========================================================================= Ubuntu Security Notice USN-4369-1 May 21, 2020 linux, linux-aws, linux-aws-5.3, linux-gcp, linux-gcp-5.3, linux-gke-5.3, linux-hwe, linux-kvm, linux-oracle, linux-oracle-5.3, linux-raspi2 vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 19.10 - Ubuntu 18.04 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-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-kvm: Linux kernel for cloud environments - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi2: Linux kernel for Raspberry Pi (V7) systems - linux-aws-5.3: Linux kernel for Amazon Web Services (AWS) systems - linux-gcp-5.3: Linux kernel for Google Cloud Platform (GCP) systems - linux-gke-5.3: Linux kernel for Google Container Engine (GKE) systems - linux-hwe: Linux hardware enablement (HWE) kernel - linux-oracle-5.3: Linux kernel for Oracle Cloud systems Details: It was discovered that the btrfs implementation in the Linux kernel did not properly detect that a block was marked dirty in some situations. An attacker could use this to specially craft a file system image that, when unmounted, could cause a denial of service (system crash). (CVE-2019-19377) Tristan Madani discovered that the file locking implementation in the Linux kernel contained a race condition. A local attacker could possibly use this to cause a denial of service or expose sensitive information. (CVE-2019-19769) It was discovered that the Serial CAN interface driver in the Linux kernel did not properly initialize data. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-11494) It was discovered that the linux kernel did not properly validate certain mount options to the tmpfs virtual memory file system. A local attacker with the ability to specify mount options could use this to cause a denial of service (system crash). (CVE-2020-11565) It was discovered that the OV51x USB Camera device driver in the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2020-11608) It was discovered that the STV06XX USB Camera device driver in the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2020-11609) It was discovered that the Xirlink C-It USB Camera device driver in the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2020-11668) It was discovered that the block layer in the Linux kernel contained a race condition leading to a use-after-free vulnerability. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2020-12657) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 19.10: linux-image-5.3.0-1017-kvm 5.3.0-1017.19 linux-image-5.3.0-1018-oracle 5.3.0-1018.20 linux-image-5.3.0-1019-aws 5.3.0-1019.21 linux-image-5.3.0-1020-gcp 5.3.0-1020.22 linux-image-5.3.0-1025-raspi2 5.3.0-1025.27 linux-image-5.3.0-53-generic 5.3.0-53.47 linux-image-5.3.0-53-generic-lpae 5.3.0-53.47 linux-image-5.3.0-53-lowlatency 5.3.0-53.47 linux-image-5.3.0-53-snapdragon 5.3.0-53.47 linux-image-aws 5.3.0.1019.31 linux-image-gcp 5.3.0.1020.31 linux-image-generic 5.3.0.53.45 linux-image-generic-lpae 5.3.0.53.45 linux-image-gke 5.3.0.1020.31 linux-image-kvm 5.3.0.1017.19 linux-image-lowlatency 5.3.0.53.45 linux-image-oracle 5.3.0.1018.33 linux-image-raspi2 5.3.0.1025.22 linux-image-snapdragon 5.3.0.53.45 linux-image-virtual 5.3.0.53.45 Ubuntu 18.04 LTS: linux-image-5.3.0-1018-oracle 5.3.0-1018.20~18.04.1 linux-image-5.3.0-1019-aws 5.3.0-1019.21~18.04.1 linux-image-5.3.0-1020-gcp 5.3.0-1020.22~18.04.1 linux-image-5.3.0-1020-gke 5.3.0-1020.22~18.04.1 linux-image-5.3.0-53-generic 5.3.0-53.47~18.04.1 linux-image-5.3.0-53-generic-lpae 5.3.0-53.47~18.04.1 linux-image-5.3.0-53-lowlatency 5.3.0-53.47~18.04.1 linux-image-aws 5.3.0.1019.20 linux-image-aws-edge 5.3.0.1019.20 linux-image-gcp 5.3.0.1020.19 linux-image-gcp-edge 5.3.0.1020.19 linux-image-generic-hwe-18.04 5.3.0.53.109 linux-image-generic-lpae-hwe-18.04 5.3.0.53.109 linux-image-gke-5.3 5.3.0.1020.10 linux-image-gkeop-5.3 5.3.0.53.109 linux-image-lowlatency-hwe-18.04 5.3.0.53.109 linux-image-oracle 5.3.0.1018.19 linux-image-snapdragon-hwe-18.04 5.3.0.53.109 linux-image-virtual-hwe-18.04 5.3.0.53.109 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/4369-1 CVE-2019-19377, CVE-2019-19769, CVE-2020-11494, CVE-2020-11565, CVE-2020-11608, CVE-2020-11609, CVE-2020-11668, CVE-2020-12657 Package Information: https://launchpad.net/ubuntu/+source/linux/5.3.0-53.47 https://launchpad.net/ubuntu/+source/linux-aws/5.3.0-1019.21 https://launchpad.net/ubuntu/+source/linux-gcp/5.3.0-1020.22 https://launchpad.net/ubuntu/+source/linux-kvm/5.3.0-1017.19 https://launchpad.net/ubuntu/+source/linux-oracle/5.3.0-1018.20 https://launchpad.net/ubuntu/+source/linux-raspi2/5.3.0-1025.27 https://launchpad.net/ubuntu/+source/linux-aws-5.3/5.3.0-1019.21~18.04.1 https://launchpad.net/ubuntu/+source/linux-gcp-5.3/5.3.0-1020.22~18.04.1 https://launchpad.net/ubuntu/+source/linux-gke-5.3/5.3.0-1020.22~18.04.1 https://launchpad.net/ubuntu/+source/linux-hwe/5.3.0-53.47~18.04.1 https://launchpad.net/ubuntu/+source/linux-oracle-5.3/5.3.0-1018.20~18.04.1