IBM SECURITY ADVISORY First Issued: Fri Dec 14 12:09:04 CST 2018 The most recent version of this document is available here: http://aix.software.ibm.com/aix/efixes/security/itds_advisory2.asc https://aix.software.ibm.com/aix/efixes/security/itds_advisory2.asc ftp://aix.software.ibm.com/aix/efixes/security/itds_advisory2.asc Security Bulletin: Vulnerabilities in GSKit affect IBM Tivoli Directory Server and IBM Security Directory Server for AIX =============================================================================== SUMMARY: There are multiple vulnerabilities in GSKit that affect IBM Tivoli Directory Server and IBM Security Directory Server for AIX. =============================================================================== VULNERABILITY DETAILS: CVEID: CVE-2018-1388 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1388 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1388 DESCRIPTION: GSKit V7 may disclose side channel information via discrepencies between valid and invalid PKCS#1 padding. CVSS Base Score: 9.1 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/138212 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N) CVEID: CVE-2018-1427 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1427 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1427 DESCRIPTION: IBM GSKit contains several enviornment variables that a local attacker could overflow and cause a denial of service. CVSS Base Score: 6.2 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/139072 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) CVEID: CVE-2018-1426 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1426 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1426 DESCRIPTION: IBM GSKit duplicates the PRNG state across fork() system calls when multiple ICC instances are loaded which could result in duplicate Session IDs and a risk of duplicate key material. CVSS Base Score: 7.4 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/139071 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N) CVEID: CVE-2016-0702 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0702 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0702 DESCRIPTION: OpenSSL could allow a local attacker to obtain sensitive information, caused by a side-channel attack against a system based on the Intel Sandy-Bridge microarchitecture. An attacker could exploit this vulnerability to recover RSA keys. CVSS Base Score: 2.9 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/111144 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N) CVEID: CVE-2018-1447 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1447 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1447 DESCRIPTION: The GSKit CMS KDB logic fails to salt the hash function resulting in weaker than expected protection of passwords. A weak password may be recovered. Note: After update the customer should change password to ensure the new password is stored more securely. Products should encourage customers to take this step as a high priority action. CVSS Base Score: 5.1 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/139972 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N) AFFECTED PRODUCTS AND VERSIONS: AIX 5.3, 6.1, 7.1, 7.2 VIOS 2.2.x The following fileset levels (VRMF) are vulnerable, if the respective IBM Tivoli Directory Server (ITDS) or IBM Security Directory Server (ISDS) version is installed: For ITDS 6.2.0: Less than 6.2.0.56 For ITDS 6.3.0: Less than 6.3.0.49 For ISDS 6.3.1: Less than 6.3.1.24 For ISDS 6.4.0: Less than 6.4.0.16 Note: To find out whether the affected ITDS or ISDS filesets are installed on your systems, refer to the lslpp command found in AIX user's guide. Example: lslpp -L | grep -i itds REMEDIATION: Note: Recommended remediation is to always install the most recent package available for the respective IBM Tivoli Directory Server or IBM Security Directory Server version. IBM Tivoli Directory Server 6.2.0, 6.2.0.56 or later: https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Security%2BSystems&product=ibm/Tivoli/Tivoli+Directory+Server&release=6.2.0.52&platform=AIX&function=all IBM Tivoli Directory Server 6.3.0, 6.3.0.49 or later: https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Security%2BSystems&product=ibm/Tivoli/Tivoli+Directory+Server&release=6.3.0.45&platform=AIX&function=all IBM Security Directory Server 6.3.1, 6.3.1.24 or later: https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Security%2BSystems&product=ibm/Tivoli/IBM+Security+Directory+Server&release=6.3.1.20&platform=AIX&function=all IBM Security Directory Server 6.4.0, 6.4.0.16 or later: https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Security%2BSystems&product=ibm/Tivoli/IBM+Security+Directory+Server&release=6.4.0.11&platform=AIX&function=all 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 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: http://www.ibm.com/systems/resources/systems_p_os_aix_security_pubkey.txt Please contact your local IBM AIX support center for any assistance. REFERENCES: Complete CVSS v2 Guide: http://www.first.org/cvss/v2/guide On-line Calculator v2: http://nvd.nist.gov/CVSS-v2-Calculator 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: Security Bulletin: Vulnerabilities in GSKit affect IBM Tivoli Directory Server and IBM Security Directory Server for AIX http://www-01.ibm.com/support/docview.wss?uid=ibm10788069 ACKNOWLEDGEMENTS: None. CHANGE HISTORY: First Issued: Fri Dec 14 12:09:04 CST 2018 =============================================================================== *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.