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Ubuntu Security Notice USN-3819-1

Ubuntu Security Notice USN-3819-1
Posted Nov 15, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3819-1 - Felix Wilhelm discovered that the Xen netback driver in the Linux kernel did not properly perform input validation in some situations. An attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2018-15471
SHA-256 | bcf564aa62d3ac4b93ddf052ffaa8f0b083bbffadf362edb33538b52ea5a5474

Ubuntu Security Notice USN-3819-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3819-1
November 14, 2018

linux, linux-aws, linux-gcp, linux-kvm, linux-raspi2 vulnerability
==========================================================================

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

- Ubuntu 18.10

Summary:

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

Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

Felix Wilhelm discovered that the Xen netback driver in the Linux kernel
did not properly perform input validation in some situations. An attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code.

Update instructions:

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

Ubuntu 18.10:
linux-image-4.18.0-1003-gcp 4.18.0-1003.4
linux-image-4.18.0-1004-aws 4.18.0-1004.5
linux-image-4.18.0-1004-kvm 4.18.0-1004.4
linux-image-4.18.0-1006-raspi2 4.18.0-1006.8
linux-image-4.18.0-11-generic 4.18.0-11.12
linux-image-4.18.0-11-generic-lpae 4.18.0-11.12
linux-image-4.18.0-11-lowlatency 4.18.0-11.12
linux-image-4.18.0-11-snapdragon 4.18.0-11.12
linux-image-aws 4.18.0.1004.4
linux-image-gcp 4.18.0.1003.3
linux-image-generic 4.18.0.11.12
linux-image-generic-lpae 4.18.0.11.12
linux-image-gke 4.18.0.1003.3
linux-image-kvm 4.18.0.1004.4
linux-image-lowlatency 4.18.0.11.12
linux-image-raspi2 4.18.0.1006.3
linux-image-snapdragon 4.18.0.11.12

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://usn.ubuntu.com/usn/usn-3819-1
CVE-2018-15471

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.18.0-11.12
https://launchpad.net/ubuntu/+source/linux-aws/4.18.0-1004.5
https://launchpad.net/ubuntu/+source/linux-gcp/4.18.0-1003.4
https://launchpad.net/ubuntu/+source/linux-kvm/4.18.0-1004.4
https://launchpad.net/ubuntu/+source/linux-raspi2/4.18.0-1006.8

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