IBM SECURITY ADVISORY First Issued: Tue Dec 11 09:32:52 CST 2018 |Updated: Tue Apr 9 09:52:17 CDT 2019 |Update: Added AIX 7100-04-07 and 7200-02-03 as affected. | Added iFixes for AIX 7100-04-07 and 7200-02-03. The most recent version of this document is available here: http://aix.software.ibm.com/aix/efixes/security/xorg_advisory3.asc https://aix.software.ibm.com/aix/efixes/security/xorg_advisory3.asc ftp://aix.software.ibm.com/aix/efixes/security/xorg_advisory3.asc Security Bulletin: Vulnerability in Xorg affects AIX (CVE-2018-14665) =============================================================================== SUMMARY: There is a vulnerability in Xorg that affects AIX. =============================================================================== VULNERABILITY DETAILS: CVEID: CVE-2018-14665 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14665 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14665 DESCRIPTION: X.Org X server could allow a remote authenticated attacker to gain elevated privileges on the system, caused by improper validation of command line parameters. An attacker could exploit this vulnerability using the -modulepath argument or the -logfile argument to overwrite arbitrary files and execute unprivileged code on the system. CVSS Base Score: 8.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/151991 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) AFFECTED PRODUCTS AND VERSIONS: AIX 6.1, 7.1, 7.2 VIOS 2.2.x The following fileset levels are vulnerable: key_fileset = aix Fileset Lower Level Upper Level KEY --------------------------------------------------------- X11.base.rte 6.1.9.0 6.1.9.100 key_w_fs | X11.base.rte 7.1.4.0 7.1.4.31 key_w_fs X11.base.rte 7.1.5.0 7.1.5.31 key_w_fs X11.base.rte 7.2.0.0 7.2.0.1 key_w_fs X11.base.rte 7.2.1.0 7.2.1.0 key_w_fs | X11.base.rte 7.2.2.0 7.2.2.16 key_w_fs X11.base.rte 7.2.3.0 7.2.3.15 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 X11.base.rte REMEDIATION: A. APARS IBM has assigned the following APARs to this problem: AIX Level APAR Availability SP KEY ------------------------------------------------ 6.1.9 IJ11000 ** N/A key_w_apar 7.1.4 IJ11544 ** SP08 key_w_apar 7.1.5 IJ11544 ** N/A key_w_apar 7.1.5 IJ11545 ** SP04 key_w_apar 7.2.0 IJ11546 ** N/A key_w_apar 7.2.1 IJ11547 ** SP06 key_w_apar 7.2.2 IJ11549 ** SP04 key_w_apar 7.2.3 IJ11550 ** SP03 key_w_apar VIOS Level APAR Availability SP KEY ---------------------------------------------------- 2.2.4 IJ11000 ** N/A key_w_apar 2.2.5 IJ11000 ** 2.2.5.60 key_w_apar 2.2.6 IJ11000 ** 2.2.6.40 key_w_apar 3.1.0 IJ11550 ** 3.1.0.20 key_w_apar Subscribe to the APARs here: http://www.ibm.com/support/docview.wss?uid=isg1IJ11000 http://www.ibm.com/support/docview.wss?uid=isg1IJ11544 http://www.ibm.com/support/docview.wss?uid=isg1IJ11545 http://www.ibm.com/support/docview.wss?uid=isg1IJ11546 http://www.ibm.com/support/docview.wss?uid=isg1IJ11547 http://www.ibm.com/support/docview.wss?uid=isg1IJ11549 http://www.ibm.com/support/docview.wss?uid=isg1IJ11550 https://www.ibm.com/support/docview.wss?uid=isg1IJ11000 https://www.ibm.com/support/docview.wss?uid=isg1IJ11544 https://www.ibm.com/support/docview.wss?uid=isg1IJ11545 https://www.ibm.com/support/docview.wss?uid=isg1IJ11546 https://www.ibm.com/support/docview.wss?uid=isg1IJ11547 https://www.ibm.com/support/docview.wss?uid=isg1IJ11549 https://www.ibm.com/support/docview.wss?uid=isg1IJ11550 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. The AIX and VIOS fixes can be downloaded via ftp or http from: ftp://aix.software.ibm.com/aix/efixes/security/xorg_fix3.tar http://aix.software.ibm.com/aix/efixes/security/xorg_fix3.tar https://aix.software.ibm.com/aix/efixes/security/xorg_fix3.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 ---------------------------------------------- 6.1.9.x IJ11000s0b.181127.epkg.Z key_w_fix 7.1.4.4 IJ11544s0a.181127.epkg.Z key_w_fix 7.1.4.5 IJ11544s0a.181127.epkg.Z key_w_fix 7.1.4.6 IJ11544s0a.181127.epkg.Z key_w_fix | 7.1.4.7 IJ11544s0a.190312.epkg.Z key_w_fix 7.1.5.0 IJ11544s0a.181127.epkg.Z key_w_fix 7.1.5.1 IJ11544s0a.181127.epkg.Z key_w_fix 7.1.5.2 IJ11544s0a.181127.epkg.Z key_w_fix 7.1.5.3 IJ11544s0a.181127.epkg.Z key_w_fix 7.1.5.3 IJ11545s0a.181127.epkg.Z key_w_fix 7.2.0.x IJ11546s0a.181127.epkg.Z key_w_fix 7.2.1.x IJ11547s0a.181127.epkg.Z key_w_fix 7.2.2.x IJ11549s0a.181127.epkg.Z key_w_fix 7.2.2.0 IJ11549s0a.181127.epkg.Z key_w_fix 7.2.2.1 IJ11549s0a.181127.epkg.Z key_w_fix 7.2.2.2 IJ11549s0a.181127.epkg.Z key_w_fix | 7.2.2.3 IJ11549s0a.190312.epkg.Z key_w_fix 7.2.3.x IJ11550s0a.181127.epkg.Z key_w_fix Please reference the Affected Products and Version section above for help with checking installed fileset levels. NOTE: Multiple iFixes are provided for AIX 7100-05-03. IJ11544s0a is for AIX 7100-05-03 with X11.base.rte fileset level 7.1.4.30. IJ11545s0a is for AIX 7100-05-03 with X11.base.rte fileset level 7.1.5.31. VIOS Level Interim Fix (*.Z) KEY ----------------------------------------------- 2.2.x IJ11000s0b.181127.epkg.Z key_w_fix 3.1.x IJ11550s0a.181127.epkg.Z key_w_fix To extract the fixes from the tar file: tar xvf xorg_fix3.tar cd xorg_fix3 Verify you have retrieved the fixes intact: The checksums below were generated using the "openssl dgst -sha256 [filename]" command as the following: openssl dgst -sha256 filename KEY ----------------------------------------------------------------------------------------------------- 81a407e154ab90e003135bf075f171b127d811e3a9177cb866d589ff2459ef19 IJ11000s0b.181127.epkg.Z key_w_csum 458f8391ceabeedf418f54595ce9ef87d63a667369dc4a3112b8548bff80fb6d IJ11544s0a.181127.epkg.Z key_w_csum | 2b719e0b4d8bdcb89f97ffe1ecceccfbf0538cb2cdec66b8214eeae7c7b37958 IJ11544s0a.190312.epkg.Z key_w_csum 041e1271b858211365025a4528c71f453c72405a1f0809128e0c70d49886a166 IJ11545s0a.181127.epkg.Z key_w_csum 1f4f7a7ef34c7804464ccdc02f1a253ac373a9c66ee3144350b390509976cfad IJ11546s0a.181127.epkg.Z key_w_csum 8aac56821f52600ee3158efa39e0bf697813712364b946c199fbb32dd1da9ce6 IJ11547s0a.181127.epkg.Z key_w_csum 7518d581224e6b4332b4cfab48253a7427fb0e3ab866567766b2d137bc0e9267 IJ11549s0a.181127.epkg.Z key_w_csum | 0eea9877dcaf6ffbd6c0d7572fd7ceb6437ef1f0b2f3134a22afc47260e9e7c5 IJ11549s0a.190312.epkg.Z key_w_csum f18e4f2efd4f488e7a02de90bfa6992b604298dba1d588689d4e58e71b3738db IJ11550s0a.181127.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/xorg_advisory3.asc.sig https://aix.software.ibm.com/aix/efixes/security/xorg_advisory3.asc.sig ftp://aix.software.ibm.com/aix/efixes/security/xorg_advisory3.asc.sig C. FIX AND INTERIM FIX INSTALLATION 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. =============================================================================== CONTACT US: Note: Keywords labeled as KEY in this document are used for parsing purposes. If you would like to receive AIX Security Advisories via email, please visit "My Notifications": http://www.ibm.com/support/mynotifications To view previously issued advisories, please visit: http://www14.software.ibm.com/webapp/set2/subscriptions/onvdq Contact IBM Support for questions related to this announcement: http://ibm.com/support/ https://ibm.com/support/ To obtain the OpenSSL public key that can be used to verify the signed advisories and ifixes: Download the key from our web page: ftp://ftp.software.ibm.com/systems/power/AIX/systems_p_os_aix_security_pubkey.txt Please contact your local IBM AIX support center for any assistance. REFERENCES: Complete CVSS v3 Guide: http://www.first.org/cvss/user-guide On-line Calculator v3: http://www.first.org/cvss/calculator/3.0 RELATED INFORMATION: IBM Secure Engineering Web Portal http://www.ibm.com/security/secure-engineering/bulletins.html IBM Product Security Incident Response Blog https://www.ibm.com/blogs/psirt/ Security Bulletin: Vulnerability in Xorg affects AIX (CVE-2018-14665) https://www-01.ibm.com/support/docview.wss?uid=ibm10742279 ACKNOWLEDGEMENTS: None. CHANGE HISTORY: First Issued: Tue Dec 11 09:32:52 CST 2018 Updated: Mon Dec 17 08:33:34 CST 2018 Update: Corrected the iFixes listed for AIX 7100-05. | Updated: Tue Apr 9 09:52:17 CDT 2019 | Update: Added AIX 7100-04-07 and 7200-02-03 as affected. | Added iFixes for AIX 7100-04-07 and 7200-02-03. =============================================================================== *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.