========================================================================== Ubuntu Security Notice USN-3641-1 May 08, 2018 linux, linux-aws, linux-azure, linux-euclid, linux-gcp, linux-hwe, linux-kvm, linux-lts-xenial, linux-oem, linux-raspi2, and 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 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-3641-1 CVE-2018-1000199, CVE-2018-1087, CVE-2018-8897 Package Information: https://launchpad.net/ubuntu/+source/linux/4.13.0-41.46 https://launchpad.net/ubuntu/+source/linux-raspi2/4.13.0-1019.20 https://launchpad.net/ubuntu/+source/linux/4.4.0-124.148 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1057.66 https://launchpad.net/ubuntu/+source/linux-azure/4.13.0-1016.19 https://launchpad.net/ubuntu/+source/linux-euclid/4.4.0-9027.29 https://launchpad.net/ubuntu/+source/linux-gcp/4.13.0-1015.19 https://launchpad.net/ubuntu/+source/linux-hwe/4.13.0-41.46~16.04.1 https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1023.28 https://launchpad.net/ubuntu/+source/linux-oem/4.13.0-1026.29 https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1089.97 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1092.97 https://launchpad.net/ubuntu/+source/linux/3.13.0-147.196 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1019.19 https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-124.148~14.04.1