========================================================================== Ubuntu Security Notice USN-6548-1 December 11, 2023 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-bluefield, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-kvm, 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-ibm: Linux kernel for IBM cloud systems - linux-kvm: Linux kernel for cloud environments - 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 Details: It was discovered that Spectre-BHB mitigations were missing for Ampere processors. A local attacker could potentially use this to expose sensitive information. (CVE-2023-3006) It was discovered that the USB subsystem in the Linux kernel contained a race condition while handling device descriptors in certain situations, leading to a out-of-bounds read vulnerability. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2023-37453) Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate some attributes passed from userspace. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2023-39189) Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did not properly validate u32 packets content, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-39192) Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate SCTP data, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-39193) Lucas Leong discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not properly handle state filters, leading to an out- of-bounds read vulnerability. A privileged local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-39194) Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did not properly handle socket buffers (skb) when performing IP routing in certain circumstances, leading to a null pointer dereference vulnerability. A privileged attacker could use this to cause a denial of service (system crash). (CVE-2023-42754) Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel did not properly handle queue initialization failures in certain situations, leading to a use-after-free vulnerability. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-5178) Budimir Markovic discovered that the perf subsystem in the Linux kernel did not properly handle event groups, leading to an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-5717) It was discovered that the TLS subsystem in the Linux kernel did not properly perform cryptographic operations in some situations, leading to a null pointer dereference vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-6176) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.4.0-1035-xilinx-zynqmp 5.4.0-1035.39 linux-image-5.4.0-1063-ibm 5.4.0-1063.68 linux-image-5.4.0-1076-bluefield 5.4.0-1076.82 linux-image-5.4.0-1104-kvm 5.4.0-1104.111 linux-image-5.4.0-1116-aws 5.4.0-1116.126 linux-image-5.4.0-1120-gcp 5.4.0-1120.129 linux-image-5.4.0-1121-azure 5.4.0-1121.128 linux-image-5.4.0-169-generic 5.4.0-169.187 linux-image-5.4.0-169-generic-lpae 5.4.0-169.187 linux-image-5.4.0-169-lowlatency 5.4.0-169.187 linux-image-aws-lts-20.04 5.4.0.1116.113 linux-image-azure-lts-20.04 5.4.0.1121.114 linux-image-bluefield 5.4.0.1076.71 linux-image-gcp-lts-20.04 5.4.0.1120.122 linux-image-generic 5.4.0.169.167 linux-image-generic-lpae 5.4.0.169.167 linux-image-ibm-lts-20.04 5.4.0.1063.92 linux-image-kvm 5.4.0.1104.100 linux-image-lowlatency 5.4.0.169.167 linux-image-oem 5.4.0.169.167 linux-image-oem-osp1 5.4.0.169.167 linux-image-virtual 5.4.0.169.167 linux-image-xilinx-zynqmp 5.4.0.1035.35 Ubuntu 18.04 LTS (Available with Ubuntu Pro): linux-image-5.4.0-1063-ibm 5.4.0-1063.68~18.04.1 linux-image-5.4.0-1116-aws 5.4.0-1116.126~18.04.1 linux-image-5.4.0-1120-gcp 5.4.0-1120.129~18.04.1 linux-image-5.4.0-1121-azure 5.4.0-1121.128~18.04.1 linux-image-5.4.0-169-generic 5.4.0-169.187~18.04.1 linux-image-5.4.0-169-lowlatency 5.4.0-169.187~18.04.1 linux-image-aws 5.4.0.1116.94 linux-image-azure 5.4.0.1121.94 linux-image-gcp 5.4.0.1120.96 linux-image-generic-hwe-18.04 5.4.0.169.187~18.04.137 linux-image-ibm 5.4.0.1063.73 linux-image-lowlatency-hwe-18.04 5.4.0.169.187~18.04.137 linux-image-oem 5.4.0.169.187~18.04.137 linux-image-oem-osp1 5.4.0.169.187~18.04.137 linux-image-snapdragon-hwe-18.04 5.4.0.169.187~18.04.137 linux-image-virtual-hwe-18.04 5.4.0.169.187~18.04.137 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-6548-1 CVE-2023-3006, CVE-2023-37453, CVE-2023-39189, CVE-2023-39192, CVE-2023-39193, CVE-2023-39194, CVE-2023-42754, CVE-2023-5178, CVE-2023-5717, CVE-2023-6176 Package Information: https://launchpad.net/ubuntu/+source/linux/5.4.0-169.187 https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1116.126 https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1121.128 https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1076.82 https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1120.129 https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1063.68 https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1104.111 https://launchpad.net/ubuntu/+source/linux-xilinx-zynqmp/5.4.0-1035.39