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Ubuntu 14.04 LTS USN-3821-2 Critical: Linux Kernel Denial of Service

ubuntu
Calendar Grey November 14, 2018
Dist Ubuntu Esm H88
Ubuntu 14.04 LTS addressed numerous security flaws in the Linux kernel to prevent potential crashes and safeguard confidential information.
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-3821-1 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.

Wen Xu discovered that the ext4 filesystem implementation in the Linux

kernel did not properly ensure that xattr information remained in inode

bodies. An attacker could use this to construct a malicious ext4 image

that, when mounted, could cause a denial of service (system crash).

(CVE-2018-10880)

It was discovered that the alarmtimer implementation in the Linux kernel

contained an integer overflow vulnerability. A local attacker could use

this to cause a denial of service. (CVE-2018-13053)

Wen Xu discovered that the f2fs filesystem implementat...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel fix ubuntu system crash linux-lts-xenial linux-aws

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-4.4.0-1034-aws      4.4.0-1034.37
  linux-image-4.4.0-139-generic   4.4.0-139.165~14.04.1
  linux-image-4.4.0-139-generic-lpae  4.4.0-139.165~14.04.1
  linux-image-4.4.0-139-lowlatency  4.4.0-139.165~14.04.1
  linux-image-4.4.0-139-powerpc-e500mc  4.4.0-139.165~14.04.1
  linux-image-4.4.0-139-powerpc-smp  4.4.0-139.165~14.04.1
  linux-image-4.4.0-139-powerpc64-emb  4.4.0-139.165~14.04.1
  linux-image-4.4.0-139-powerpc64-smp  4.4.0-139.165~14.04.1
  linux-image-aws                 4.4.0.1034.34
  linux-image-generic-lpae-lts-xenial  4.4.0.139.119
  linux-image-generic-lts-xenial  4.4.0.139.119
  linux-image-lowlatency-lts-xenial  4.4.0.139.119
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.139.119
  linux-image-powerpc-smp-lts-xenial  4.4.0.139.119
  linux-image-powerpc64-emb-lts-xenial  4.4.0.139.119
  linux-image-powerpc64-smp-lts-xenial  4.4.0.139.119

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-3821-2

https://ubuntu.com/security/notices/USN-3821-1

CVE-2018-10880, CVE-2018-13053, CVE-2018-13096, CVE-2018-14609,

CVE-2018-14617, CVE-2018-17972, CVE-2018-18021

Severity
critical
Lowest
Low
Medium
High
Critical

November 14, 2018

Topics%20covered

Topics Covered

security advisory denial of service kernel fix ubuntu system crash linux-lts-xenial linux-aws

Package Information

https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1034.37
https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-139.165~14.04.1

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