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Ubuntu 14.04 ESM USN-4286-2: Critical Kernel Memory Exhaustion Issues

ubuntu
Calendar Grey February 18, 2020
Dist Ubuntu Esm H88
Critical updates for Ubuntu 14.04 ESM addressing various kernel memory exhaustion issues.
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-4286-1 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 ESM.

It was discovered that the Linux kernel did not properly clear data

structures on context switches for certain Intel graphics processors. A

local attacker could use this to expose sensitive information.

(CVE-2019-14615)

It was discovered that a race condition existed in the Softmac USB Prism54

device driver in the Linux kernel. A physically proximate attacker could

use this to cause a denial of service (system crash). (CVE-2019-15220)

Julien Grall discovered that the Xen balloon memory driver in the Linux

kernel did not properly restrict the am...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service ubuntu memory exhaustion linux kernel aws xenial

Update Instructions

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

Ubuntu 14.04 ESM:
  linux-image-4.4.0-1062-aws      4.4.0-1062.66
  linux-image-4.4.0-174-generic   4.4.0-174.204~14.04.1
  linux-image-4.4.0-174-generic-lpae  4.4.0-174.204~14.04.1
  linux-image-4.4.0-174-lowlatency  4.4.0-174.204~14.04.1
  linux-image-4.4.0-174-powerpc-e500mc  4.4.0-174.204~14.04.1
  linux-image-4.4.0-174-powerpc-smp  4.4.0-174.204~14.04.1
  linux-image-4.4.0-174-powerpc64-emb  4.4.0-174.204~14.04.1
  linux-image-4.4.0-174-powerpc64-smp  4.4.0-174.204~14.04.1
  linux-image-aws                 4.4.0.1062.63
  linux-image-generic-lpae-lts-xenial  4.4.0.174.153
  linux-image-generic-lts-xenial  4.4.0.174.153
  linux-image-lowlatency-lts-xenial  4.4.0.174.153
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.174.153
  linux-image-powerpc-smp-lts-xenial  4.4.0.174.153
  linux-image-powerpc64-emb-lts-xenial  4.4.0.174.153
  linux-image-powerpc64-smp-lts-xenial  4.4.0.174.153
  linux-image-virtual-lts-xenial  4.4.0.174.153

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-4286-2

https://ubuntu.com/security/notices/USN-4286-1

CVE-2019-14615, CVE-2019-15217, CVE-2019-15220, CVE-2019-15221,

CVE-2019-17351, CVE-2019-19051, CVE-2019-19056, CVE-2019-19066,

CVE-2019-19068, CVE-2019-19965, CVE-2019-20096, CVE-2019-5108

Severity
critical
Lowest
Low
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Critical

February 18, 2020

Topics%20covered

Topics Covered

security advisory denial of service ubuntu memory exhaustion linux kernel aws xenial

Package Information

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