Security Bulletin
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 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. 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
Workarounds and Mitigations
none
Get Notified about Future Security Bulletins
References
Change History
10 July 2018 - Initial Version
*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.
Was this topic helpful?
Document Information
Modified date:
26 September 2018
UID
ibm10733108