========================================================================== Ubuntu Security Notice USN-6251-1 July 26, 2023 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4, linux-xilinx-zynqmp vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS (Available with Ubuntu Pro) 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-gke: Linux kernel for Google Container Engine (GKE) systems - linux-gkeop: Linux kernel for Google Container Engine (GKE) systems - linux-ibm: Linux kernel for IBM cloud systems - linux-kvm: Linux kernel for cloud environments - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi: Linux kernel for Raspberry Pi systems - linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors - linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems - linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems - linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe-5.4: Linux hardware enablement (HWE) kernel - linux-ibm-5.4: Linux kernel for IBM cloud systems - linux-oracle-5.4: Linux kernel for Oracle Cloud systems - linux-raspi-5.4: Linux kernel for Raspberry Pi systems Details: It was discovered that the IP-VLAN network driver for the Linux kernel did not properly initialize memory in some situations, leading to an out-of- bounds write vulnerability. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-3090) Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in the Ubuntu Linux kernel did not properly perform permission checks in certain situations. A local attacker could possibly use this to gain elevated privileges. (CVE-2023-32629) It was discovered that the netfilter subsystem in the Linux kernel did not properly handle some error conditions, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-3390) Tanguy Dubroca discovered that the netfilter subsystem in the Linux kernel did not properly handle certain pointer data type, leading to an out-of- bounds write vulnerability. A privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-35001) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.4.0-1026-xilinx-zynqmp 5.4.0-1026.30 linux-image-5.4.0-1053-ibm 5.4.0-1053.58 linux-image-5.4.0-1073-gkeop 5.4.0-1073.77 linux-image-5.4.0-1090-raspi 5.4.0-1090.101 linux-image-5.4.0-1095-kvm 5.4.0-1095.101 linux-image-5.4.0-1104-gke 5.4.0-1104.111 linux-image-5.4.0-1105-oracle 5.4.0-1105.114 linux-image-5.4.0-1106-aws 5.4.0-1106.114 linux-image-5.4.0-1109-gcp 5.4.0-1109.118 linux-image-5.4.0-1112-azure 5.4.0-1112.118 linux-image-5.4.0-155-generic 5.4.0-155.172 linux-image-5.4.0-155-generic-lpae 5.4.0-155.172 linux-image-5.4.0-155-lowlatency 5.4.0-155.172 linux-image-aws-lts-20.04 5.4.0.1106.103 linux-image-azure-lts-20.04 5.4.0.1112.105 linux-image-gcp-lts-20.04 5.4.0.1109.111 linux-image-generic 5.4.0.155.151 linux-image-generic-lpae 5.4.0.155.151 linux-image-gke 5.4.0.1104.109 linux-image-gke-5.4 5.4.0.1104.109 linux-image-gkeop 5.4.0.1073.71 linux-image-gkeop-5.4 5.4.0.1073.71 linux-image-ibm 5.4.0.1053.79 linux-image-ibm-lts-20.04 5.4.0.1053.79 linux-image-kvm 5.4.0.1095.90 linux-image-lowlatency 5.4.0.155.151 linux-image-oem 5.4.0.155.151 linux-image-oem-osp1 5.4.0.155.151 linux-image-oracle-lts-20.04 5.4.0.1105.98 linux-image-raspi 5.4.0.1090.120 linux-image-raspi2 5.4.0.1090.120 linux-image-virtual 5.4.0.155.151 linux-image-xilinx-zynqmp 5.4.0.1026.28 Ubuntu 18.04 LTS (Available with Ubuntu Pro): linux-image-5.4.0-1053-ibm 5.4.0-1053.58~18.04.1 linux-image-5.4.0-1090-raspi 5.4.0-1090.101~18.04.1 linux-image-5.4.0-1105-oracle 5.4.0-1105.114~18.04.1 linux-image-5.4.0-1106-aws 5.4.0-1106.114~18.04.1 linux-image-5.4.0-1109-gcp 5.4.0-1109.118~18.04.1 linux-image-5.4.0-1112-azure 5.4.0-1112.118~18.04.1 linux-image-5.4.0-155-generic 5.4.0-155.172~18.04.1 linux-image-5.4.0-155-generic-lpae 5.4.0-155.172~18.04.1 linux-image-5.4.0-155-lowlatency 5.4.0-155.172~18.04.1 linux-image-aws 5.4.0.1106.84 linux-image-azure 5.4.0.1112.85 linux-image-gcp 5.4.0.1109.85 linux-image-generic-hwe-18.04 5.4.0.155.172~18.04.125 linux-image-generic-lpae-hwe-18.04 5.4.0.155.172~18.04.125 linux-image-ibm 5.4.0.1053.64 linux-image-lowlatency-hwe-18.04 5.4.0.155.172~18.04.125 linux-image-oem 5.4.0.155.172~18.04.125 linux-image-oem-osp1 5.4.0.155.172~18.04.125 linux-image-oracle 5.4.0.1105.114~18.04.77 linux-image-raspi-hwe-18.04 5.4.0.1090.87 linux-image-snapdragon-hwe-18.04 5.4.0.155.172~18.04.125 linux-image-virtual-hwe-18.04 5.4.0.155.172~18.04.125 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://ubuntu.com/security/notices/USN-6251-1 CVE-2023-3090, CVE-2023-32629, CVE-2023-3390, CVE-2023-35001 Package Information: https://launchpad.net/ubuntu/+source/linux/5.4.0-155.172 https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1106.114 https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1112.118 https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1109.118 https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1104.111 https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1073.77 https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1053.58 https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1095.101 https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1105.114 https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1090.101 https://launchpad.net/ubuntu/+source/linux-xilinx-zynqmp/5.4.0-1026.30