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Ubuntu Security Notice USN-3443-3

Ubuntu Security Notice USN-3443-3
Posted Oct 11, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3443-3 - Andrey Konovalov discovered that a divide-by-zero error existed in the TCP stack implementation in the Linux kernel. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2017-14106
MD5 | cf13fc16151a8ca7752a3f37d942f30b

Ubuntu Security Notice USN-3443-3

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3443-3
October 11, 2017

linux-gcp vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

The system could be made to crash under certain conditions.

Software Description:
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

Details:

Andrey Konovalov discovered that a divide-by-zero error existed in the TCP
stack implementation in the Linux kernel. A local attacker could use this
to cause a denial of service (system crash). (CVE-2017-14106)

Update instructions:

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

Ubuntu 16.04 LTS:
linux-image-4.10.0-1007-gcp 4.10.0-1007.7
linux-image-gcp 4.10.0.1007.9

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://www.ubuntu.com/usn/usn-3443-3
https://www.ubuntu.com/usn/usn-3443-1
CVE-2017-14106

Package Information:
https://launchpad.net/ubuntu/+source/linux-gcp/4.10.0-1007.7

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