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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2006.0703 -- [AIX] Vulnerability in invscoutClient_VPD_Survey may allow for arbitrary file overwrite 27 September 2006 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: invscoutClient_VPD_Survey Publisher: IBM Operating System: AIX 5.3 AIX 5.2 Impact: Overwrite Arbitrary Files Access: Existing Account - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 IBM SECURITY ADVISORY First Issued: Mon Sep 25 10:00 CDT 2006 ========================================================================== VULNERABILITY SUMMARY VULNERABILITY: Arbitrary file overwrite vulnerability in invscoutClient_VPD_Survey PLATFORMS: Inventory Scout 2.2 for AIX 5.2 and AIX 5.3 SOLUTION: Apply the APAR, interim fix or workaround as described below. THREAT: A local user may overwrite an arbitrary file CERT VU Number: n/a CVE Number: n/a ========================================================================= DETAILED INFORMATION I. Description =============== A security vulnerability was discovered in invscoutClient_VPD_Survey that may allow a local user to overwrite an arbitrary file. invscoutClient_VPD_Survey is used by Inventory Scout when performing a survey of the Vital Product Database. This issue pertains to Inventory Scout 2.2.0.0 through 2.2.0.9. invscoutClient_VPD_Survey is shipped as part of invscout.rte. To determine which version of invscout.rte is installed, execute the following command: # lslpp -L invscout.rte If the fileset is installed it will be listed along with its version information, state, type and a description. II. Impact ========== A local user may overwrite an arbitrary file resulting in a denial of service. III. Solutions =============== A. Official Fix IBM provides the following fixes: APAR number for AIX 5.2.0: IY88735 (available approx. 10/04/2006) APAR number for AIX 5.3.0: IY88735 (available approx. 10/04/2006) NOTE: Affected customers are urged to upgrade to the latest applicable Technology Level. B. Interim Fix Interim fixes are available. The interim fixes can be downloaded via ftp from: ftp://aix.software.ibm.com/aix/efixes/security/invscoutClient_VPD_Survey.tar.Z This is a compressed tarball containing this advisory, interim fix packages and cleartext PGP signatures for each package. Verify you have retrieved the fixes intact: +------------------------------------------ The interim fixes below are named by using the APAR corresponding to the release that the fix applies to. The APAR is followed by an underscore and the Technology Level for the particular AIX release that a fix applies to. The checksums below were generated using the "sum" and "md5sum" commands and are as follows: The interim fixes below include prerequisite checking. This will enforce the correct mapping between the fixes and AIX Technology Levels. Filename sum md5 ========================================================================= IY88735_07.060823.epkg.Z 56011 2199 c45ffb7dbc38f59929b782f12143ff21 IY88735_08.060823.epkg.Z 13326 2201 5e191eda1dd5ce17b7baf457f2b7344a IY88735_09.060823.epkg.Z 39824 2201 284b0576b3e9dda66dc0f20dc47913d6 IY88735_03.060823.epkg.Z 21700 2199 d56929d46a38fdd41b4c585a4206d15a IY88735_04.060823.epkg.Z 49777 2207 c4cb368d4107b6ea5d3904f238577a6c IY88735_05.060823.epkg.Z 16178 2199 b4e3c09950cc33a1f4b6021dcc5c5036 These sums should match exactly. The PGP signatures in the compressed tarball and on this advisory can also be used to verify the integrity of the various files they correspond to. If the sums or signatures cannot be confirmed, double check the command results and the download site address. If those are OK, contact IBM AIX Security at security-alert@austin.ibm.com and describe the discrepancy. The following table shows the prerequisite lower and upper fileset levels for the fixes above. It also lists the Technology Level each fix should be applied to. These levels are inclusive and apply to invscout.rte. Filename Lower Level Upper Level Technology Level ========================================================================== IY88735_07.060823.epkg.Z 2.2.0.1 2.2.0.9 5200-07 IY88735_08.060823.epkg.Z 2.2.0.1 2.2.0.9 5200-08 IY88735_09.060823.epkg.Z 2.2.0.1 2.2.0.9 5200-09 IY88735_03.060823.epkg.Z 2.2.0.1 2.2.0.9 5300-03 IY88735_04.060823.epkg.Z 2.2.0.1 2.2.0.9 5300-04 IY88735_05.060823.epkg.Z 2.2.0.1 2.2.0.9 5300-05 IMPORTANT: If possible, it is recommended that a mksysb backup of the system is created. Verify it is both bootable, and readable before proceeding. Customers may contact IBM support if any issues arise with these interim fixes. Interim Installation Instructions: +--------------------------------- These packages use the new Interim Fix Management Solution to install and manage interim fixes. More information can be found at: http://www14.software.ibm.com/webapp/set2/sas/f/aix.efixmgmt/home.html To preview an epkg interim fix installation execute the following command: # emgr -e ipkg_name -p # where ipkg_name is the name of the # interim fix package being previewed. To install an epkg interim fix package, execute the following command: # emgr -e ipkg_name -X # where ipkg_name is the name of the # interim fix package being installed. The "X" flag will expand any filesystems if required. C. Workaround Remove the setuid bit from invscoutClient_VPD_Survey. This can be done as follows: # chmod 555 /opt/IBMinvscout/bin/invscoutClient_VPD_Survey Verify the changes: # ls -la /opt/IBMinvscout/bin/invscoutClient_VPD_Survey - - -r-xr-xr-x 1 root system 11755683 Feb 11 2005 /opt/IBMinvscout/bin/invscoutClient_VPD_Survey Note that this may prevent invscoutClient_VPD_Survey from functioning normally for non-root users. IV. Obtaining Fixes =================== AIX Version 5 APARs can be downloaded from: http://www.ibm.com/servers/eserver/support/unixservers/aixfixes.html Security related Interim Fixes can be downloaded from: ftp://aix.software.ibm.com/aix/efixes/security V. 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 send email to security-alert@austin.ibm.com with a subject of "get key". The key can also be downloaded from a PGP Public Key Server. The key id is 0x1B14F299. 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 v1.4.3 (GNU/Linux) iD8DBQFFEuC8ofN/JhsU8pkRAimlAJ4pgfj3HuRiEF1Cj6QjifYr3jtvFQCdHZSe LxZv7biJ8n3JlAZEbnM2lpU= =qBBP - -----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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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBRRnDayh9+71yA2DNAQKvqAP/W9EMeBCM9tUBeu8PaQ4JWGoDIUp8zd9e PH0Tn/RtBjiDvvmsqY9au5AXd47Il4DsHOEV6SM8gRftnv6old5X5RGTnwgCZiLO WWmlpuGRZwJSXU0DsHgMRoJ8vHCCXZ5ePorfKyhgstyjMxfP4UIx1XeJlt/DqbKy SeKb97yNRFU= =wTA2 -----END PGP SIGNATURE-----