========================================================================== Ubuntu Security Notice USN-6412-1 October 04, 2023
linux, linux-aws, linux-aws-6.2, linux-azure, linux-azure-6.2, linux-azure-fde-6.2, linux-gcp, linux-gcp-6.2, linux-hwe-6.2, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-6.2, linux-oracle, linux-raspi, linux-starfive vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 23.04 - Ubuntu 22.04 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-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-kvm: Linux kernel for cloud environments - linux-lowlatency: Linux low latency kernel - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi: Linux kernel for Raspberry Pi systems - linux-starfive: Linux kernel for StarFive processors - linux-aws-6.2: Linux kernel for Amazon Web Services (AWS) systems - linux-azure-6.2: Linux kernel for Microsoft Azure cloud systems - linux-azure-fde-6.2: Linux kernel for Microsoft Azure CVM cloud systems - linux-gcp-6.2: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe-6.2: Linux hardware enablement (HWE) kernel - linux-lowlatency-hwe-6.2: Linux low latency kernel Details: Hyunwoo Kim discovered that the DVB Core driver in the Linux kernel contained a race condition during device removal, leading to a use-after- free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-45886, CVE-2022-45919) Hyunwoo Kim discovered that the Technotrend/Hauppauge USB DEC driver in the Linux kernel did not properly handle device removal events. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2022-45887) It was discovered that the NTFS file system implementation in the Linux kernel did not properly validate MFT flags in certain situations. An attacker could use this to construct a malicious NTFS image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2022-48425) 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) 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) It was discovered that the KSMBD implementation in the Linux kernel did not properly validate buffer sizes in certain operations, leading to an integer underflow and 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-2023-38427) Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel did not properly validate packet header sizes 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-2023-38431) 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) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 23.04: linux-image-6.2.0-1006-starfive 6.2.0-1006.7 linux-image-6.2.0-1013-aws 6.2.0-1013.13 linux-image-6.2.0-1013-oracle 6.2.0-1013.13 linux-image-6.2.0-1014-azure 6.2.0-1014.14 linux-image-6.2.0-1014-kvm 6.2.0-1014.14 linux-image-6.2.0-1014-lowlatency 6.2.0-1014.14 linux-image-6.2.0-1014-lowlatency-64k 6.2.0-1014.14 linux-image-6.2.0-1014-raspi 6.2.0-1014.16 linux-image-6.2.0-1016-gcp 6.2.0-1016.18 linux-image-6.2.0-34-generic 6.2.0-34.34 linux-image-6.2.0-34-generic-64k 6.2.0-34.34 linux-image-6.2.0-34-generic-lpae 6.2.0-34.34 linux-image-aws 6.2.0.1013.14 linux-image-azure 6.2.0.1014.14 linux-image-gcp 6.2.0.1016.16 linux-image-generic 6.2.0.34.34 linux-image-generic-64k 6.2.0.34.34 linux-image-generic-lpae 6.2.0.34.34 linux-image-kvm 6.2.0.1014.14 linux-image-lowlatency 6.2.0.1014.14 linux-image-lowlatency-64k 6.2.0.1014.14 linux-image-oracle 6.2.0.1013.13 linux-image-raspi 6.2.0.1014.17 linux-image-raspi-nolpae 6.2.0.1014.17 linux-image-starfive 6.2.0.1006.9 linux-image-virtual 6.2.0.34.34 Ubuntu 22.04 LTS: linux-image-6.2.0-1013-aws 6.2.0-1013.13~22.04.1 linux-image-6.2.0-1014-azure 6.2.0-1014.14~22.04.1 linux-image-6.2.0-1014-azure-fde 6.2.0-1014.14~22.04.1.1 linux-image-6.2.0-1014-lowlatency 6.2.0-1014.14~22.04.1 linux-image-6.2.0-1014-lowlatency-64k 6.2.0-1014.14~22.04.1 linux-image-6.2.0-1016-gcp 6.2.0-1016.18~22.04.1 linux-image-6.2.0-34-generic 6.2.0-34.34~22.04.1 linux-image-6.2.0-34-generic-64k 6.2.0-34.34~22.04.1 linux-image-6.2.0-34-generic-lpae 6.2.0-34.34~22.04.1 linux-image-aws 6.2.0.1013.13~22.04.1 linux-image-azure 6.2.0.1014.14~22.04.1 linux-image-azure-fde 6.2.0.1014.14~22.04.1.11 linux-image-gcp 6.2.0.1016.18~22.04.1 linux-image-generic-64k-hwe-22.04 6.2.0.34.34~22.04.11 linux-image-generic-hwe-22.04 6.2.0.34.34~22.04.11 linux-image-generic-lpae-hwe-22.04 6.2.0.34.34~22.04.11 linux-image-lowlatency-64k-hwe-22.04 6.2.0.1014.14~22.04.11 linux-image-lowlatency-hwe-22.04 6.2.0.1014.14~22.04.11 linux-image-virtual-hwe-22.04 6.2.0.34.34~22.04.11 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-6412-1 CVE-2022-45886, CVE-2022-45887, CVE-2022-45919, CVE-2022-48425, CVE-2023-1206, CVE-2023-20569, CVE-2023-2156, CVE-2023-3212, CVE-2023-38427, CVE-2023-38431, CVE-2023-4155, CVE-2023-4194, CVE-2023-4273 Package Information: https://launchpad.net/ubuntu/+source/linux/6.2.0-34.34 https://launchpad.net/ubuntu/+source/linux-aws/6.2.0-1013.13 https://launchpad.net/ubuntu/+source/linux-azure/6.2.0-1014.14 https://launchpad.net/ubuntu/+source/linux-gcp/6.2.0-1016.18 https://launchpad.net/ubuntu/+source/linux-kvm/6.2.0-1014.14 https://launchpad.net/ubuntu/+source/linux-lowlatency/6.2.0-1014.14 https://launchpad.net/ubuntu/+source/linux-oracle/6.2.0-1013.13 https://launchpad.net/ubuntu/+source/linux-raspi/6.2.0-1014.16 https://launchpad.net/ubuntu/+source/linux-starfive/6.2.0-1006.7 https://launchpad.net/ubuntu/+source/linux-aws-6.2/6.2.0-1013.13~22.04.1 https://launchpad.net/ubuntu/+source/linux-azure-6.2/6.2.0-1014.14~22.04.1 https://launchpad.net/ubuntu/+source/linux-azure-fde-6.2/6.2.0-1014.14~22.04.1.1 https://launchpad.net/ubuntu/+source/linux-gcp-6.2/6.2.0-1016.18~22.04.1 https://launchpad.net/ubuntu/+source/linux-hwe-6.2/6.2.0-34.34~22.04.1 https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-6.2/6.2.0-1014.14~22.04.1
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