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Ubuntu Security Notice USN-3762-1

Ubuntu Security Notice USN-3762-1
Posted Sep 11, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3762-1 - It was discovered that the VirtIO subsystem in the Linux kernel did not properly initialize memory in some situations. A local attacker could use this to possibly expose sensitive information. Seunghun Han discovered an information leak in the ACPI handling code in the Linux kernel when handling early termination of ACPI table loading. A local attacker could use this to expose sensitive informal. Various other issues were also addressed.

tags | advisory, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-13695, CVE-2018-1118
SHA-256 | e9c161e0f73509d01d47ed89b3f97e88172195fd7fd7ba9faed0403af86c007e

Ubuntu Security Notice USN-3762-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-3762-1
September 11, 2018

linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-raspi2
vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

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-azure: Linux kernel for Microsoft Azure Cloud 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:

It was discovered that the VirtIO subsystem in the Linux kernel did not
properly initialize memory in some situations. A local attacker could use
this to possibly expose sensitive information (kernel memory).
(CVE-2018-1118)

Seunghun Han discovered an information leak in the ACPI handling code in
the Linux kernel when handling early termination of ACPI table loading. A
local attacker could use this to expose sensitive informal (kernel address
locations). (CVE-2017-13695)

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-4.15.0-1019-gcp 4.15.0-1019.20
linux-image-4.15.0-1021-aws 4.15.0-1021.21
linux-image-4.15.0-1021-kvm 4.15.0-1021.21
linux-image-4.15.0-1022-raspi2 4.15.0-1022.24
linux-image-4.15.0-1023-azure 4.15.0-1023.24
linux-image-4.15.0-34-generic 4.15.0-34.37
linux-image-4.15.0-34-generic-lpae 4.15.0-34.37
linux-image-4.15.0-34-lowlatency 4.15.0-34.37
linux-image-4.15.0-34-snapdragon 4.15.0-34.37
linux-image-aws 4.15.0.1021.21
linux-image-azure 4.15.0.1023.23
linux-image-azure-edge 4.15.0.1023.23
linux-image-gcp 4.15.0.1019.21
linux-image-generic 4.15.0.34.36
linux-image-generic-lpae 4.15.0.34.36
linux-image-gke 4.15.0.1019.21
linux-image-kvm 4.15.0.1021.21
linux-image-lowlatency 4.15.0.34.36
linux-image-raspi2 4.15.0.1022.20
linux-image-snapdragon 4.15.0.34.36

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-3762-1
CVE-2017-13695, CVE-2018-1118

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-34.37
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1021.21
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1023.24
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1019.20
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1021.21
https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1022.24
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