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Ubuntu 14.04 LTS USN-3265-2 Critical: Kernel Denial Of Service Fixes

ubuntu
Calendar Grey April 25, 2017
Dist Ubuntu Esm H88
Numerous vulnerabilities addressed in Ubuntu 14.04 LTS affecting both nearby and external risks. Please ensure your system is up to date.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

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

Details:

USN-3265-1 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 a use-after-free flaw existed in the filesystem

encryption subsystem in the Linux kernel. A local attacker could use this

to cause a denial of service (system crash). (CVE-2017-7374)

Andrey Konovalov discovered an out-of-bounds access in the IPv6 Generic

Routing Encapsulation (GRE) tunneling implementation in the Linux kernel.

An attacker could use this to possibly expose sensitive information.

(CVE-2017-5897)

Andrey Konovalov discovered that the IPv4 implementation in the Linux

kernel did not properly handle invalid IP options in some situations. An

attacker could use this to cause a denia...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel fix local attack ubuntu system crash

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-4.4.0-75-generic    4.4.0-75.96~14.04.1
  linux-image-4.4.0-75-generic-lpae  4.4.0-75.96~14.04.1
  linux-image-4.4.0-75-lowlatency  4.4.0-75.96~14.04.1
  linux-image-4.4.0-75-powerpc-e500mc  4.4.0-75.96~14.04.1
  linux-image-4.4.0-75-powerpc-smp  4.4.0-75.96~14.04.1
  linux-image-4.4.0-75-powerpc64-smp  4.4.0-75.96~14.04.1
  linux-image-generic-lpae-lts-xenial  4.4.0.75.62
  linux-image-generic-lts-xenial  4.4.0.75.62
  linux-image-lowlatency-lts-xenial  4.4.0.75.62
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.75.62
  linux-image-powerpc-smp-lts-xenial  4.4.0.75.62
  linux-image-powerpc64-smp-lts-xenial  4.4.0.75.62

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-3265-2

https://ubuntu.com/security/notices/USN-3265-1

CVE-2017-5669, CVE-2017-5897, CVE-2017-5970, CVE-2017-5986,

CVE-2017-6214, CVE-2017-6345, CVE-2017-6346, CVE-2017-6347,

CVE-2017-6348, CVE-2017-7374

Severity
critical
Lowest
Low
Medium
High
Critical

April 25, 2017

Topics%20covered

Topics Covered

security advisory denial of service kernel fix local attack ubuntu system crash

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-75.96~14.04.1

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