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Ubuntu 12.04 ESM USN-3775-2: Critical Linux Kernel Security Update

ubuntu
Calendar Grey October 1, 2018
Dist Ubuntu Esm H88
Significant improvements introduced in Fedora's linux-lts-f30 kernel aimed at resolving multiple security threats.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM

Details:

USN-3775-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04

LTS. This update provides the corresponding updates for the Linux

Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu

12.04 ESM.

It was discovered that the paravirtualization implementation in the Linux

kernel did not properly handle some indirect calls, reducing the

effectiveness of Spectre v2 mitigations for paravirtual guests. A local

attacker could use this to expose sensitive information. (CVE-2018-15594)

It was discovered that microprocessors utilizing speculative execution and

prediction of return addresses via Return Stack Buffer (RSB) may allow

unauthorized memory reads via sidechannel attacks. An attacker could use

this to expose sensitive information. (CVE-2018-15572)

It was discovered that an integer overflow vulnera...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update critical update information disclosure Ubuntu 12.04

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 ESM:
  linux-image-3.13.0-160-generic  3.13.0-160.210~precise1
  linux-image-3.13.0-160-generic-lpae  3.13.0-160.210~precise1
  linux-image-generic-lpae-lts-trusty  3.13.0.160.150
  linux-image-generic-lts-trusty  3.13.0.160.150

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-3775-2

https://ubuntu.com/security/notices/USN-3775-1

CVE-2018-14633, CVE-2018-14634, CVE-2018-15572, CVE-2018-15594,

CVE-2018-6554, CVE-2018-6555

Severity
critical
Lowest
Low
Medium
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Critical

October 01, 2018

Topics%20covered

Topics Covered

security advisory denial of service kernel update critical update information disclosure Ubuntu 12.04

Package Information

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