 2011 | Fixed 5.3.12.4 APAR number and updated WORKAROUND The most recent version of this document is available here: http://aix.software.ibm.com/aix/efixes/security/bind9_advisory2.asc VULNERABILITY SUMMARY VULNERABILITY: Denial of service vulnerability in BIND PLATFORMS: AIX 5.3, 6.1, and 7.1 releases SOLUTION: Apply the fix or workaround as described below. THREAT: A remote attacker can cause a denial of service CVE Number: CVE-2010-3614 CVE-2010-3613 Reboot required? NO Workarounds? NO DETAILED INFORMATION I. DESCRIPTION The security status of an NS RRset is not properly determined during a DNSKEY algorithm rollover which can allow a remote attacker to cause a denial of service. Signed negative responses and corresponding RRSIG records in the cache are not properly handled which can allow a remote attacker to cause a denial of service. Please see the following for more information: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3614 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3613 II. 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 5.3.12.4 bos.net.tcp.server 5.3.12.0 5.3.12.2 bos.net.tcp.client 6.1.4.0 6.1.4.10 bos.net.tcp.server 6.1.4.0 6.1.4.8 bos.net.tcp.client 6.1.5.0 6.1.5.6 bos.net.tcp.server 6.1.5.0 6.1.5.5 bos.net.tcp.client 6.1.6.0 6.1.6.15 bos.net.tcp.server 6.1.6.0 6.1.6.15 bos.net.tcp.client 7.1.0.0 7.1.0.15 bos.net.tcp.server 7.1.0.0 7.1.0.15 III. SOLUTION A. FIXES Fixes are now available. The fixes can be downloaded from: http://aix.software.ibm.com/aix/efixes/security/bind9_ifix2.tar The links above are to a tar file containing this signed advisory, fix packages, and PGP signatures for each package. AIX Level VIOS Level Fix ------------------------------------------------------ | 5.3.12 IZ99391s00.110729.epkg.Z 6.1.4 2.1.2.0 IV01118s00.110530.epkg.Z 6.1.5 2.1.3.0 IV01118s00.110530.epkg.Z 6.1.6 2.2.0.0 IV01118s00.110530.epkg.Z 7.1.0 IV01119s03.110531.epkg.Z To extract the fixes from the tar file: tar xvf bind9_ifix2.tar cd bind9_ifix2 Verify you have retrieved the fixes intact: The checksums below were generated using the "csum -h SHA1" (sha1sum) commands and are as follows: csum -h SHA1 (sha1sum) filename ------------------------------------------------------------------ | fbd0169a7ed08c4cb15f22120d356c569b9d26f9 IZ99391s00.110729.epkg.Z 3823bb9d423cc37652d6d4e79254cdc0cb7ef7ca IV01118s00.110530.epkg.Z 7db3c55c4cbbadcd40c87cf31bd91f96debea362 IV01119s03.110531.epkg.Z To verify the sums, use the text of this advisory as input to csum or sha1sum. For example: csum -h SHA1 -i bind9_advisory2.asc sha1sum -c bind9_advisory2.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 and describe the discrepancy at the following addresses: security-alert@austin.ibm.com B. 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. Fix management documentation can be found at: http://www14.software.ibm.com/webapp/set2/sas/f/aix.efixmgmt/home.html To preview fix installation: emgr -e fix_name -p # where fix_name is the name of the # fix being previewed. To install fix package: emgr -e fix_name -X # where fix_name is the name of the # fix being installed. C. APARS IBM has assigned the following APARs to this problem: AIX Level APAR number Service pack date -------------------------------------------------------- | 5.3.12 IV05251 10/21/11 sp5 6.1.4 IV02023 10/26/11 sp11 6.1.5 IV01118 10/21/11 sp7 6.1.6 IV02024 10/21/11 sp6 7.1.0 IV01119 11/16/11 sp4 Subscribe to the APARs here: | http://www.ibm.com/support/docview.wss?uid=isg1IV05251 http://www.ibm.com/support/docview.wss?uid=isg1IV02023 http://www.ibm.com/support/docview.wss?uid=isg1IV01118 http://www.ibm.com/support/docview.wss?uid=isg1IV02024 http://www.ibm.com/support/docview.wss?uid=isg1IV01119 By subscribing, you will receive periodic email alerting you to the status of the APAR, and a link to download the service pack when it becomes available. IV. WORKAROUND | There are no workarounds available other than disabling the named service. VI. CONTACT INFORMATION If you would like to receive AIX Security Advisories via email, please visit: http://www.ibm.com/systems/support and click on the "My notifications" link. To view previously issued advisories, 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 obtain 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 our web page: http://www.ibm.com/systems/resources/systems_p_os_aix_security_pgpkey.txt C. 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. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (AIX) iD8DBQFOqXZY4fmd+Ci/qhIRAiD5AJ9+IEkNs9cgHOOMn5z24ivtGBqgwACfWeKz /l+PPDwYjj1tBgFhRKr4/Rw= =OcZS -----END PGP SIGNATURE-----