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Ubuntu 14.04 LTS USN-3753-2 Critical: Kernel Denial of Service Threats

ubuntu
Calendar Grey August 24, 2018
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-3753-1 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 generic SCSI driver in the Linux kernel did not

properly enforce permissions on kernel memory access. A local attacker

could use this to expose sensitive information or possibly elevate

privileges. (CVE-2017-13168)

Wen Xu discovered that a use-after-free vulnerability existed in the ext4

filesystem implementation in the Linux kernel. An attacker could use this

to construct a malicious ext4 image that, when mounted, could cause a

denial of service (system crash) or possibly execute arbitrary code.

(CVE-2018-10876, CVE-2...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel issue ubuntu ext4 AWS

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-4.4.0-1028-aws      4.4.0-1028.31
  linux-image-4.4.0-134-generic   4.4.0-134.160~14.04.1
  linux-image-4.4.0-134-generic-lpae  4.4.0-134.160~14.04.1
  linux-image-4.4.0-134-lowlatency  4.4.0-134.160~14.04.1
  linux-image-4.4.0-134-powerpc-e500mc  4.4.0-134.160~14.04.1
  linux-image-4.4.0-134-powerpc-smp  4.4.0-134.160~14.04.1
  linux-image-4.4.0-134-powerpc64-emb  4.4.0-134.160~14.04.1
  linux-image-4.4.0-134-powerpc64-smp  4.4.0-134.160~14.04.1
  linux-image-aws                 4.4.0.1028.28
  linux-image-generic-lpae-lts-xenial  4.4.0.134.114
  linux-image-generic-lts-xenial  4.4.0.134.114
  linux-image-lowlatency-lts-xenial  4.4.0.134.114
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.134.114
  linux-image-powerpc-smp-lts-xenial  4.4.0.134.114
  linux-image-powerpc64-emb-lts-xenial  4.4.0.134.114
  linux-image-powerpc64-smp-lts-xenial  4.4.0.134.114

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-3753-2

https://ubuntu.com/security/notices/USN-3753-1

CVE-2017-13168, CVE-2018-10876, CVE-2018-10877, CVE-2018-10878,

CVE-2018-10879, CVE-2018-10881, CVE-2018-10882, CVE-2018-12233,

CVE-2018-13094, CVE-2018-13405, CVE-2018-13406

Severity
critical
Lowest
Low
Medium
High
Critical

August 24, 2018

Topics%20covered

Topics Covered

security advisory denial of service kernel issue ubuntu ext4 AWS

Package Information

https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1028.31
https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-134.160~14.04.1

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