AIX is vulnerable to an SSL server spoof due to Apache Commons HttpClient


IBM SECURITY ADVISORY First Issued: Thu Apr 13 13:44:57 CDT 2023 The most recent version of this document is available here: https://aix.software.ibm.com/aix/efixes/security/commonshttp_advisory.asc Security Bulletin: AIX is vulnerable to an SSL server spoof due to Apache Commons HttpClient (CVE-2012-5783) =============================================================================== SUMMARY: A vulnerability in Apache Commons HttpClient could allow a remote attacker to conduct spoofing attacks (CVE-2012-5783). AIX ships Apache Commons HttpClient as part of Electronic Customer Care. =============================================================================== VULNERABILITY DETAILS: CVEID: CVE-2012-5783 https://vulners.com/cve/CVE-2012-5783 https://vulners.com/cve/CVE-2012-5783 DESCRIPTION: Apache Commons HttpClient, as used in Amazon Flexible Payments Service (FPS) merchant Java SDK and other products, could allow a remote attacker to conduct spoofing attacks, caused by the failure to verify that the server hostname matches a domain name in the subject's Common Name (CN) field of the X.509 certificate. By persuading a victim to visit a Web site containing a specially-crafted certificate, an attacker could exploit this vulnerability using man-in-the-middle techniques to spoof an SSL server. CVSS Base Score: 4.3 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/79984 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N) AFFECTED PRODUCTS AND VERSIONS: AIX 7.1, 7.2, 7.3 VIOS 3.1 The following fileset levels are vulnerable: key_fileset = aix Fileset Lower Level Upper Level KEY ---------------------------------------------------------- bos.ecc_client.rte key_w_fs bos.ecc_client.rte key_w_fs bos.ecc_client.rte key_w_fs bos.ecc_client.rte key_w_fs bos.ecc_client.rte key_w_fs bos.ecc_client.rte 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.ecc_client.rte REMEDIATION: A. APARS IBM has assigned the following APARs to this problem: AIX Level APAR Availability SP KEY ----------------------------------------------------- 7.1.5 IJ45221 ** SP12 key_w_apar 7.2.5 IJ44994 ** SP06 key_w_apar 7.3.0 IJ45224 ** SP04 key_w_apar 7.3.1 IJ44987 ** SP02 key_w_apar VIOS Level APAR Availability SP KEY ----------------------------------------------------- 3.1.2 IJ45222 ** key_w_apar 3.1.3 IJ45223 ** key_w_apar 3.1.4 IJ44994 ** key_w_apar Subscribe to the APARs here: https://www.ibm.com/support/pages/apar/IJ44987 https://www.ibm.com/support/pages/apar/IJ44994 https://www.ibm.com/support/pages/apar/IJ45221 https://www.ibm.com/support/pages/apar/IJ45222 https://www.ibm.com/support/pages/apar/IJ45223 https://www.ibm.com/support/pages/apar/IJ45224 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 IBM strongly recommends addressing the vulnerability now. AIX and VIOS fixes are available. The AIX and VIOS fixes can be downloaded via https from: https://aix.software.ibm.com/aix/efixes/security/commonshttp_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 ---------------------------------------------- IJ45221sAa.230309.epkg.Z key_w_fix IJ45221sAa.230309.epkg.Z key_w_fix IJ45221sAa.230309.epkg.Z key_w_fix IJ44994s4a.230412.epkg.Z key_w_fix IJ44994s4a.230412.epkg.Z key_w_fix IJ44994s5a.230307.epkg.Z key_w_fix IJ45224s2a.230309.epkg.Z key_w_fix IJ45224s2a.230309.epkg.Z key_w_fix IJ45224s2a.230309.epkg.Z key_w_fix IJ44987s1a.230307.epkg.Z key_w_fix Please note that the above table refers to AIX TL/SP level as opposed to fileset level, i.e., is AIX 7200-05-04. Please reference the Affected Products and Version section above for help with checking installed fileset levels. VIOS Level Interim Fix (*.Z) KEY ----------------------------------------------- IJ45222s2a.230307.epkg.Z key_w_fix IJ45222s2a.230307.epkg.Z key_w_fix IJ45222s2a.230307.epkg.Z key_w_fix IJ45223s4a.230307.epkg.Z key_w_fix IJ45223s4a.230307.epkg.Z key_w_fix IJ45223s4a.230307.epkg.Z key_w_fix IJ44994s5a.230307.epkg.Z key_w_fix To extract the fixes from the tar file: tar xvf commonshttp_fix.tar cd commonshttp_fix 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 ----------------------------------------------------------------------------------------------------- 7b5296488a406617aacbc387f31565336610821e26ac9599657e246efae62f49 IJ44987s1a.230307.epkg.Z key_w_csum a79ff0361f4fc5ea68cbde506b90abbfcd9d51e074694571a6bb8b5dde9746cb IJ44994s4a.230412.epkg.Z key_w_csum 9f3f5a390468baa29e0df79db1e40d6e82828b50ca9b2af15e47375a6050b0d3 IJ44994s5a.230307.epkg.Z key_w_csum c01b7def86330e4dda232872a0fb795a8fc80d7076ed04d2e0c80b0547049d3d IJ45221sAa.230309.epkg.Z key_w_csum 73c1fa8a984a7bd9a5928e56052262082339db4264842e95a09cc61936e51285 IJ45222s2a.230307.epkg.Z key_w_csum c5050bfb62f5c789fb58214d7b99decd4ad764d88140f419618629599856e1f0 IJ45223s4a.230307.epkg.Z key_w_csum e0b17e7ef7b17349247f3e7336c64b337d6940819791f459a95e29fc90676269 IJ45224s2a.230309.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 -sha256 -verify [pubkey_file] -signature [advisory_file].sig [advisory_file] openssl dgst -sha256 -verify [pubkey_file] -signature [ifix_file].sig [ifix_file] Published advisory OpenSSL signature file location: https://aix.software.ibm.com/aix/efixes/security/commonshttp_advisory.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": https://www.ibm.com/support/mynotifications To view previously issued advisories, please visit: https://www14.software.ibm.com/webapp/set2/subscriptions/onvdq Contact IBM Support for questions related to this announcement: 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: https://www.first.org/cvss/calculator/3.0 RELATED INFORMATION: IBM Secure Engineering Web Portal https://www.ibm.com/security/secure-engineering/bulletins.html IBM Product Security Incident Response Blog https://www.ibm.com/blogs/psirt/ Security Bulletin: AIX is vulnerable to an SSL server spoof due to Apache Commons HttpClient (CVE-2012-5783) https://www.ibm.com/support/pages/node/6983589 ACKNOWLEDGEMENTS: None. CHANGE HISTORY: First Issued: Thu Apr 13 13:44:57 CDT 2023 =============================================================================== *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.