Rapid7 Vulnerability & Exploit Database

SUSE: CVE-2019-19338: SUSE Linux Security Advisory

Back to Search

SUSE: CVE-2019-19338: SUSE Linux Security Advisory

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
12/17/2019
Created
12/28/2019
Added
12/18/2019
Modified
02/08/2021

Description

A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where, the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that host has 'TSX' enabled. Confidentiality of data is the highest threat associated with this vulnerability.

Solution(s)

  • suse-upgrade-kernel-default
  • suse-upgrade-kernel-docs
  • suse-upgrade-kernel-obs-build

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;