-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 IBM SECURITY ADVISORY First Issued: Fri Jul 13 13:28:29 CDT 2012 The most recent version of this document is available here: | Updated: Thu Oct 25 05:15:16 CDT 2012 | Update: New ifixes for the latest SP's | Update: Corrected file name http://aix.software.ibm.com/aix/efixes/security/bind9_advisory4.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-2012-1667 Reboot required? NO Workarounds? NO Protected by FPM? NO Protected by SED? NO =============================================================================== DETAILED INFORMATION I. DESCRIPTION Adding records to BIND with zero length rdata fields could result in memory disclosure to client, data corruption or system crash II. CVSS CVSS Base Score: 5 CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/76034 for the current score CVSS Environmental Score*: Undefined CVSS String: (AV:N/AC:L/Au:N/C:N/I:N/A:P) 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 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 6.1.6.20 | bos.net.tcp.server 6.1.6.0 6.1.6.19 bos.net.tcp.client 6.1.7.0 6.1.7.16 bos.net.tcp.server 6.1.7.0 6.1.7.16 | bos.net.tcp.client 7.1.0.0 7.1.0.21 | bos.net.tcp.server 7.1.0.0 7.1.0.19 bos.net.tcp.client 7.1.1.0 7.1.1.16 bos.net.tcp.server 7.1.1.0 7.1.1.16 IV. SOLUTIONS A. APARS IBM has assigned the following APARs to this problem: AIX Level APAR number Availability --------------------------------------------------- 5.3.12 IV22625 01/04/13 sp7 6.1.6 IV22554 12/12/12 sp10 6.1.7 IV22555 12/12/12 sp6 7.1.0 IV22556 12/12/12 sp8 7.1.1 IV22557 12/12/12 sp6 Subscribe to the APARs here: http://www.ibm.com/support/docview.wss?uid=isg1IV22625 http://www.ibm.com/support/docview.wss?uid=isg1IV22554 http://www.ibm.com/support/docview.wss?uid=isg1IV22555 http://www.ibm.com/support/docview.wss?uid=isg1IV22556 http://www.ibm.com/support/docview.wss?uid=isg1IV22557 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_fix4.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 IV22625m06.120713.epkg.Z 6.1.6.8 IV22554m07.120713.epkg.Z | 6.1.6.9 IV22554s09.121004.epkg.Z 6.1.7.4 IV22555m04.120713.epkg.Z | 6.1.7.5 IV22555m05.121012.epkg.Z 7.1.0.6 IV22556m05.120711.epkg.Z | 7.1.0.7 IV22556s07.121004.epkg.Z 7.1.1.4 IV22557m04.120713.epkg.Z | 7.1.1.5 IV22557m05.121012.epkg.Z VIOS Level Interim Fix (*.Z) ------------------------------------------------------------------- 2.2.1.4-FP-25 SP-02 IV22555m04.120713.epkg.Z To extract the fixes from the tar file: tar xvf bind9_fix4.tar cd bind9_fix4 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 ------------------------------------------------------------------ 00ca9d1246cc1539d4fbfb7500f6318d471d4c83 IV22625m06.120713.epkg.Z cc1e07a12b40c0b3eb47cf4913769d8f026ca2fe IV22554m07.120713.epkg.Z | 5f6a4f4aa6c527f1d2dd43be9f955789156d0d7b IV22554s09.121004.epkg.Z c663fb1885dbe8efb4a6ccef93d4729f0dd27cb8 IV22555m04.120713.epkg.Z | 4a9677e68b11ebdad531e69de1c1c61d8b623867 IV22555m05.121012.epkg.Z 4dd1fb14f39f5fe1be1eecf35af6556b2b3ea560 IV22556m05.120711.epkg.Z | 70f070dc7f3905ea4295877891c86f63edf0eb42 IV22556s07.121004.epkg.Z 2d7145be2ffdc0254d5ee16e9e45fd9aa3af9681 IV22557m04.120713.epkg.Z | af7c2db69717995377c1961ec1265395275c505a IV22557m05.121012.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 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. 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/76034 CVE-2012-1667: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-1667 *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) iD8DBQFQicmZ4fmd+Ci/qhIRAlnoAKCJ/5cWqe52ME/BohWsVGxIixySXwCcDpjy A8i2w1qRi6S4BVS57e4GeLA= =LCmM -----END PGP SIGNATURE-----