========================================================================= Ubuntu Security Notice USN-4162-1 October 22, 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 vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - 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-gke-4.15: Linux kernel for Google Container Engine (GKE) systems - linux-kvm: Linux kernel for cloud environments - linux-oem: Linux kernel for OEM processors - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi2: Linux kernel for Raspberry Pi 2 - linux-snapdragon: Linux kernel for Snapdragon processors - linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems - 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: It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not did not handle detach operations correctly, leading to a use-after-free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-21008) Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly perform bounds checking, leading to a heap overflow. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-14814, CVE-2019-14815, CVE-2019-14816) Matt Delco discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform bounds checking when handling coalesced MMIO write operations. A local attacker with write access to /dev/kvm could use this to cause a denial of service (system crash). (CVE-2019-14821) Hui Peng and Mathias Payer discovered that the USB audio driver for the Linux kernel did not properly validate device meta data. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15117) Hui Peng and Mathias Payer discovered that the USB audio driver for the Linux kernel improperly performed recursion while handling device meta data. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15118) It was discovered that the Technisat DVB-S/S2 USB device driver in the Linux kernel contained a buffer overread. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2019-15505) Brad Spengler discovered that a Spectre mitigation was improperly implemented in the ptrace susbsystem of the Linux kernel. A local attacker could possibly use this to expose sensitive information. (CVE-2019-15902) It was discovered that the SMB networking file system implementation in the Linux kernel contained a buffer overread. An attacker could use this to expose sensitive information (kernel memory). (CVE-2019-15918) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-4.15.0-1027-oracle 4.15.0-1027.30 linux-image-4.15.0-1046-gke 4.15.0-1046.49 linux-image-4.15.0-1048-kvm 4.15.0-1048.48 linux-image-4.15.0-1049-raspi2 4.15.0-1049.53 linux-image-4.15.0-1052-aws 4.15.0-1052.54 linux-image-4.15.0-1059-oem 4.15.0-1059.68 linux-image-4.15.0-1066-snapdragon 4.15.0-1066.73 linux-image-4.15.0-66-generic 4.15.0-66.75 linux-image-4.15.0-66-generic-lpae 4.15.0-66.75 linux-image-4.15.0-66-lowlatency 4.15.0-66.75 linux-image-aws 4.15.0.1052.51 linux-image-generic 4.15.0.66.68 linux-image-generic-lpae 4.15.0.66.68 linux-image-gke 4.15.0.1046.49 linux-image-gke-4.15 4.15.0.1046.49 linux-image-kvm 4.15.0.1048.48 linux-image-lowlatency 4.15.0.66.68 linux-image-oem 4.15.0.1059.63 linux-image-oracle 4.15.0.1027.30 linux-image-powerpc-e500mc 4.15.0.66.68 linux-image-powerpc-smp 4.15.0.66.68 linux-image-powerpc64-emb 4.15.0.66.68 linux-image-powerpc64-smp 4.15.0.66.68 linux-image-raspi2 4.15.0.1049.47 linux-image-snapdragon 4.15.0.1066.69 linux-image-virtual 4.15.0.66.68 Ubuntu 16.04 LTS: linux-image-4.15.0-1027-oracle 4.15.0-1027.30~16.04.1 linux-image-4.15.0-1047-gcp 4.15.0-1047.50 linux-image-4.15.0-1052-aws 4.15.0-1052.54~16.04.1 linux-image-4.15.0-1061-azure 4.15.0-1061.66 linux-image-4.15.0-66-generic 4.15.0-66.75~16.04.1 linux-image-4.15.0-66-generic-lpae 4.15.0-66.75~16.04.1 linux-image-4.15.0-66-lowlatency 4.15.0-66.75~16.04.1 linux-image-aws-hwe 4.15.0.1052.52 linux-image-azure 4.15.0.1061.64 linux-image-gcp 4.15.0.1047.61 linux-image-generic-hwe-16.04 4.15.0.66.86 linux-image-generic-lpae-hwe-16.04 4.15.0.66.86 linux-image-gke 4.15.0.1047.61 linux-image-lowlatency-hwe-16.04 4.15.0.66.86 linux-image-oem 4.15.0.66.86 linux-image-oracle 4.15.0.1027.20 linux-image-virtual-hwe-16.04 4.15.0.66.86 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/4162-1 CVE-2018-21008, CVE-2019-14814, CVE-2019-14815, CVE-2019-14816, CVE-2019-14821, CVE-2019-15117, CVE-2019-15118, CVE-2019-15505, CVE-2019-15902, CVE-2019-15918 Package Information: https://launchpad.net/ubuntu/+source/linux/4.15.0-66.75 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1052.54 https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1046.49 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1048.48 https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1059.68 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1027.30 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1049.53 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1066.73 https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1052.54~16.04.1 https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1061.66 https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1047.50 https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-66.75~16.04.1 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1027.30~16.04.1