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 i | 7.4 |
| IBM i | 7.3 |
| IBM i | 7.2 |
| IBM i | 7.1 |
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
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References
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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
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Document Information
Modified date:
19 November 2020
UID
ibm16370719