===================================================================== CERT-Renater Note d'Information No. 2009/VULN442 _____________________________________________________________________ DATE : 05/11/2009 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : AIX running PowerHA Cluster Management. ====================================================================== http://aix.software.ibm.com/aix/efixes/security/haport_advisory.asc ______________________________________________________________________ IBM SECURITY ADVISORY First Issued: Wed Nov 4 10:02:21 CST 2009 The most recent version of this document is available here: http://aix.software.ibm.com/aix/efixes/security/haport_advisory.asc or ftp://aix.software.ibm.com/aix/efixes/security/haport_advisory.asc VULNERABILITY SUMMARY VULNERABILITY: PowerHA Cluster Management port vulnerability PLATFORMS: AIX 5.3, 6.1, and earlier releases SOLUTION: Apply the fix or workaround as described below. THREAT: A remote user may may make arbitrary changes to the AIX configuration. Reboot required? NO Workarounds? YES Protected by FPM? NO Protected by SED? NO DETAILED INFORMATION I. DESCRIPTION PowerHA Cluster Management monitoring of port 6177 allows a remote attacker to make arbitrary changes to the local AIX configuration. II. PLATFORM VULNERABILITY ASSESSMENT To determine if your system is vulnerable, execute the following command: lslpp -L cluster.es.server.diag The following fileset levels are vulnerable: PowerHA Release Lower Level Upper Level (Service Pack) -------------------------------------------------------------- 5.4 5.4.0.0 5.4.0.2 (SP02) 5.4.1 5.4.1.0 5.4.1.6 (SP06) 5.5 5.5.0.0 5.5.0.2 (SP03) 6.1 6.1.0.0 6.1.0.0 (BASE) III. SOLUTIONS A. APARS IBM has assigned the following APARs to this problem: PowerHA Release APAR number Availability ------------------------------------------------------------------- 5.4.1 IZ61325 November 2009 5.5 IZ61323 October 2009 6.1 IZ62630 December 2009 B. FIXES Fixes are now available. The fixes can be downloaded from: ftp://aix.software.ibm.com/aix/efixes/security/haport_fix.tar http://aix.software.ibm.com/aix/efixes/security/haport_fix.tar The links above are to a tar file containing this signed advisory, fix packages, and PGP signatures for each package. PowerHA Level Interim Fix (*.Z) --------------------------------- 5.4 SP02 IZ61325_02.Z 5.4.1 BASE IZ61325gld.Z 5.4.1 SP01 IZ61325s1.Z 5.4.1 SP02 IZ61325s2.Z 5.4.1 SP03 IZ61325s3.Z 5.4.1 SP04 IZ61325s4.Z 5.4.1 SP05 IZ61325s5.Z 5.4.1 SP06 IZ61325s6.Z 5.5 BASE IZ61323gld.Z 5.5 SP01&SP02 IZ61323s12.Z 5.5 SP03 IZ61323s3.Z 6.1 BASE IZ62630gld.Z To extract the fixes from the tar file: tar xvf haport_fix.tar cd haport_fix 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 ----------------------------------------------------------- b8efa85cfb8c5d4b169ff48ea633207e330c6635 IZ61323gld.epkg.Z 82e90682da9c7d5e0c670e1a8366be5ef6173003 IZ61323s12.epkg.Z 14fbc05c250648d9d148540a2eb491067378282b IZ61323s3.epkg.Z 4624a6f393b4c03f4ac9b111d1fa0d3e58c1a7d5 IZ61325_02.epkg.Z 9b477cf92066f1f0e085a6f276b3b363cf00aae1 IZ61325gld.epkg.Z c4658f916ccd775fd55494f3023d3a6a7991cab9 IZ61325s1.epkg.Z 3e0a519ba0a23cef1b23ad2505d2ca8a3a95e2ff IZ61325s2.epkg.Z bfc4b1a3d720e3eb021d995b786e3de4ca6ceb4e IZ61325s3.epkg.Z 464abbc11a6adaf37f61a355ff5a1c2a528b2a39 IZ61325s4.epkg.Z 51574776245883b140d770ccb80132fce03355cd IZ61325s5.epkg.Z 89969dcc826640cbf7a0e51654a33385c6628ad6 IZ61325s6.epkg.Z b31438a891948f852b45f0ebbc69963e0a6ee290 IZ62630gld.epkg.Z To verify the sums, use the text of this advisory as input to csum or 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 and describe the discrepancy at the following address: security-alert@austin.ibm.com C. 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. 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. IV. WORKAROUNDS Run the following commands to comment out the lines in /etc/inetd.conf and /etc/services dealing with the 'godm' service and recycle the inetd daemon. Note that subsequent attempts to verify the cluster will fail, which will effectivly disable dynamic reconfiguration. chsubserver -d -v godm -p tcp chservices -d -v godm -p tcp -n 6177 refresh -s inetd The workaround can be removed by executing the following commands: chsubserver -a -v godm -p tcp -t stream -w nowait -u root \ -g /usr/es/sbin/cluster/godmd chservices -a -v godm -p tcp -n 6177 refresh -s inetd V. 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. Download the key from our web page: http://www.ibm.com/systems/resources/systems_p_os_aix_security_pgpkey.txt B. Download the key from a PGP Public Key Server. The key ID is: 0xADA6EB4D 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. ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================