IBM SECURITY ADVISORY First Issued: Tue Nov 26 14:32:29 CST 2019 The most recent version of this document is available here: http://aix.software.ibm.com/aix/efixes/security/openssl_advisory31.asc https://aix.software.ibm.com/aix/efixes/security/openssl_advisory31.asc ftp://aix.software.ibm.com/aix/efixes/security/openssl_advisory31.asc Security Bulletin: Vulnerabilities in OpenSSL affect AIX (CVE-2019-1547, CVE-2019-1563) =============================================================================== SUMMARY: There are vulnerabilities in OpenSSL used by AIX. =============================================================================== VULNERABILITY DETAILS: CVEID: CVE-2019-1547 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1547 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1547 DESCRIPTION: OpenSSL could allow a local authenticated attacker to obtain sensitive information, caused by the ability to construct an EC group missing the cofactor using explicit parameters instead of using a named curve. An attacker could exploit this vulnerability to obtain full key recovery during an ECDSA signature operation. CVSS Base Score: 5.5 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/167020 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) CVEID: CVE-2019-1563 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1563 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1563 DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive information, caused by a padding oracle attack in PKCS7_dataDecode and CMS_decrypt_set1_pkey. By sending an overly large number of messages to be decrypted, an attacker could exploit this vulnerability to obtain sensitive information. CVSS Base Score: 3.7 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/167022 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N) AFFECTED PRODUCTS AND VERSIONS: AIX 7.1, 7.2 VIOS 2.2, 3.1 The following fileset levels are vulnerable: key_fileset = osrcaix Fileset Lower Level Upper Level KEY ------------------------------------------------------ openssl.base 1.0.2.500 1.0.2.1801 key_w_fs openssl.base 20.13.102.1000 20.16.102.1801 key_w_fs Note: A. 0.9.8, 1.0.1 OpenSSL versions are out-of-support. Customers are advised to upgrade to currently supported OpenSSL 1.0.2 version. B. Latest level of OpenSSL fileset is available from the web download site: https://www-01.ibm.com/marketing/iwm/iwm/web/pickUrxNew.do?source=aixbp&S_PKG=openssl To find out whether the affected filesets are installed on your systems, refer to the lslpp command found in the AIX user's guide. Example: lslpp -L | grep -i openssl.base REMEDIATION: FIXES A fix is available, and it can be downloaded from: https://www-01.ibm.com/marketing/iwm/iwm/web/pickUrxNew.do?source=aixbp&S_PKG=openssl To extract the fixes from the tar file: For Openssl 1.0.2 version - zcat openssl-1.0.2.2000.tar.Z | tar xvf - For 1.0.2 FIPS capable openssl version - zcat openssl-20.16.102.2000.tar.Z | tar xvf - IMPORTANT: If possible, it is recommended that a mksysb backup of the system be created. Verify it is both bootable and readable before proceeding. Note that all the previously reported security vulnerability fixes are also included in above mentioned fileset level. Please refer to the readme file (provided along with the fileset) for the complete list of vulnerabilities fixed. To preview the fix installation: installp -apYd . openssl To install the fix package: installp -aXYd . openssl 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/openssl_advisory31.asc.sig https://aix.software.ibm.com/aix/efixes/security/openssl_advisory31.asc.sig ftp://aix.software.ibm.com/aix/efixes/security/openssl_advisory31.asc.sig 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 https://www.ibm.com/support/mynotifications To view previously issued advisories, please visit: http://www14.software.ibm.com/webapp/set2/subscriptions/onvdq https://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 https://www.first.org/cvss/user-guide On-line Calculator v3: http://www.first.org/cvss/calculator/3.0 https://www.first.org/cvss/calculator/3.0 RELATED INFORMATION: Security Bulletin: Vulnerabilities in OpenSSL affect AIX (CVE-2019-1547, CVE-2019-1563) https://www.ibm.com/support/pages/node/1116033 ACKNOWLEDGEMENTS: None. CHANGE HISTORY: First Issued: Tue Nov 26 14:32:29 CST 2019 =============================================================================== *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.