USN-3819-1: Linux kernel vulnerability
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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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.
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