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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.1570 Security Bulletin: IBM has released the following fixes for AIX and VIOS in response to Speculative Store Bypass (SSB), also known as Variant 4 23 May 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM AIX IBM VIOS Publisher: IBM Operating System: AIX Impact/Access: Access Privileged Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-3639 Reference: ASB-2018.0121 ESB-2018.1554 ESB-2018.1550 ESB-2018.1549 Original Bulletin: http://www.ibm.com/support/docview.wss?uid=isg3T1027700 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: IBM has released the following fixes for AIX and VIOS in response to Speculative Store Bypass (SSB), also known as Variant 4. Document information More support for: AIX family Software version: 5.3, 6.1, 7.1, 7.2 Operating system(s): AIX Reference #: T1027700 Modified date: 22 May 2018 Summary IBM has released the following fixes for AIX and VIOS in response to CVE-2018-3639. Vulnerability Details CVEID: CVE-2018-3639 Affected Products and Versions AIX 5.3, 6.1, 7.1, 7.2 VIOS 2.2.x The vulnerabilities in the following filesets are being addressed: key_fileset = aix Fileset Lower Level Upper Level KEY - --------------------------------------------------------- bos.mp64 5.3.12.0 5.3.12.10 key_w_fs bos.mp64 6.1.9.0 6.1.9.316 key_w_fs bos.mp64 7.1.4.0 7.1.4.34 key_w_fs bos.mp64 7.1.5.0 7.1.5.16 key_w_fs bos.mp64 7.2.0.0 7.2.0.6 key_w_fs bos.mp64 7.2.1.0 7.2.1.5 key_w_fs bos.mp64 7.2.2.0 7.2.2.16 key_w_fs To find out whether the affected filesets are installed on your systems, refer to the lslpp command found in AIX user's guide. Example: lslpp -L | grep -i bos.mp64 Note: AIX or VIOS users of all fileset levels should continue to monitor their My Notifications alerts and the IBM PSIRT Blog for additional information about these vulnerabilities: - - My Notifications http://www.ibm.com/support/mynotifications - - IBM PSIRT Blog - Potential Impact on Processors in the Power Family https://www.ibm.com/blogs/psirt/potential-impact-processors-power-family/ Remediation/Fixes A. APARS IBM has assigned the following APARs to this problem: AIX Level APAR Availability SP KEY - ------------------------------------------------ 5.3.12 IJ05826 N/A N/A key_w_apar 6.1.9 IJ05824 ** SP12 key_w_apar 7.1.4 IJ05823 ** SP7 key_w_apar 7.1.5 IJ05822 ** SP3 key_w_apar 7.2.0 IJ05821 ** N/A key_w_apar 7.2.1 IJ05820 ** SP5 key_w_apar 7.2.2 IJ05818 ** SP3 key_w_apar VIOS Level APAR Availability SP KEY - ------------------------------------------------ 2.2.4 IJ05824 ** N/A key_w_apar 2.2.5 IJ05824 ** N/A key_w_apar 2.2.6 IJ05824 ** 2.2.6.22 key_w_apar The relevant APARs will also be included in 7.1.5 and 7.2.2 SPs with a build id of 1831 or later. Subscribe to the APARs here: http://www.ibm.com/support/docview.wssuid=isg1IJ05818 http://www.ibm.com/support/docview.wssuid=isg1IJ05820 http://www.ibm.com/support/docview.wssuid=isg1IJ05821 http://www.ibm.com/support/docview.wssuid=isg1IJ05822 http://www.ibm.com/support/docview.wssuid=isg1IJ05823 http://www.ibm.com/support/docview.wssuid=isg1IJ05824 https://www.ibm.com/support/docview.wssuid=isg1IJ05818 https://www.ibm.com/support/docview.wssuid=isg1IJ05820 https://www.ibm.com/support/docview.wssuid=isg1IJ05821 https://www.ibm.com/support/docview.wssuid=isg1IJ05822 https://www.ibm.com/support/docview.wssuid=isg1IJ05823 https://www.ibm.com/support/docview.wssuid=isg1IJ05824 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 AIX and VIOS fixes are available. An LPAR system reboot is required to complete the iFix installation, or Live Update may be used on AIX 7.2 to avoid a reboot. The AIX/VIOS fixes can be downloaded via ftp or http from: ftp://aix.software.ibm.com/aix/efixes/security/variant4_fix.tar http://aix.software.ibm.com/aix/efixes/security/variant4_fix.tar https://aix.software.ibm.com/aix/efixes/security/variant4_fix.tar The link above is to a tar file containing this signed advisory, fix packages, and OpenSSL 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) KEY - ---------------------------------------------- 5.3.12.9 IJ05826m9b.180427.epkg.Z key_w_fix 6.1.9.11 IJ05824sBa.180426.epkg.Z key_w_fix 7.1.4.6 IJ05823m6a.180426.epkg.Z key_w_fix 7.1.5.2 IJ05822s2a.180426.epkg.Z key_w_fix 7.2.0.6 IJ05821m6a.180424.epkg.Z key_w_fix 7.2.1.4 IJ05820m4a.180423.epkg.Z key_w_fix 7.2.2.2 IJ05818s2a.180420.epkg.Z key_w_fix Please note that the above table refers to AIX TL/SP level as opposed to fileset level, i.e., 7.2.2.1 is AIX 7200-02-01. The provided iFixes for 7.1.5.2 and 7.2.2.2 are not required on SPs with a build id of 1831 or later. Please run "oslevel -s" to view installed build id. Please reference the Affected Products and Version section above for help with checking installed fileset levels. VIOS Level Interim Fix (*.Z) KEY - ----------------------------------------------- 2.2.4.60 IJ05824sBa.180426.epkg.Z key_w_fix 2.2.5.40 IJ05824sBa.180426.epkg.Z key_w_fix 2.2.6.20 IJ05824sBa.180426.epkg.Z key_w_fix 2.2.6.21 IJ05824sBa.180426.epkg.Z key_w_fix To extract the fixes from the tar file: tar xvf variant4_fix.tar cd variant4_fix Verify you have retrieved the fixes intact: The checksums below were generated using the "openssl dgst -sha256 file" command as the following: openssl dgst -sha256 filename KEY - ----------------------------------------------------------------------------------------------------- da5f493bd51051336c7528ba8667c8dd9272db4ba06ee5ef9f943c0a2a39baad IJ05818s2a.180420.epkg.Z key_w_csum 80d4263c0e231c18a752b943f522d71516db850466f820149cd81a0c53b68352 IJ05820m4a.180423.epkg.Z key_w_csum 28b2171be5442994394b39410c2db05569223fc3fcff0c552c3b8ddf210f7107 IJ05821m6a.180424.epkg.Z key_w_csum 5e6be49f5563f5a89d4ecc5ea5c52e06ac9f7c7749b9b217ba3abf34bb4a49b8 IJ05822s2a.180426.epkg.Z key_w_csum dc013e5f65263db7bd2cb35efa29dffacfe886996d072b459f51d22cdf646a2f IJ05823m6a.180426.epkg.Z key_w_csum 4fa9372d4137265fef88aeb5af36dc1745467cc9f35deb01e6c850ea67b06b66 IJ05824sBa.180426.epkg.Z key_w_csum 4b4dc4961f3a27cd6774ce37bf980ded29cbd962031014e067e117ce0b474c53 IJ05826m9b.180427.epkg.Z key_w_csum These sums should match exactly. The OpenSSL 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 Support at http://ibm.com/ support/ and describe the discrepancy. openssl dgst -sha1 -verify [pubkey_file] -signature [advisory_file].sig [advisory_file] openssl dgst -sha1 -verify [pubkey_file] -signature [ifix_file].sig [ifix_file] Published advisory OpenSSL signature file location: http://aix.software.ibm.com/aix/efixes/security/variant4_advisory.asc.sig https://aix.software.ibm.com/aix/efixes/security/variant4_advisory.asc.sig ftp://aix.software.ibm.com/aix/efixes/security/variant4_advisory.asc.sig C. FIX AND INTERIM FIX INSTALLATION An LPAR system reboot is required to complete the iFix installation, or Live Update may be used on AIX 7.2 to avoid a reboot. 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. Workarounds and Mitigations None. Get Notified about Future Security Bulletins Subscribe to My Notifications to be notified of important product support alerts like this. References Complete CVSS v2 Guide On-line Calculator v2 Complete CVSS v3 Guide On-line Calculator v3 Related information IBM Secure Engineering Web Portal IBM Product Security Incident Response Blog IBM PSIRT Blog - Potential Impact on Processors in the Power Family AIX Security Bulletin (ASCII format) Acknowledgement The vulnerability was reported to IBM by Google Project Zero. *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 Security Bulletin. Disclaimer 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. - --------------------------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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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWwTwj4x+lLeg9Ub1AQhDzQ//QPFwFAEwLRjGwhsQY8yMlJTqt5yLPnqE y2YVQWFnSBNt6czs7Hw/HGUxuPOVQAHfmnPdGAKitYbJ7eaqDoB7VmV9Zre3GNie 3HGbdfDr64EiaYakgn0nnnRPV6jaqSt9+s/jikuKY8OSP8PVAvDNAlijR5872uac omD++nAGjcl6fv02Wf4nY/bXS/3/BfMkMqrvfzYC7dRJ+4NZlXRaE96LJx6EYfle XmW4mGRyLf0UczMiijYOYfMWC6ExgCD1kdt0jaXp98YkizyolLcbe846/HhyWwdy IOGvm8tRGqwV4zUyMltLQ58DZf6duWO6CKA3Q2bKH4I1dXEjpIPlbN2C86yqfFby CD45lc99WInZNcjrTS94PsRWI5kc3d2bIVGJ8nehk0UF+cBtujk4aGYL5JRgEMlQ oANlhTPCixf8jG5Vd5MNsewikh8bXEjpYcjuMgYS27HrmSzj+fYx5h6Pku/2nkRE 0jJaDkALvLd8Gv9thzt4AtPLUt39Azukt4CO6UpbGzdE2EIKwx/GRwapGG8I6TKR uQPxE9Ma2NVM2AbQsAtMvVWh9K6I23zgj+niqPA+xXU0kzYWXMkqF4kXx9P9D2Df xtne0A+YlvnTt8pXQiZHUGVZ7dNHD4AN0AxD8f/utUt2brcSLfZdqU3LUI0DEGXO A+QFlIHQVaI= =aI7q -----END PGP SIGNATURE-----