========================================================================== Ubuntu Security Notice USN-4041-1 June 29, 2019 linux, linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon update ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 19.04 - Ubuntu 18.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 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 - linux-snapdragon: Linux kernel for Snapdragon processors - linux-gke-4.15: Linux kernel for Google Container Engine (GKE) systems - linux-hwe: Linux hardware enablement (HWE) kernel - linux-oem: Linux kernel for OEM processors - linux-oracle: Linux kernel for Oracle Cloud systems - linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems Details: USN-4017-1 fixed vulnerabilities in the Linux kernel for Ubuntu. Unfortunately, the update introduced a regression that interfered with networking applications that setup very low SO_SNDBUF values. This update fixes the problem. We apologize for the inconvenience. Jonathan Looney discovered that the Linux kernel could be coerced into segmenting responses into multiple TCP segments. A remote attacker could construct an ongoing sequence of requests to cause a denial of service. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04: linux-image-5.0.0-1010-aws 5.0.0-1010.11 linux-image-5.0.0-1010-azure 5.0.0-1010.10 linux-image-5.0.0-1010-gcp 5.0.0-1010.10 linux-image-5.0.0-1010-kvm 5.0.0-1010.11 linux-image-5.0.0-1012-raspi2 5.0.0-1012.12 linux-image-5.0.0-1016-snapdragon 5.0.0-1016.17 linux-image-5.0.0-20-generic 5.0.0-20.21 linux-image-5.0.0-20-generic-lpae 5.0.0-20.21 linux-image-5.0.0-20-lowlatency 5.0.0-20.21 linux-image-aws 5.0.0.1010.10 linux-image-azure 5.0.0.1010.9 linux-image-gcp 5.0.0.1010.10 linux-image-generic 5.0.0.20.21 linux-image-generic-lpae 5.0.0.20.21 linux-image-gke 5.0.0.1010.10 linux-image-kvm 5.0.0.1010.10 linux-image-lowlatency 5.0.0.20.21 linux-image-raspi2 5.0.0.1012.9 linux-image-snapdragon 5.0.0.1016.9 linux-image-virtual 5.0.0.20.21 Ubuntu 18.10: linux-image-4.18.0-1015-gcp 4.18.0-1015.16 linux-image-4.18.0-1016-kvm 4.18.0-1016.17 linux-image-4.18.0-1018-raspi2 4.18.0-1018.21 linux-image-4.18.0-1020-aws 4.18.0-1020.24 linux-image-4.18.0-1023-azure 4.18.0-1023.24 linux-image-4.18.0-25-generic 4.18.0-25.26 linux-image-4.18.0-25-generic-lpae 4.18.0-25.26 linux-image-4.18.0-25-lowlatency 4.18.0-25.26 linux-image-4.18.0-25-snapdragon 4.18.0-25.26 linux-image-aws 4.18.0.1020.20 linux-image-azure 4.18.0.1023.25 linux-image-gcp 4.18.0.1015.15 linux-image-generic 4.18.0.25.26 linux-image-generic-lpae 4.18.0.25.26 linux-image-gke 4.18.0.1015.15 linux-image-kvm 4.18.0.1016.16 linux-image-lowlatency 4.18.0.25.26 linux-image-powerpc-e500mc 4.18.0.25.26 linux-image-powerpc-smp 4.18.0.25.26 linux-image-powerpc64-emb 4.18.0.25.26 linux-image-powerpc64-smp 4.18.0.25.26 linux-image-raspi2 4.18.0.1018.15 linux-image-snapdragon 4.18.0.25.26 linux-image-virtual 4.18.0.25.26 Ubuntu 18.04 LTS: linux-image-4.15.0-1017-oracle 4.15.0-1017.19 linux-image-4.15.0-1036-gcp 4.15.0-1036.38 linux-image-4.15.0-1036-gke 4.15.0-1036.38 linux-image-4.15.0-1038-kvm 4.15.0-1038.38 linux-image-4.15.0-1040-raspi2 4.15.0-1040.43 linux-image-4.15.0-1043-aws 4.15.0-1043.45 linux-image-4.15.0-1045-oem 4.15.0-1045.50 linux-image-4.15.0-1057-snapdragon 4.15.0-1057.62 linux-image-4.15.0-54-generic 4.15.0-54.58 linux-image-4.15.0-54-generic-lpae 4.15.0-54.58 linux-image-4.15.0-54-lowlatency 4.15.0-54.58 linux-image-4.18.0-1023-azure 4.18.0-1023.24~18.04.1 linux-image-4.18.0-25-generic 4.18.0-25.26~18.04.1 linux-image-4.18.0-25-generic-lpae 4.18.0-25.26~18.04.1 linux-image-4.18.0-25-lowlatency 4.18.0-25.26~18.04.1 linux-image-4.18.0-25-snapdragon 4.18.0-25.26~18.04.1 linux-image-aws 4.15.0.1043.42 linux-image-azure 4.18.0.1023.21 linux-image-gcp 4.15.0.1036.38 linux-image-generic 4.15.0.54.56 linux-image-generic-hwe-18.04 4.18.0.25.74 linux-image-generic-lpae 4.15.0.54.56 linux-image-generic-lpae-hwe-18.04 4.18.0.25.74 linux-image-gke 4.15.0.1036.39 linux-image-gke-4.15 4.15.0.1036.39 linux-image-kvm 4.15.0.1038.38 linux-image-lowlatency 4.15.0.54.56 linux-image-lowlatency-hwe-18.04 4.18.0.25.74 linux-image-oem 4.15.0.1045.49 linux-image-oracle 4.15.0.1017.20 linux-image-powerpc-e500mc 4.15.0.54.56 linux-image-powerpc-smp 4.15.0.54.56 linux-image-powerpc64-emb 4.15.0.54.56 linux-image-powerpc64-smp 4.15.0.54.56 linux-image-raspi2 4.15.0.1040.38 linux-image-snapdragon 4.15.0.1057.60 linux-image-snapdragon-hwe-18.04 4.18.0.25.74 linux-image-virtual 4.15.0.54.56 linux-image-virtual-hwe-18.04 4.18.0.25.74 Ubuntu 16.04 LTS: linux-image-4.15.0-1017-oracle 4.15.0-1017.19~16.04.2 linux-image-4.15.0-1036-gcp 4.15.0-1036.38~16.04.1 linux-image-4.15.0-1043-aws 4.15.0-1043.45~16.04.1 linux-image-4.15.0-1049-azure 4.15.0-1049.54 linux-image-4.15.0-54-generic 4.15.0-54.58~16.04.1 linux-image-4.15.0-54-generic-lpae 4.15.0-54.58~16.04.1 linux-image-4.15.0-54-lowlatency 4.15.0-54.58~16.04.1 linux-image-4.4.0-1051-kvm 4.4.0-1051.58 linux-image-4.4.0-1087-aws 4.4.0-1087.98 linux-image-4.4.0-1114-raspi2 4.4.0-1114.123 linux-image-4.4.0-1118-snapdragon 4.4.0-1118.124 linux-image-4.4.0-154-generic 4.4.0-154.181 linux-image-4.4.0-154-generic-lpae 4.4.0-154.181 linux-image-4.4.0-154-lowlatency 4.4.0-154.181 linux-image-4.4.0-154-powerpc-e500mc 4.4.0-154.181 linux-image-4.4.0-154-powerpc-smp 4.4.0-154.181 linux-image-4.4.0-154-powerpc64-emb 4.4.0-154.181 linux-image-4.4.0-154-powerpc64-smp 4.4.0-154.181 linux-image-aws 4.4.0.1087.90 linux-image-aws-hwe 4.15.0.1043.43 linux-image-azure 4.15.0.1049.52 linux-image-gcp 4.15.0.1036.50 linux-image-generic 4.4.0.154.162 linux-image-generic-hwe-16.04 4.15.0.54.75 linux-image-generic-lpae 4.4.0.154.162 linux-image-generic-lpae-hwe-16.04 4.15.0.54.75 linux-image-gke 4.15.0.1036.50 linux-image-kvm 4.4.0.1051.51 linux-image-lowlatency 4.4.0.154.162 linux-image-lowlatency-hwe-16.04 4.15.0.54.75 linux-image-oem 4.15.0.54.75 linux-image-oracle 4.15.0.1017.11 linux-image-powerpc-e500mc 4.4.0.154.162 linux-image-powerpc-smp 4.4.0.154.162 linux-image-powerpc64-emb 4.4.0.154.162 linux-image-powerpc64-smp 4.4.0.154.162 linux-image-raspi2 4.4.0.1114.114 linux-image-snapdragon 4.4.0.1118.110 linux-image-virtual 4.4.0.154.162 linux-image-virtual-hwe-16.04 4.15.0.54.75 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/4041-1 CVE-2019-11479, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic Package Information: https://launchpad.net/ubuntu/+source/linux/5.0.0-20.21 https://launchpad.net/ubuntu/+source/linux-aws/5.0.0-1010.11 https://launchpad.net/ubuntu/+source/linux-azure/5.0.0-1010.10 https://launchpad.net/ubuntu/+source/linux-gcp/5.0.0-1010.10 https://launchpad.net/ubuntu/+source/linux-kvm/5.0.0-1010.11 https://launchpad.net/ubuntu/+source/linux-raspi2/5.0.0-1012.12 https://launchpad.net/ubuntu/+source/linux-snapdragon/5.0.0-1016.17 https://launchpad.net/ubuntu/+source/linux/4.18.0-25.26 https://launchpad.net/ubuntu/+source/linux-aws/4.18.0-1020.24 https://launchpad.net/ubuntu/+source/linux-azure/4.18.0-1023.24 https://launchpad.net/ubuntu/+source/linux-gcp/4.18.0-1015.16 https://launchpad.net/ubuntu/+source/linux-kvm/4.18.0-1016.17 https://launchpad.net/ubuntu/+source/linux-raspi2/4.18.0-1018.21 https://launchpad.net/ubuntu/+source/linux/4.15.0-54.58 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1043.45 https://launchpad.net/ubuntu/+source/linux-azure/4.18.0-1023.24~18.04.1 https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1036.38 https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1036.38 https://launchpad.net/ubuntu/+source/linux-hwe/4.18.0-25.26~18.04.1 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1038.38 https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1045.50 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1017.19 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1040.43 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1057.62 https://launchpad.net/ubuntu/+source/linux/4.4.0-154.181 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1087.98 https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1043.45~16.04.1 https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1049.54 https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1036.38~16.04.1 https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-54.58~16.04.1 https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1051.58 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1017.19~16.04.2 https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1114.123 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1118.124