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AUSCERT External Security Bulletin Redistribution
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
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2018-0732
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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
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.
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.
Customers with the products below, install FW920.30
1) IBM Power Systems E950(9040-MR9)
2) IBM Power Systems E980(9080-M9S)
Complete CVSS v3 Guide
On-line Calculator v3
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.
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.
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