IBM SECURITY ADVISORY First Issued: Wed Jun 17 09:52:06 CDT 2015 |Updated: Tue Mar 1 10:07:14 CST 2016 |Update: Modified the impacted upper level fileset for 7.1.3 The most recent version of this document is available here: http://aix.software.ibm.com/aix/efixes/security/nettcp_advisory.asc https://aix.software.ibm.com/aix/efixes/security/nettcp_advisory.asc ftp://aix.software.ibm.com/aix/efixes/security/nettcp_advisory.asc Security Bulletin: Vulnerability in SSLv3 affects ftpd, sendmail, imapd, and popd on AIX (CVE-2014-3566) =============================================================================== SUMMARY: SSLv3 contains a vulnerability that has been referred to as the Padding Oracle On Downgraded Legacy Encryption (POODLE) attack. SSLv3 is enabled in ftpd, sendmail when using the sendmail_ssl binary, imapd, and popd on AIX. =============================================================================== VULNERABILITY DETAILS: CVEID: CVE-2014-3566 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3566 DESCRIPTION: Product could allow a remote attacker to obtain sensitive information, caused by a design error when using the SSLv3 protocol. A remote user with the ability to conduct a man-in-the-middle attack could exploit this vulnerability via a POODLE (Padding Oracle On Downgraded Legacy Encryption) attack to decrypt SSL sessions and access the plaintext of encrypted connections. CVSS: CVSS Base Score: 4.3 CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/97013 for the current score. CVSS Environmental Score*: Undefined CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N) AFFECTED PRODUCTS AND VERSIONS: AIX 6.1, 7.1 VIOS 2.2.x The following fileset levels are vulnerable: AIX Fileset Lower Level Upper Level KEY -------------------------------------------------------- bos.net.tcp.client 6.1.0.0 6.1.8.19 key_w_fs bos.net.tcp.client 6.1.0.0 6.1.9.48 key_w_fs bos.net.tcp.client 7.1.0.0 7.1.2.19 key_w_fs | bos.net.tcp.client 7.1.0.0 7.1.3.45 key_w_fs bos.net.tcp.server 6.1.0.0 6.1.8.18 key_w_fs bos.net.tcp.server 6.1.0.0 6.1.9.45 key_w_fs bos.net.tcp.server 7.1.0.0 7.1.2.18 key_w_fs bos.net.tcp.server 7.1.0.0 7.1.3.45 key_w_fs AIX Fileset (VIOS) Lower Level Upper Level ------------------------------------------------------------ bos.net.tcp.client 6.1.0.0(2.2.0.0) 6.1.8.19(2.2.2.6) bos.net.tcp.client 6.1.0.0(2.2.0.0) 6.1.9.48(2.2.3.50) bos.net.tcp.server 6.1.0.0(2.2.0.0) 6.1.8.18(2.2.2.6) bos.net.tcp.server 6.1.0.0(2.2.0.0) 6.1.9.45(2.2.3.50) Note: 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.net.tcp.client REMEDIATION: A. APARS IBM has assigned the following APARs to this problem: For ftpd: AIX Level APAR Availability SP KEY PRODUCT(S) ------------------------------------------------------------ 6.1.8 IV69768 9/30/15 SP7 key_w_apar ftpd 6.1.9 IV73324 12/04/15 SP6 key_w_apar ftpd 7.1.2 IV73319 9/30/15 SP7 key_w_apar ftpd 7.1.3 IV73316 2/26/16 SP6 key_w_apar ftpd Subscribe to the APARs here: http://www.ibm.com/support/docview.wss?uid=isg1IV69768 http://www.ibm.com/support/docview.wss?uid=isg1IV73324 http://www.ibm.com/support/docview.wss?uid=isg1IV73319 http://www.ibm.com/support/docview.wss?uid=isg1IV73316 For sendmail: Please note that these only apply to the SSL-enabled sendmail binary, /usr/sbin/sendmail_ssl. The default sendmail binary, /usr/sbin/sendmail, does not use SSL and is therefore not vulnerable to POODLE. AIX Level APAR Availability SP KEY PRODUCT(S) ------------------------------------------------------------ 6.1.8 IV73416 9/30/15 SP7 key_w_apar sendmail 6.1.9 IV73417 12/04/15 SP6 key_w_apar sendmail 7.1.2 IV73418 9/30/15 SP7 key_w_apar sendmail 7.1.3 IV73419 2/26/16 SP6 key_w_apar sendmail Subscribe to the APARs here: http://www.ibm.com/support/docview.wss?uid=isg1IV73416 http://www.ibm.com/support/docview.wss?uid=isg1IV73417 http://www.ibm.com/support/docview.wss?uid=isg1IV73418 http://www.ibm.com/support/docview.wss?uid=isg1IV73419 For imapd and popd: AIX Level APAR Availability SP KEY PRODUCT(S) ------------------------------------------------------------ 6.1.8 IV73973 9/30/15 SP7 key_w_apar imapd/popd 6.1.9 IV73976 12/04/15 SP6 key_w_apar imapd/popd 7.1.2 IV73974 9/30/15 SP7 key_w_apar imapd/popd 7.1.3 IV73975 2/26/16 SP6 key_w_apar imapd/popd Subscribe to the APARs here: http://www.ibm.com/support/docview.wss?uid=isg1IV73973 http://www.ibm.com/support/docview.wss?uid=isg1IV73976 http://www.ibm.com/support/docview.wss?uid=isg1IV73974 http://www.ibm.com/support/docview.wss?uid=isg1IV73975 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 or http from: ftp://aix.software.ibm.com/aix/efixes/security/nettcp_fix.tar http://aix.software.ibm.com/aix/efixes/security/nettcp_fix.tar https://aix.software.ibm.com/aix/efixes/security/nettcp_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. For ftpd: AIX Level Interim Fix (*.Z) KEY PRODUCT(S) ---------------------------------------------------------- 6.1.8.6 IV69768s6a.150515.epkg.Z key_w_fix ftpd 6.1.9.5 IV73324s5a.150515.epkg.Z key_w_fix ftpd 7.1.2.6 IV73319s6a.150515.epkg.Z key_w_fix ftpd 7.1.3.5 IV73316s5a.150515.epkg.Z key_w_fix ftpd VIOS Level Interim Fix (*.Z) KEY PRODUCT(S) ----------------------------------------------------------- 2.2.2.6 IV69768s6a.150515.epkg.Z key_w_fix ftpd 2.2.3.50 IV73324s5a.150515.epkg.Z key_w_fix ftpd For sendmail: Please note that these only apply to the SSL-enabled sendmail binary, /usr/sbin/sendmail_ssl. The default sendmail binary, /usr/sbin/sendmail, does not use SSL and is therefore not vulnerable to POODLE. AIX Level Interim Fix (*.Z) KEY PRODUCT(S) ---------------------------------------------------------- 6.1.8.6 IV73416s6a.150520.epkg.Z key_w_fix sendmail 6.1.9.5 IV73417s5a.150520.epkg.Z key_w_fix sendmail 7.1.2.6 IV73418s6a.150520.epkg.Z key_w_fix sendmail 7.1.3.5 IV73419s5a.150520.epkg.Z key_w_fix sendmail VIOS Level Interim Fix (*.Z) KEY PRODUCT(S) ----------------------------------------------------------- 2.2.2.6 IV73416s6a.150520.epkg.Z key_w_fix sendmail 2.2.3.50 IV73417s5a.150520.epkg.Z key_w_fix sendmail For imapd and popd: AIX Level Interim Fix (*.Z) KEY PRODUCT(S) ---------------------------------------------------------- 6.1.8.6 IV73973s6a.150609.epkg.Z key_w_fix imapd/popd 6.1.9.5 IV73976s5a.150609.epkg.Z key_w_fix imapd/popd 7.1.2.6 IV73974s6b.150610.epkg.Z key_w_fix imapd/popd 7.1.3.5 IV73975s5a.150619.epkg.Z key_w_fix imapd/popd VIOS Level Interim Fix (*.Z) KEY PRODUCT(S) ----------------------------------------------------------- 2.2.2.6 IV73973s6a.150609.epkg.Z key_w_fix imapd/popd 2.2.3.50 IV73976s5a.150609.epkg.Z key_w_fix imapd/popd To extract the fixes from the tar file: tar xvf nettcp_fix.tar cd nettcp_fix Verify you have retrieved the fixes intact: The checksums below were generated using the "openssl dgst -sha256 file" command as the followng: For ftpd: openssl dgst -sha256 filename KEY ----------------------------------------------------------------------------------------------------- e7abdef186219eb2b039cc19746a1914725b2018d6ff9558bd43df3fa18514fa IV69768s6a.150515.epkg.Z key_w_csum 9f608ce43a1d828d3414f9c02fc41358d0e9ae4dcbac4d7f549d7cc9b5a7afb4 IV73324s5a.150515.epkg.Z key_w_csum 89a73255f06eb6bffeb5884bfce3b1a3b97b1e4d477affb7b92c4c8a9196de75 IV73319s6a.150515.epkg.Z key_w_csum 4ad25780e666538604e490494d7c5b6c48b9ed71c72d9f54cecd749480851c59 IV73316s5a.150515.epkg.Z key_w_csum For sendmail: openssl dgst -sha256 filename KEY ----------------------------------------------------------------------------------------------------- 7083ce308673424836224cadf6e021df35bf461b66a262c2691c043748242ee9 IV73416s6a.150520.epkg.Z key_w_csum 638e54c7f0218f020370e261d4d4a68b355568dbf5119384c4a82c7d4b374832 IV73417s5a.150520.epkg.Z key_w_csum cd99a31c28acdc76d6a5c48b47c3c915cd7fd1c18b2cab1e356aed47fc7d2a97 IV73418s6a.150520.epkg.Z key_w_csum 21f0b58c4a5bebb91c7f531ec3f8a301ba45b991cf1bd27fd323926d28b269e9 IV73419s5a.150520.epkg.Z key_w_csum For imapd and popd: openssl dgst -sha256 filename KEY ----------------------------------------------------------------------------------------------------- 3e3e27c1b2b07b363423fba245047c6ddf2e94605d0d051e2d50b08bf74b2c23 IV73973s6a.150609.epkg.Z key_w_csum a4225da8f1fa4173e2a483dd656bdc2b5ac0fd8c68f4a1434eac05daeb1bdca9 IV73976s5a.150609.epkg.Z key_w_csum b2e11c499f66f09f3268626939b2037b3b6e949a2a80dc1f3551998a47d5815a IV73974s6b.150610.epkg.Z key_w_csum b2160ee3496e57cae7d66c480bd8c2b965e37b43564731fd799a335c00a7d11b IV73975s5a.150619.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 AIX Security at security-alert@austin.ibm.com and describe the discrepancy. openssl dgst -sha1 -verify -signature .sig openssl dgst -sha1 -verify -signature .sig Published advisory OpenSSL signature file location: http://aix.software.ibm.com/aix/efixes/security/nettcp_advisory.asc.sig https://aix.software.ibm.com/aix/efixes/security/nettcp_advisory.asc.sig ftp://aix.software.ibm.com/aix/efixes/security/nettcp_advisory.asc.sig C. FIX AND 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. 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: 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 Comments regarding the content of this announcement can be directed to: security-alert@austin.ibm.com To obtain the OpenSSL public key that can be used to verify the signed advisories and ifixes: Download the key from our web page: http://www.ibm.com/systems/resources/systems_p_os_aix_security_pubkey.txt To obtain the PGP public key that can be used to communicate securely with the AIX Security Team via security-alert@austin.ibm.com you can either: A. Download the key from our web page: http://www.ibm.com/systems/resources/systems_p_os_aix_security_pgppubkey.txt B. Download the key from a PGP Public Key Server. The key ID is: 0x28BFAA12 Please contact your local IBM AIX support center for any assistance. REFERENCES: Complete CVSS Guide: http://www.first.org/cvss/cvss-guide.html On-line Calculator V2: http://nvd.nist.gov/cvss.cfm?calculator&adv&version=2 ACKNOWLEDGEMENTS: None. CHANGE HISTORY: First Issued: Wed Jun 17 09:52:06 CDT 2015 Updated: Thu Jun 18 09:48:23 CDT 2015 Update: Corrected vulnerable 7.1.2 upper fileset levels Updated: Fri Jun 19 08:27:55 CDT 2015 Update: New iFix IV73975s5a filename and checksum. iFix rebuilt with a new, corrected description on install but is functionally the same. Updated: Fri Jun 26 15:52:00 CDT 2015 Update: Added clarification that the sendmail fixes only apply when using the SSL-enabled sendmail binary, /usr/sbin/sendmail_ssl Updated: Wed Nov 4 11:13:43 CST 2015 Update: Specified the VIOS fixes | Updated: Tue Mar 1 10:07:14 CST 2016 | Update: Modified the impacted upper level fileset for 7.1.3 =============================================================================== *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.