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AUSCERT External Security Bulletin Redistribution
ESB-2018.2711
Linux kernel vulnerabilities
12 September 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: linux kernel
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Access Privileged Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-1118 CVE-2017-13695
Reference: ESB-2018.2335
ESB-2018.2097
Original Bulletin:
http://www.ubuntu.com/usn/usn-3762-1
http://www.ubuntu.com/usn/usn-3762-2
Comment: This bulletin contains two (2) Ubuntu security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
==========================================================================
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
- --------------------------------------------------------------------------------
==========================================================================
Ubuntu Security Notice USN-3762-2
September 11, 2018
linux-hwe, linux-azure, linux-gcp vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- - linux-azure: Linux kernel for Microsoft Azure Cloud systems
- - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- - linux-hwe: Linux hardware enablement (HWE) kernel
Details:
USN-3762-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu
16.04 LTS.
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 16.04 LTS:
linux-image-4.15.0-1019-gcp 4.15.0-1019.20~16.04.1
linux-image-4.15.0-1023-azure 4.15.0-1023.24~16.04.1
linux-image-4.15.0-34-generic 4.15.0-34.37~16.04.1
linux-image-4.15.0-34-generic-lpae 4.15.0-34.37~16.04.1
linux-image-4.15.0-34-lowlatency 4.15.0-34.37~16.04.1
linux-image-azure 4.15.0.1023.29
linux-image-gcp 4.15.0.1019.33
linux-image-generic-hwe-16.04 4.15.0.34.56
linux-image-generic-lpae-hwe-16.04 4.15.0.34.56
linux-image-gke 4.15.0.1019.33
linux-image-lowlatency-hwe-16.04 4.15.0.34.56
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-3762-2
https://usn.ubuntu.com/usn/usn-3762-1
CVE-2017-13695, CVE-2018-1118
Package Information:
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1023.24~16.04.1
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1019.20~16.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-34.37~16.04.1
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