8 May 2018
linux, linux-aws, linux-azure, linux-euclid, linux-gcp, linux-hwe, linux-kvm, linux-lts-xenial, linux-oem, linux-raspi2, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 17.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary
Several security issues were fixed in the Linux kernel.
Software Description
- linux - Linux kernel
- linux-raspi2 - Linux kernel for Raspberry Pi 2
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-azure - Linux kernel for Microsoft Azure Cloud systems
- linux-euclid - Linux kernel for Intel Euclid systems
- linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe - Linux hardware enablement (HWE) kernel
- linux-kvm - Linux kernel for cloud environments
- linux-oem - Linux kernel for OEM processors
- linux-snapdragon - Linux kernel for Snapdragon processors
- linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
Details
Nick Peterson discovered that the Linux kernel did not
properly handle debug exceptions following a MOV/POP to SS
instruction. A local attacker could use this to cause a denial
of service (system crash). This issue only affected the amd64
architecture. (CVE-2018-8897)
Andy Lutomirski discovered that the KVM subsystem of the Linux kernel
did not properly emulate the ICEBP instruction following a MOV/POP
to SS instruction. A local attacker in a KVM virtual machine could
use this to cause a denial of service (guest VM crash) or possibly
escalate privileges inside of the virtual machine. This issue only
affected the i386 and amd64 architectures. (CVE-2018-1087)
Andy Lutomirski discovered that the Linux kernel did not properly
perform error handling on virtualized debug registers. A local
attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2018-1000199)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 17.10
- linux-image-4.13.0-1019-raspi2 - 4.13.0-1019.20
- linux-image-4.13.0-41-generic - 4.13.0-41.46
- linux-image-4.13.0-41-generic-lpae - 4.13.0-41.46
- linux-image-4.13.0-41-lowlatency - 4.13.0-41.46
- linux-image-generic - 4.13.0.41.44
- linux-image-generic-lpae - 4.13.0.41.44
- linux-image-lowlatency - 4.13.0.41.44
- linux-image-raspi2 - 4.13.0.1019.17
- Ubuntu 16.04 LTS
- linux-image-4.13.0-1015-gcp - 4.13.0-1015.19
- linux-image-4.13.0-1016-azure - 4.13.0-1016.19
- linux-image-4.13.0-1026-oem - 4.13.0-1026.29
- linux-image-4.13.0-41-generic - 4.13.0-41.46~16.04.1
- linux-image-4.13.0-41-generic-lpae - 4.13.0-41.46~16.04.1
- linux-image-4.13.0-41-lowlatency - 4.13.0-41.46~16.04.1
- linux-image-4.4.0-1023-kvm - 4.4.0-1023.28
- linux-image-4.4.0-1057-aws - 4.4.0-1057.66
- linux-image-4.4.0-1089-raspi2 - 4.4.0-1089.97
- linux-image-4.4.0-1092-snapdragon - 4.4.0-1092.97
- linux-image-4.4.0-124-generic - 4.4.0-124.148
- linux-image-4.4.0-124-generic-lpae - 4.4.0-124.148
- linux-image-4.4.0-124-lowlatency - 4.4.0-124.148
- linux-image-4.4.0-124-powerpc-e500mc - 4.4.0-124.148
- linux-image-4.4.0-124-powerpc-smp - 4.4.0-124.148
- linux-image-4.4.0-124-powerpc64-emb - 4.4.0-124.148
- linux-image-4.4.0-124-powerpc64-smp - 4.4.0-124.148
- linux-image-4.4.0-9027-euclid - 4.4.0-9027.29
- linux-image-aws - 4.4.0.1057.59
- linux-image-azure - 4.13.0.1016.17
- linux-image-euclid - 4.4.0.9027.28
- linux-image-gcp - 4.13.0.1015.17
- linux-image-generic - 4.4.0.124.130
- linux-image-generic-hwe-16.04 - 4.13.0.41.60
- linux-image-generic-lpae - 4.4.0.124.130
- linux-image-generic-lpae-hwe-16.04 - 4.13.0.41.60
- linux-image-gke - 4.13.0.1015.17
- linux-image-kvm - 4.4.0.1023.22
- linux-image-lowlatency - 4.4.0.124.130
- linux-image-lowlatency-hwe-16.04 - 4.13.0.41.60
- linux-image-oem - 4.13.0.1026.30
- linux-image-powerpc-e500mc - 4.4.0.124.130
- linux-image-powerpc-smp - 4.4.0.124.130
- linux-image-powerpc64-emb - 4.4.0.124.130
- linux-image-powerpc64-smp - 4.4.0.124.130
- linux-image-raspi2 - 4.4.0.1089.89
- linux-image-snapdragon - 4.4.0.1092.84
- Ubuntu 14.04 LTS
- linux-image-3.13.0-147-generic - 3.13.0-147.196
- linux-image-3.13.0-147-generic-lpae - 3.13.0-147.196
- linux-image-3.13.0-147-lowlatency - 3.13.0-147.196
- linux-image-3.13.0-147-powerpc-e500 - 3.13.0-147.196
- linux-image-3.13.0-147-powerpc-e500mc - 3.13.0-147.196
- linux-image-3.13.0-147-powerpc-smp - 3.13.0-147.196
- linux-image-3.13.0-147-powerpc64-emb - 3.13.0-147.196
- linux-image-3.13.0-147-powerpc64-smp - 3.13.0-147.196
- linux-image-4.4.0-1019-aws - 4.4.0-1019.19
- linux-image-4.4.0-124-generic - 4.4.0-124.148~14.04.1
- linux-image-4.4.0-124-generic-lpae - 4.4.0-124.148~14.04.1
- linux-image-4.4.0-124-lowlatency - 4.4.0-124.148~14.04.1
- linux-image-4.4.0-124-powerpc-e500mc - 4.4.0-124.148~14.04.1
- linux-image-4.4.0-124-powerpc-smp - 4.4.0-124.148~14.04.1
- linux-image-4.4.0-124-powerpc64-emb - 4.4.0-124.148~14.04.1
- linux-image-4.4.0-124-powerpc64-smp - 4.4.0-124.148~14.04.1
- linux-image-aws - 4.4.0.1019.19
- linux-image-generic - 3.13.0.147.157
- linux-image-generic-lpae - 3.13.0.147.157
- linux-image-generic-lpae-lts-xenial - 4.4.0.124.104
- linux-image-generic-lts-xenial - 4.4.0.124.104
- linux-image-generic-pae - 3.13.0.147.157
- linux-image-lowlatency - 3.13.0.147.157
- linux-image-lowlatency-lts-xenial - 4.4.0.124.104
- linux-image-powerpc-e500 - 3.13.0.147.157
- linux-image-powerpc-e500mc - 3.13.0.147.157
- linux-image-powerpc-e500mc-lts-xenial - 4.4.0.124.104
- linux-image-powerpc-smp - 3.13.0.147.157
- linux-image-powerpc-smp-lts-xenial - 4.4.0.124.104
- linux-image-powerpc64-emb - 3.13.0.147.157
- linux-image-powerpc64-emb-lts-xenial - 4.4.0.124.104
- linux-image-powerpc64-smp - 3.13.0.147.157
- linux-image-powerpc64-smp-lts-xenial - 4.4.0.124.104
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
Vulmon