Ubuntu 6416-1: Linux kernel vulnerabilities
Summary
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS - Ubuntu 20.04 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-azure: Linux kernel for Microsoft Azure Cloud systems - linux-azure-fde: Linux kernel for Microsoft Azure CVM 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-lowlatency: Linux low latency kernel - linux-nvidia: Linux kernel for NVIDIA systems - linux-oracle: Linux kernel for Oracle Cloud systems - linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems - linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems - linux-azure-fde-5.15: Linux kernel for Microsoft Azure CVM cloud systems - linux-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems - linux-gkeop-5.15: Linux kernel for Google Container Engine (GKE) systems - linux-ibm-5.15: Linux kernel for IBM cloud systems - linux-lowlatency-hwe-5.15: Linux low latency kernel Details: 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) Daniel Trujillo, Johannes Wikner, and Kaveh Razavi discovered that some AMD processors utilising speculative execution and branch prediction may allow unauthorised memory reads via a speculative side-channel attack. A local attacker could use this to expose sensitive information, including kernel memory. (CVE-2023-20569) It was discovered that the IPv6 RPL protocol implementation in the Linux kernel did not properly handle user-supplied data. A remote attacker could use this to cause a denial of service (system crash). (CVE-2023-2156) 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) Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel did not properly validate command payload size, leading to a out-of-bounds read vulnerability. A remote attacker could possibly use this to cause a denial of service (system crash). (CVE-2023-38432) 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) Laurence Wit discovered that the KSMBD implementation in the Linux kernel did not properly validate a buffer size in certain situations, leading to an out-of-bounds read vulnerability. A remote attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-3865) Laurence Wit discovered that the KSMBD implementation in the Linux kernel contained a null pointer dereference vulnerability when handling handling chained requests. A remote attacker could use this to cause a denial of service (system crash). (CVE-2023-3866) It was discovered that the Siano USB MDTV receiver device driver in the Linux kernel did not properly handle device initialization failures in certain situations, leading to a use-after-free vulnerability. A physically proximate attacker could use this cause a denial of service (system crash). (CVE-2023-4132) Andy Nguyen discovered that the KVM implementation for AMD processors in the Linux kernel with Secure Encrypted Virtualization (SEV) contained a race condition when accessing the GHCB page. A local attacker in a SEV guest VM could possibly use this to cause a denial of service (host system crash). (CVE-2023-4155) 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) Maxim Suhanov discovered that the exFAT file system implementation in the Linux kernel did not properly check a file name length, leading to an out- of-bounds write vulnerability. An attacker could use this to construct a malicious exFAT image that, when mounted and operated on, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-4273) Thelford Williams discovered that the Ceph file system messenger protocol implementation in the Linux kernel did not properly validate frame segment length in certain situation, leading to a buffer overflow vulnerability. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-44466)
Update Instructions
The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.15.0-1030-gkeop 5.15.0-1030.35 linux-image-5.15.0-1037-nvidia 5.15.0-1037.37 linux-image-5.15.0-1037-nvidia-lowlatency 5.15.0-1037.37 linux-image-5.15.0-1040-ibm 5.15.0-1040.43 linux-image-5.15.0-1044-gcp 5.15.0-1044.52 linux-image-5.15.0-1044-gke 5.15.0-1044.49 linux-image-5.15.0-1044-kvm 5.15.0-1044.49 linux-image-5.15.0-1045-oracle 5.15.0-1045.51 linux-image-5.15.0-1047-aws 5.15.0-1047.52 linux-image-5.15.0-1049-azure 5.15.0-1049.56 linux-image-5.15.0-1049-azure-fde 5.15.0-1049.56.1 linux-image-5.15.0-86-generic 5.15.0-86.96 linux-image-5.15.0-86-generic-64k 5.15.0-86.96 linux-image-5.15.0-86-generic-lpae 5.15.0-86.96 linux-image-5.15.0-86-lowlatency 5.15.0-86.95 linux-image-5.15.0-86-lowlatency-64k 5.15.0-86.95 linux-image-aws-lts-22.04 5.15.0.1047.46 linux-image-azure-fde-lts-22.04 5.15.0.1049.56.27 linux-image-azure-lts-22.04 5.15.0.1049.45 linux-image-gcp-lts-22.04 5.15.0.1044.40 linux-image-generic 5.15.0.86.83 linux-image-generic-64k 5.15.0.86.83 linux-image-generic-lpae 5.15.0.86.83 linux-image-gke 5.15.0.1044.43 linux-image-gke-5.15 5.15.0.1044.43 linux-image-gkeop 5.15.0.1030.29 linux-image-gkeop-5.15 5.15.0.1030.29 linux-image-ibm 5.15.0.1040.36 linux-image-kvm 5.15.0.1044.40 linux-image-lowlatency 5.15.0.86.88 linux-image-lowlatency-64k 5.15.0.86.88 linux-image-nvidia 5.15.0.1037.37 linux-image-nvidia-lowlatency 5.15.0.1037.37 linux-image-oracle 5.15.0.1045.40 linux-image-oracle-lts-22.04 5.15.0.1045.40 linux-image-virtual 5.15.0.86.83 Ubuntu 20.04 LTS: linux-image-5.15.0-1030-gkeop 5.15.0-1030.35~20.04.1 linux-image-5.15.0-1040-ibm 5.15.0-1040.43~20.04.1 linux-image-5.15.0-1044-gcp 5.15.0-1044.52~20.04.1 linux-image-5.15.0-1047-aws 5.15.0-1047.52~20.04.1 linux-image-5.15.0-1049-azure 5.15.0-1049.56~20.04.1 linux-image-5.15.0-1049-azure-fde 5.15.0-1049.56~20.04.1.1 linux-image-5.15.0-86-lowlatency 5.15.0-86.95~20.04.1 linux-image-5.15.0-86-lowlatency-64k 5.15.0-86.95~20.04.1 linux-image-aws 5.15.0.1047.52~20.04.35 linux-image-azure 5.15.0.1049.56~20.04.38 linux-image-azure-cvm 5.15.0.1049.56~20.04.38 linux-image-azure-fde 5.15.0.1049.56~20.04.1.27 linux-image-gcp 5.15.0.1044.52~20.04.1 linux-image-gkeop-5.15 5.15.0.1030.35~20.04.26 linux-image-ibm 5.15.0.1040.43~20.04.12 linux-image-lowlatency-64k-hwe-20.04 5.15.0.86.95~20.04.41 linux-image-lowlatency-hwe-20.04 5.15.0.86.95~20.04.41 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-6416-1
CVE-2023-1206, CVE-2023-20569, CVE-2023-2156, CVE-2023-3338,
CVE-2023-38432, CVE-2023-3863, CVE-2023-3865, CVE-2023-3866,
CVE-2023-4132, CVE-2023-4155, CVE-2023-4194, CVE-2023-4273,
CVE-2023-44466
Package Information
https://launchpad.net/ubuntu/+source/linux/5.15.0-86.96 https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1047.52 https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1049.56 https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1049.56.1 https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1044.52 https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1044.49 https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1030.35 https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1040.43 https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1044.49 https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-86.95 https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1037.37 https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1045.51 https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1047.52~20.04.1 https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1049.56~20.04.1 https://launchpad.net/ubuntu/+source/linux-azure-fde-5.15/5.15.0-1049.56~20.04.1.1 https://launchpad.net/ubuntu/+source/linux-gcp-5.15/5.15.0-1044.52~20.04.1 https://launchpad.net/ubuntu/+source/linux-gkeop-5.15/5.15.0-1030.35~20.04.1 https://launchpad.net/ubuntu/+source/linux-ibm-5.15/5.15.0-1040.43~20.04.1 https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-5.15/5.15.0-86.95~20.04.1
