========================================================================= Ubuntu Security Notice USN-4302-1 March 17, 2020 linux, linux-aws, linux-aws-hwe, linux-gcp, linux-gke-4.15, linux-hwe, linux-kvm, 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-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-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe: Linux hardware enablement (HWE) kernel Details: Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested (level 2) guest access the resources of a parent (level 1) guest in certain situations. An attacker could use this to expose sensitive information. (CVE-2020-2732) Gregory Herrero discovered that the fix for CVE-2019-14615 to address the Linux kernel not properly clearing data structures on context switches for certain Intel graphics processors was incomplete. A local attacker could use this to expose sensitive information. (CVE-2020-8832) It was discovered that the IPMI message handler implementation in the Linux kernel did not properly deallocate memory in certain situations. A local attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19046) It was discovered that the Intel WiMAX 2400 driver in the Linux kernel did not properly deallocate memory in certain situations. A local attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19051) It was discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could use this to possibly cause a denial of service (kernel memory exhaustion). (CVE-2019-19056) It was discovered that the Intel(R) Wi-Fi device driver in the Linux kernel device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19058) It was discovered that the Brocade BFA Fibre Channel device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19066) It was discovered that the Realtek RTL8xxx USB Wi-Fi device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19068) It was discovered that ZR364XX Camera USB device driver for the Linux kernel did not properly initialize memory. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15217) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-4.15.0-1055-gke 4.15.0-1055.58 linux-image-4.15.0-1056-kvm 4.15.0-1056.57 linux-image-4.15.0-1057-raspi2 4.15.0-1057.61 linux-image-4.15.0-1063-aws 4.15.0-1063.67 linux-image-4.15.0-1074-snapdragon 4.15.0-1074.81 linux-image-4.15.0-91-generic 4.15.0-91.92 linux-image-4.15.0-91-generic-lpae 4.15.0-91.92 linux-image-4.15.0-91-lowlatency 4.15.0-91.92 linux-image-aws 4.15.0.1063.64 linux-image-aws-lts-18.04 4.15.0.1063.64 linux-image-generic 4.15.0.91.83 linux-image-generic-lpae 4.15.0.91.83 linux-image-gke 4.15.0.1055.59 linux-image-gke-4.15 4.15.0.1055.59 linux-image-kvm 4.15.0.1056.56 linux-image-lowlatency 4.15.0.91.83 linux-image-powerpc-e500mc 4.15.0.91.83 linux-image-powerpc-smp 4.15.0.91.83 linux-image-powerpc64-emb 4.15.0.91.83 linux-image-powerpc64-smp 4.15.0.91.83 linux-image-raspi2 4.15.0.1057.55 linux-image-snapdragon 4.15.0.1074.77 linux-image-virtual 4.15.0.91.83 Ubuntu 16.04 LTS: linux-image-4.15.0-1058-gcp 4.15.0-1058.62 linux-image-4.15.0-1063-aws 4.15.0-1063.67~16.04.1 linux-image-4.15.0-91-generic 4.15.0-91.92~16.04.1 linux-image-4.15.0-91-generic-lpae 4.15.0-91.92~16.04.1 linux-image-4.15.0-91-lowlatency 4.15.0-91.92~16.04.1 linux-image-aws-hwe 4.15.0.1063.63 linux-image-gcp 4.15.0.1058.72 linux-image-generic-hwe-16.04 4.15.0.91.101 linux-image-generic-lpae-hwe-16.04 4.15.0.91.101 linux-image-gke 4.15.0.1058.72 linux-image-lowlatency-hwe-16.04 4.15.0.91.101 linux-image-oem 4.15.0.91.101 linux-image-virtual-hwe-16.04 4.15.0.91.101 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/4302-1 CVE-2019-15217, CVE-2019-19046, CVE-2019-19051, CVE-2019-19056, CVE-2019-19058, CVE-2019-19066, CVE-2019-19068, CVE-2020-2732, CVE-2020-8832 Package Information: https://launchpad.net/ubuntu/+source/linux/4.15.0-91.92 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1063.67 https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1055.58 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1056.57 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1057.61 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1074.81 https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1063.67~16.04.1 https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1058.62 https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-91.92~16.04.1