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Security Bulletin: Vulnerability CVE-2020-4788 in the IBM Power9 processor affects IBM i

Security Bulletin


Summary

The IBM Power9 processor is used on IBM i. IBM i has addressed the applicable CVE.

Vulnerability Details

CVEID:   CVE-2020-4788
DESCRIPTION:   IBM Power9 processors could allow a local user to obtain sensitive information from the data in the L1 cache under extenuating circumstances.
CVSS Base score: 5.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/189296 for the current score.
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

Affected Product(s)Version(s)
IBM i7.4
IBM i7.3
IBM i7.2
IBM i7.1

Remediation/Fixes

The issue can be fixed by applying PTFs to IBM i.  Releases 7.4 7.3, 7.2 and 7.1 of IBM i are supported and will be fixed. 

The IBM i PTF numbers are:
Release 7.4 – MF68089 and MF68090
Release 7.3 – MF68094 and MF68095
Release 7.2 – MF68096 and MF68097
Release 7.1 – MF67706

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Acknowledgement

Anthony Steinhauser of Google's Safeside Project

Change History

19 Nov 2020: Initial Publication

*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.

Document Location

Worldwide

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Document Information

Modified date:
19 November 2020

UID

ibm16370719