Rapid7 Vulnerability & Exploit Database

Ubuntu: USN-3522-4: Linux kernel (Xenial HWE) regression

Back to Search

Ubuntu: USN-3522-4: Linux kernel (Xenial HWE) regression

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
01/10/2018
Created
07/25/2018
Added
01/11/2018
Modified
07/09/2020

Description

USN-3522-2 fixed a vulnerability in the Linux Hardware Enablement kernel for Ubuntu 14.04 LTS to address Meltdown (CVE-2017-5754). Unfortunately, that update introduced a regression where a few systems failed to boot successfully. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Jann Horn discovered that microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Meltdown. A local attacker could use this to expose sensitive information, including kernel memory.

Solution(s)

  • ubuntu-upgrade-linux-image-4-4-0-109-generic
  • ubuntu-upgrade-linux-image-4-4-0-109-lowlatency
  • ubuntu-upgrade-linux-image-generic-lts-xenial
  • ubuntu-upgrade-linux-image-lowlatency-lts-xenial

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

;