=========================================================================Ubuntu Security Notice USN-4096-1
August 13, 2019

linux-aws, linux-aws-hwe vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

The system could be made to expose sensitive information.

Software Description:
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems

Details:

Andrei Vlad Lutas and Dan Lutas discovered that some x86 processorsincorrectly handle SWAPGS instructions during speculative execution. A
local attacker could use this to expose sensitive information (kernel
memory).

Update instructions:

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

Ubuntu 19.04:
  linux-image-5.0.0-1012-aws      5.0.0-1012.13
  linux-image-aws                 5.0.0.1012.12

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1045-aws     4.15.0-1045.47
  linux-image-aws                 4.15.0.1045.44

Ubuntu 16.04 LTS:
  linux-image-4.15.0-1045-aws     4.15.0-1045.47~16.04.1
  linux-image-aws-hwe             4.15.0.1045.45

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-4096-1
  CVE-2019-1125

Package Information:
  https://launchpad.net/ubuntu/+source/linux-aws/5.0.0-1012.13
  https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1045.47
  https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1045.47~16.04.1

Ubuntu 4096-1: Linux kernel (AWS) vulnerability

August 13, 2019
The system could be made to expose sensitive information.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04: linux-image-5.0.0-1012-aws 5.0.0-1012.13 linux-image-aws 5.0.0.1012.12 Ubuntu 18.04 LTS: linux-image-4.15.0-1045-aws 4.15.0-1045.47 linux-image-aws 4.15.0.1045.44 Ubuntu 16.04 LTS: linux-image-4.15.0-1045-aws 4.15.0-1045.47~16.04.1 linux-image-aws-hwe 4.15.0.1045.45 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-4096-1

CVE-2019-1125

Severity
August 13, 2019

Package Information

https://launchpad.net/ubuntu/+source/linux-aws/5.0.0-1012.13 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1045.47 https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1045.47~16.04.1

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