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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0835 IBM Security Bulletin: This Power System update is being released to address CVE-2018-0732 14 March 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Power 9 Systems Publisher: IBM Operating System: Network Appliance Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-0732 Reference: ASB-2019.0060 ASB-2019.0019 ESB-2018.1870 ESB-2018.1758 Original Bulletin: http://www.ibm.com/support/docview.wss?uid=ibm10875264 - --------------------------BEGIN INCLUDED TEXT-------------------- This Power System update is being released to address CVE-2018-0732 Product: Power 9 Systems Software version: FW920 Operating system(s): Firmware Reference #: 0875264 Security Bulletin Summary POWER9: In response to a denial of service vulnerability on the OpenSSL, a new Power Systems firmware update is being released to address Common Vulnerabilities and Exposures issue number CVE-2018-0732. A malicious server can send a large prime value to a client during DH(E) TLS handshake causing the client to hang. This can disrupt the HMC communications for system management and partition operations. Vulnerability Details CVEID: CVE-2018-0732 DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by the sending of a very large prime value to the client by a malicious server during key agreement in a TLS handshake. By spending an unreasonably long period of time generating a key for this prime, a remote attacker could exploit this vulnerability to cause the client to hang. CVSS Base Score: 3.7 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/ 144658 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L) Affected Products and Versions Firmware release FW920 is affected. Remediation/Fixes Customers with the products below, install FW920.30 1) IBM Power Systems E950(9040-MR9) 2) IBM Power Systems E980(9080-M9S) Reference Complete CVSS v3 Guide On-line Calculator v3 Related Information IBM Secure Engineering Web Portal IBM Product Security Incident Response Blog *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. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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