-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 IBM SECURITY ADVISORY First Issued: Tue Jan 22 14:02:18 CST 2008 | Updated: Wed Apr 23 11:56:00 CDT 2008 | Vulnerability assessment fileset levels updated =============================================================================== VULNERABILITY SUMMARY VULNERABILITY: AIX ps information leak PLATFORMS: AIX 5.2, 5.3, 6.1 SOLUTION: Apply the fix as described below. THREAT: A local attacker may access sensitive information. CERT VU Number: n/a CVE Number: n/a =============================================================================== DETAILED INFORMATION I. OVERVIEW The ps command shows current status of processes. The primary fileset for the ps command is'bos.rte.control'. The ps command allows local users to obtain sensitive information. II. DESCRIPTION An information leak exists in the 'bos.rte.control' fileset commands listed below. A local attacker may access sensitive information for arbitrary processes. The following commands are vulnerable: /usr/bin/ps III. IMPACT The successful exploitation of this vulnerability allows a non-privileged user to access sensitive data for arbitrary processes. IV. PLATFORM VULNERABILITY ASSESSMENT To determine if your system is vulnerable, execute the following command: lslpp -L bos.rte.control The following fileset levels are vulnerable: AIX Fileset Lower Level Upper Level ------------------------------------------------ | bos.rte.control 5.2.0.0 5.2.0.108 | bos.rte.control 5.3.0.0 5.3.0.66 | bos.rte.control 5.3.7.0 5.3.7.3 bos.rte.control 6.1.0.0 6.1.0.3 V. SOLUTIONS A. APARS IBM provides the following fixes: AIX Level APAR number Availability --------------------------------------------------- 5.2.0 IZ11242 05/14/08 5.3.0 IZ12745 04/30/08 5.3.7 IZ11243 04/30/08 6.1.0 IZ11244 02/20/08 Subscribe to the APARs here: http://www.ibm.com/support/docview.wss?uid=isg1IZ11242 http://www.ibm.com/support/docview.wss?uid=isg1IZ12745 http://www.ibm.com/support/docview.wss?uid=isg1IZ11243 http://www.ibm.com/support/docview.wss?uid=isg1IZ11244 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/ps_ifix.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 ------------------------------------------------------------------- 5.2.0 TL8 IZ11242_08.080110.epkg.Z 5.2.0 TL9 IZ11242_09.080110.epkg.Z 5.2.0 TL10 IZ11242_10.080110.epkg.Z 5.3.0 TL5 IZ12745_05.080110.epkg.Z 5.3.0 TL6 IZ12745_06.080110.epkg.Z 5.3.7 IZ11243_07.080110.epkg.Z 6.1.0 IZ11244_00.080110.epkg.Z To extract the fixes from the tar file: tar xvf ps_ifix.tar cd ps_ifix Verify you have retrieved the fixes intact: The checksums below were generated using the "sum", "cksum", "csum -h MD5" (md5sum), and "csum -h SHA1" (sha1sum) commands and are as follows: sum filename ------------------------------------ 59999 42 IZ11242_08.080110.epkg.Z 38864 42 IZ11242_09.080110.epkg.Z 58751 44 IZ11242_10.080110.epkg.Z 53743 57 IZ11243_07.080110.epkg.Z 06072 64 IZ11244_00.080110.epkg.Z 28757 56 IZ12745_05.080110.epkg.Z 46095 57 IZ12745_06.080110.epkg.Z cksum filename ------------------------------------------ 3753955418 42918 IZ11242_08.080110.epkg.Z 656903653 42924 IZ11242_09.080110.epkg.Z 3128991594 44510 IZ11242_10.080110.epkg.Z 2217046042 58015 IZ11243_07.080110.epkg.Z 4248777175 64931 IZ11244_00.080110.epkg.Z 2572937489 56417 IZ12745_05.080110.epkg.Z 2883305420 58229 IZ12745_06.080110.epkg.Z csum -h MD5 (md5sum) filename ---------------------------------------------------------- 72b7caf42d62b438c678e27b053dd80a IZ11242_08.080110.epkg.Z 139afb750077e7006017a931f2126ae1 IZ11242_09.080110.epkg.Z 02b8a618b122b10c7a19d380aca5be9c IZ11242_10.080110.epkg.Z 5b68cd5246cdedbf43c1e76a9d89a027 IZ11243_07.080110.epkg.Z 2822aac0854e313aabbf995d303164d9 IZ11244_00.080110.epkg.Z b2d7d7d6d7521e9da97d76717f58eb6e IZ12745_05.080110.epkg.Z a4691536c95383269ddfdc36534df353 IZ12745_06.080110.epkg.Z csum -h SHA1 (sha1sum) filename ------------------------------------------------------------------ 7c8382e31fc29c00b48f1d861b48e61424a8f8d5 IZ11242_08.080110.epkg.Z 7fcb56363ba3f67525949b49b598654fcf0e99ec IZ11242_09.080110.epkg.Z 0c2cf89f03c2d3ec7ee931ef5fad1cae2d1b1025 IZ11242_10.080110.epkg.Z edffff38b42a068a40854f78ad9dbe24daabad40 IZ11243_07.080110.epkg.Z ab7c528a8f851410835640edef9d4457b41a8ba7 IZ11244_00.080110.epkg.Z c6bd4e3e40c0c2c8bbdc79cd569799e7baf4df5a IZ12745_05.080110.epkg.Z acfa10d0c5e24e8f6b00a898d114e1bb2b560412 IZ12745_06.080110.epkg.Z To verify the sums, use the text of this advisory as input to csum, md5sum, or sha1sum. For example: csum -h SHA1 -i Advisory.asc md5sum -c 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. 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. VI. WORKAROUNDS There are no workarounds available. VII. OBTAINING FIXES AIX security related 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. VIII. 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: | 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. IX. ACKNOWLEDGMENTS Andrea "bunker" Purificato reported this vulnerability. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (AIX) iD8DBQFIELB3P9Qud62m600RApepAJ40xU8PFoXgrhkIeljaw3XIPF9VVACgnX5r cdhg12/uQCFyV0G9/flStV4= =VFWx -----END PGP SIGNATURE-----