========================================================================== Ubuntu Security Notice USN-6417-1 October 04, 2023 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-bluefield, linux-gcp, linux-gcp-5.4, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-iot, 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-bluefield: Linux kernel for NVIDIA BlueField platforms - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-gkeop: Linux kernel for Google Container Engine (GKE) systems - linux-ibm: Linux kernel for IBM cloud systems - linux-iot: Linux kernel for IoT platforms - 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 eBPF implementation in the Linux kernel contained a race condition around read-only maps. A privileged attacker could use this to modify read-only maps. (CVE-2021-4001) It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A remote attacker could use this to cause a denial of service (excessive CPU consumption). (CVE-2023-1206) Yang Lan discovered that the GFS2 file system implementation in the Linux kernel could attempt to dereference a null pointer in some situations. An attacker could use this to construct a malicious GFS2 image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2023-3212) Davide Ornaghi discovered that the DECnet network protocol implementation in the Linux kernel contained a null pointer dereference vulnerability. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Please note that kernel support for the DECnet has been removed to resolve this CVE. (CVE-2023-3338) It was discovered that the NFC implementation in the Linux kernel contained a use-after-free vulnerability when performing peer-to-peer communication in certain conditions. A privileged attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2023-3863) It was discovered that the TUN/TAP driver in the Linux kernel did not properly initialize socket data. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-4194) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.4.0-1023-iot 5.4.0-1023.24 linux-image-5.4.0-1031-xilinx-zynqmp 5.4.0-1031.35 linux-image-5.4.0-1058-ibm 5.4.0-1058.63 linux-image-5.4.0-1072-bluefield 5.4.0-1072.78 linux-image-5.4.0-1078-gkeop 5.4.0-1078.82 linux-image-5.4.0-1095-raspi 5.4.0-1095.106 linux-image-5.4.0-1100-kvm 5.4.0-1100.106 linux-image-5.4.0-1110-oracle 5.4.0-1110.119 linux-image-5.4.0-1111-aws 5.4.0-1111.120 linux-image-5.4.0-1115-gcp 5.4.0-1115.124 linux-image-5.4.0-1117-azure 5.4.0-1117.124 linux-image-5.4.0-164-generic 5.4.0-164.181 linux-image-5.4.0-164-generic-lpae 5.4.0-164.181 linux-image-5.4.0-164-lowlatency 5.4.0-164.181 linux-image-aws-lts-20.04 5.4.0.1111.108 linux-image-azure-lts-20.04 5.4.0.1117.110 linux-image-bluefield 5.4.0.1072.67 linux-image-gcp-lts-20.04 5.4.0.1115.117 linux-image-generic 5.4.0.164.161 linux-image-generic-lpae 5.4.0.164.161 linux-image-gkeop 5.4.0.1078.76 linux-image-gkeop-5.4 5.4.0.1078.76 linux-image-ibm-lts-20.04 5.4.0.1058.87 linux-image-kvm 5.4.0.1100.95 linux-image-lowlatency 5.4.0.164.161 linux-image-oem 5.4.0.164.161 linux-image-oem-osp1 5.4.0.164.161 linux-image-oracle-lts-20.04 5.4.0.1110.103 linux-image-raspi 5.4.0.1095.125 linux-image-raspi2 5.4.0.1095.125 linux-image-virtual 5.4.0.164.161 linux-image-xilinx-zynqmp 5.4.0.1031.32 Ubuntu 18.04 LTS (Available with Ubuntu Pro): linux-image-5.4.0-1058-ibm 5.4.0-1058.63~18.04.1 linux-image-5.4.0-1095-raspi 5.4.0-1095.106~18.04.1 linux-image-5.4.0-1110-oracle 5.4.0-1110.119~18.04.1 linux-image-5.4.0-1111-aws 5.4.0-1111.120~18.04.1 linux-image-5.4.0-1115-gcp 5.4.0-1115.124~18.04.1 linux-image-5.4.0-1117-azure 5.4.0-1117.124~18.04.1 linux-image-5.4.0-164-generic 5.4.0-164.181~18.04.1 linux-image-5.4.0-164-lowlatency 5.4.0-164.181~18.04.1 linux-image-aws 5.4.0.1111.89 linux-image-azure 5.4.0.1117.90 linux-image-gcp 5.4.0.1115.91 linux-image-generic-hwe-18.04 5.4.0.164.181~18.04.131 linux-image-ibm 5.4.0.1058.69 linux-image-lowlatency-hwe-18.04 5.4.0.164.181~18.04.131 linux-image-oem 5.4.0.164.181~18.04.131 linux-image-oem-osp1 5.4.0.164.181~18.04.131 linux-image-oracle 5.4.0.1110.119~18.04.82 linux-image-raspi-hwe-18.04 5.4.0.1095.92 linux-image-snapdragon-hwe-18.04 5.4.0.164.181~18.04.131 linux-image-virtual-hwe-18.04 5.4.0.164.181~18.04.131 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-6417-1 CVE-2021-4001, CVE-2023-1206, CVE-2023-3212, CVE-2023-3338, CVE-2023-3863, CVE-2023-4194 Package Information: https://launchpad.net/ubuntu/+source/linux/5.4.0-164.181 https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1111.120 https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1117.124 https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1072.78 https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1115.124 https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1078.82 https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1058.63 https://launchpad.net/ubuntu/+source/linux-iot/5.4.0-1023.24 https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1100.106 https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1110.119 https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1095.106 https://launchpad.net/ubuntu/+source/linux-xilinx-zynqmp/5.4.0-1031.35