Security Bulletin: PowerKVM has released fixes in response to the vulnerabilities known as Foreshadow

Summary

PowerKVM is affected by vulnerabilities in the Linux kernel. IBM has now addressed these vulnerabilities. Note that, although the CVE descriptions do not reference POWER, POWER CPUs are afftected.

Vulnerability Details

CVEID: CVE-2018-3620 DESCRIPTION: Multiple Intel CPU’'s could allow a local attacker to obtain sensitive information, caused by a flaw in the CPU speculative branch instruction execution feature. By conducting targeted cache side-channel attacks and via a terminal page fault, an attacker could exploit this vulnerability to leak information residing in the L1 data cache and read data belonging to different security contexts. Note: This vulnerability is also known as the “L1 Terminal Fault (L1TF)” or “Foreshadow” attack.
CVSS Base Score: 7.1
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/148318&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N)

Affected Products and Versions

PowerKVM 3.1

Remediation/Fixes

Customers can update PowerKVM systems by using “yum update”.

Fix images are made available via Fix Central. See <https://ibm.biz/BdHggw&gt;. This issue is addressed starting with v3.1.0.2 update 12.

Refer to the following reference URLs for remediation and additional vulnerability details:
Source Bulletin: _<http://www.ibm.com/support/docview.wss?uid=isg3T1026853&gt;_

Workarounds and Mitigations

none