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Ubuntu 16.04 LTS USN-3220-3 Critical: linux-aws Denial Of Service

ubuntu
Calendar Grey March 9, 2017
Dist Ubuntu Esm H88
Addressing the security flaw in the Ubuntu 16.04 LTS linux-aws package to mitigate system crashes and avert unauthorized administrator access.
The system could be made to crash or run programs as an administrator.

Summary

The system could be made to crash or run programs as an administrator.

Software Description:

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

Details:

USN-3220-1 fixed a vulnerability in the Linux kernel. This update

provides the corresponding updates for the Linux kernel for Amazon

Web Services (AWS).

Alexander Popov discovered that the N_HDLC line discipline implementation

in the Linux kernel contained a double-free vulnerability. A local attacker

could use this to cause a denial of service (system crash) or possibly gain

administrative privileges.

Topics%20covered

Topics Covered

security advisory denial of service system update ubuntu administrative access linux kernel aws

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1007-aws      4.4.0-1007.16
  linux-image-aws                 4.4.0.1007.8

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-3220-3

https://ubuntu.com/security/notices/USN-3220-1

CVE-2017-2636

Severity
critical
Lowest
Low
Medium
High
Critical

March 09, 2017

Topics%20covered

Topics Covered

security advisory denial of service system update ubuntu administrative access linux kernel aws

Package Information

https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1007.16

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