========================================================================= Ubuntu Security Notice USN-4017-1 June 17, 2019 linux, linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities ========================================================================= 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: The system could be made to crash if it received specially crafted network traffic. Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) 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-azure: Linux kernel for Microsoft Azure Cloud 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: Jonathan Looney discovered that the TCP retransmission queue implementation in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service. (CVE-2019-11478) Jonathan Looney discovered that an integer overflow existed in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service (system crash). (CVE-2019-11477) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04: linux-image-5.0.0-1008-aws 5.0.0-1008.8 linux-image-5.0.0-1008-gcp 5.0.0-1008.8 linux-image-5.0.0-1008-kvm 5.0.0-1008.8 linux-image-5.0.0-1010-raspi2 5.0.0-1010.10 linux-image-5.0.0-1014-snapdragon 5.0.0-1014.14 linux-image-5.0.0-17-generic 5.0.0-17.18 linux-image-5.0.0-17-generic-lpae 5.0.0-17.18 linux-image-5.0.0-17-lowlatency 5.0.0-17.18 linux-image-aws 5.0.0.1008.8 linux-image-gcp 5.0.0.1008.8 linux-image-generic 5.0.0.17.18 linux-image-generic-lpae 5.0.0.17.18 linux-image-gke 5.0.0.1008.8 linux-image-kvm 5.0.0.1008.8 linux-image-lowlatency 5.0.0.17.18 linux-image-raspi2 5.0.0.1010.7 linux-image-snapdragon 5.0.0.1014.7 linux-image-virtual 5.0.0.17.18 Ubuntu 18.10: linux-image-4.18.0-1013-gcp 4.18.0-1013.14 linux-image-4.18.0-1014-kvm 4.18.0-1014.14 linux-image-4.18.0-1016-raspi2 4.18.0-1016.18 linux-image-4.18.0-1018-aws 4.18.0-1018.20 linux-image-4.18.0-1020-azure 4.18.0-1020.20 linux-image-4.18.0-22-generic 4.18.0-22.23 linux-image-4.18.0-22-generic-lpae 4.18.0-22.23 linux-image-4.18.0-22-lowlatency 4.18.0-22.23 linux-image-4.18.0-22-snapdragon 4.18.0-22.23 linux-image-aws 4.18.0.1018.18 linux-image-azure 4.18.0.1020.21 linux-image-gcp 4.18.0.1013.13 linux-image-generic 4.18.0.22.23 linux-image-generic-lpae 4.18.0.22.23 linux-image-gke 4.18.0.1013.13 linux-image-kvm 4.18.0.1014.14 linux-image-lowlatency 4.18.0.22.23 linux-image-raspi2 4.18.0.1016.13 linux-image-snapdragon 4.18.0.22.23 linux-image-virtual 4.18.0.22.23 Ubuntu 18.04 LTS: linux-image-4.15.0-1015-oracle 4.15.0-1015.17 linux-image-4.15.0-1034-gcp 4.15.0-1034.36 linux-image-4.15.0-1036-kvm 4.15.0-1036.36 linux-image-4.15.0-1038-raspi2 4.15.0-1038.40 linux-image-4.15.0-1041-aws 4.15.0-1041.43 linux-image-4.15.0-1043-oem 4.15.0-1043.48 linux-image-4.15.0-1055-snapdragon 4.15.0-1055.59 linux-image-4.15.0-52-generic 4.15.0-52.56 linux-image-4.15.0-52-generic-lpae 4.15.0-52.56 linux-image-4.15.0-52-lowlatency 4.15.0-52.56 linux-image-4.18.0-1020-azure 4.18.0-1020.20~18.04.1 linux-image-4.18.0-22-generic 4.18.0-22.23~18.04.1 linux-image-4.18.0-22-generic-lpae 4.18.0-22.23~18.04.1 linux-image-4.18.0-22-lowlatency 4.18.0-22.23~18.04.1 linux-image-4.18.0-22-snapdragon 4.18.0-22.23~18.04.1 linux-image-aws 4.15.0.1041.40 linux-image-azure 4.18.0.1020.19 linux-image-gcp 4.15.0.1034.36 linux-image-generic 4.15.0.52.54 linux-image-generic-hwe-18.04 4.18.0.22.72 linux-image-generic-lpae 4.15.0.52.54 linux-image-generic-lpae-hwe-18.04 4.18.0.22.72 linux-image-kvm 4.15.0.1036.36 linux-image-lowlatency 4.15.0.52.54 linux-image-lowlatency-hwe-18.04 4.18.0.22.72 linux-image-oem 4.15.0.1043.47 linux-image-oracle 4.15.0.1015.18 linux-image-raspi2 4.15.0.1038.36 linux-image-snapdragon 4.15.0.1055.58 linux-image-snapdragon-hwe-18.04 4.18.0.22.72 linux-image-virtual 4.15.0.52.54 linux-image-virtual-hwe-18.04 4.18.0.22.72 Ubuntu 16.04 LTS: linux-image-4.15.0-1015-oracle 4.15.0-1015.17~16.04.1 linux-image-4.15.0-1034-gcp 4.15.0-1034.36~16.04.1 linux-image-4.15.0-1041-aws 4.15.0-1041.43~16.04.1 linux-image-4.15.0-1047-azure 4.15.0-1047.51 linux-image-4.15.0-52-generic 4.15.0-52.56~16.04.1 linux-image-4.15.0-52-generic-lpae 4.15.0-52.56~16.04.1 linux-image-4.15.0-52-lowlatency 4.15.0-52.56~16.04.1 linux-image-4.4.0-1048-kvm 4.4.0-1048.55 linux-image-4.4.0-1085-aws 4.4.0-1085.96 linux-image-4.4.0-1111-raspi2 4.4.0-1111.120 linux-image-4.4.0-1115-snapdragon 4.4.0-1115.121 linux-image-4.4.0-151-generic 4.4.0-151.178 linux-image-4.4.0-151-generic-lpae 4.4.0-151.178 linux-image-4.4.0-151-lowlatency 4.4.0-151.178 linux-image-4.4.0-151-powerpc-e500mc 4.4.0-151.178 linux-image-4.4.0-151-powerpc-smp 4.4.0-151.178 linux-image-4.4.0-151-powerpc64-emb 4.4.0-151.178 linux-image-4.4.0-151-powerpc64-smp 4.4.0-151.178 linux-image-aws 4.4.0.1085.88 linux-image-aws-hwe 4.15.0.1041.41 linux-image-azure 4.15.0.1047.51 linux-image-gcp 4.15.0.1034.48 linux-image-generic 4.4.0.151.159 linux-image-generic-hwe-16.04 4.15.0.52.73 linux-image-generic-lpae 4.4.0.151.159 linux-image-generic-lpae-hwe-16.04 4.15.0.52.73 linux-image-gke 4.15.0.1034.48 linux-image-kvm 4.4.0.1048.48 linux-image-lowlatency 4.4.0.151.159 linux-image-lowlatency-hwe-16.04 4.15.0.52.73 linux-image-oem 4.15.0.52.73 linux-image-oracle 4.15.0.1015.9 linux-image-powerpc-e500mc 4.4.0.151.159 linux-image-powerpc-smp 4.4.0.151.159 linux-image-powerpc64-emb 4.4.0.151.159 linux-image-powerpc64-smp 4.4.0.151.159 linux-image-raspi2 4.4.0.1111.111 linux-image-snapdragon 4.4.0.1115.107 linux-image-virtual 4.4.0.151.159 linux-image-virtual-hwe-16.04 4.15.0.52.73 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/4017-1 CVE-2019-11477, CVE-2019-11478, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic Package Information: https://launchpad.net/ubuntu/+source/linux/5.0.0-17.18 https://launchpad.net/ubuntu/+source/linux-aws/5.0.0-1008.8 https://launchpad.net/ubuntu/+source/linux-gcp/5.0.0-1008.8 https://launchpad.net/ubuntu/+source/linux-kvm/5.0.0-1008.8 https://launchpad.net/ubuntu/+source/linux-raspi2/5.0.0-1010.10 https://launchpad.net/ubuntu/+source/linux-snapdragon/5.0.0-1014.14 https://launchpad.net/ubuntu/+source/linux/4.18.0-22.23 https://launchpad.net/ubuntu/+source/linux-aws/4.18.0-1018.20 https://launchpad.net/ubuntu/+source/linux-azure/4.18.0-1020.20 https://launchpad.net/ubuntu/+source/linux-gcp/4.18.0-1013.14 https://launchpad.net/ubuntu/+source/linux-kvm/4.18.0-1014.14 https://launchpad.net/ubuntu/+source/linux-raspi2/4.18.0-1016.18 https://launchpad.net/ubuntu/+source/linux/4.15.0-52.56 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1041.43 https://launchpad.net/ubuntu/+source/linux-azure/4.18.0-1020.20~18.04.1 https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1034.36 https://launchpad.net/ubuntu/+source/linux-hwe/4.18.0-22.23~18.04.1 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1036.36 https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1043.48 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1015.17 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1038.40 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1055.59 https://launchpad.net/ubuntu/+source/linux/4.4.0-151.178 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1085.96 https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1041.43~16.04.1 https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1047.51 https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1034.36~16.04.1 https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-52.56~16.04.1 https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1048.55 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1015.17~16.04.1 https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1111.120 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1115.121