USN-4005-1: Linux kernel vulnerabilities

USN-4005-1: Linux kernel vulnerabilities

linux, linux-aws, linux-gcp, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities

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

• Ubuntu 19.04

Summary

Several security issues were fixed in the Linux kernel.

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
• linux-snapdragon – Linux kernel for Snapdragon processors

Details

It was discovered that a null pointer dereference vulnerability existed in
the LSI Logic MegaRAID driver in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash). (CVE-2019-11810)

It was discovered that a race condition leading to a use-after-free existed
in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux
kernel. The RDS protocol is blacklisted by default in Ubuntu. If enabled, a
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2019-11815)

Update instructions

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

Ubuntu 19.04

linux-image-5.0.0-1007-aws – 5.0.0-1007.7

linux-image-5.0.0-1007-gcp – 5.0.0-1007.7

linux-image-5.0.0-1007-kvm – 5.0.0-1007.7

linux-image-5.0.0-1009-raspi2 – 5.0.0-1009.9

linux-image-5.0.0-1013-snapdragon – 5.0.0-1013.13

linux-image-5.0.0-16-generic – 5.0.0-16.17

linux-image-5.0.0-16-generic-lpae – 5.0.0-16.17

linux-image-5.0.0-16-lowlatency – 5.0.0-16.17

linux-image-aws – 5.0.0.1007.7

linux-image-gcp – 5.0.0.1007.7

linux-image-generic – 5.0.0.16.17

linux-image-generic-lpae – 5.0.0.16.17

linux-image-gke – 5.0.0.1007.7

linux-image-kvm – 5.0.0.1007.7

linux-image-lowlatency – 5.0.0.16.17

linux-image-raspi2 – 5.0.0.1009.6

linux-image-snapdragon – 5.0.0.1013.6

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.

References

• CVE-2019-11810
• CVE-2019-11815

Source: USN-4005-1: Linux kernel vulnerabilities