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Ubuntu 14.04 LTS USN-3910-2: Kernel Issues Lead To System Crash Risk

ubuntu
Calendar Grey March 15, 2019
Dist Ubuntu Esm H88
=========================================================================Ubuntu Security Notice USN-
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

USN-3910-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04

LTS. This update provides the corresponding updates for the Linux

Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu

14.04 LTS.

It was discovered that the f2fs filesystem implementation in the Linux

kernel did not handle the noflush_merge mount option correctly. An attacker

could use this to cause a denial of service (system crash).

(CVE-2017-18241)

It was discovered that the procfs filesystem did not properly handle

processes mapping some memory elements onto files. A local attacker could

use this to block utilities that examine the procfs filesystem to report

operating system state, such as ps(1). (CVE-2018-1120)

Hui Peng and Mathias Payer discovered that the Option U...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel ubuntu system crash aws

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-4.4.0-1039-aws      4.4.0-1039.42
  linux-image-4.4.0-143-generic   4.4.0-143.169~14.04.2
  linux-image-4.4.0-143-generic-lpae  4.4.0-143.169~14.04.2
  linux-image-4.4.0-143-lowlatency  4.4.0-143.169~14.04.2
  linux-image-4.4.0-143-powerpc-e500mc  4.4.0-143.169~14.04.2
  linux-image-4.4.0-143-powerpc-smp  4.4.0-143.169~14.04.2
  linux-image-4.4.0-143-powerpc64-emb  4.4.0-143.169~14.04.2
  linux-image-4.4.0-143-powerpc64-smp  4.4.0-143.169~14.04.2
  linux-image-aws                 4.4.0.1039.40
  linux-image-generic-lpae-lts-xenial  4.4.0.143.125
  linux-image-generic-lts-xenial  4.4.0.143.125
  linux-image-lowlatency-lts-xenial  4.4.0.143.125
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.143.125
  linux-image-powerpc-smp-lts-xenial  4.4.0.143.125
  linux-image-powerpc64-emb-lts-xenial  4.4.0.143.125
  linux-image-powerpc64-smp-lts-xenial  4.4.0.143.125
  linux-image-virtual-lts-xenial  4.4.0.143.125

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-3910-2

https://ubuntu.com/security/notices/USN-3910-1

CVE-2017-18241, CVE-2018-1120, CVE-2018-19985, CVE-2018-7740,

CVE-2019-6133

Severity
important
Lowest
Low
Medium
High
Critical

March 15, 2019

Topics%20covered

Topics Covered

security advisory denial of service kernel ubuntu system crash aws

Package Information

https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1039.42
https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-143.169~14.04.2

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