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Ubuntu 20.04/18.04 USN-6131-1 Moderate: Kernel Crash Risks Addressed

Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-6131-1 June 01, 2023 linux, linux-aws, 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 vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 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-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-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 Details: Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in the netfilter subsystem of the Linux kernel when processing batch requests, 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-2023-32233) Gwangun Jung discovered that the Quick Fair Queueing scheduler implementation in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial ofservice (system crash) or possibly execute arbitrary code. (CVE-2023-31436) Reima Ishii discovered that the nested KVM implementation for Intel x86 processors in the Linux kernel did not properly validate control registers in certain situations. An attacker in a guest VM could use this to cause a denial of service (guest crash). (CVE-2023-30456) It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux kernel did not properly perform data buffer size validation in some situations. A physically proximate attacker could use this to craft a malicious USB device that when inserted, could cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-1380) Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu Linux kernel contained a race condition when handling inode locking in some situations. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2023-2612) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.4.0-1050-ibm 5.4.0-1050.55 linux-image-5.4.0-1070-gkeop 5.4.0-1070.74 linux-image-5.4.0-1092-kvm 5.4.0-1092.98 linux-image-5.4.0-1100-gke 5.4.0-1100.107 linux-image-5.4.0-1102-oracle 5.4.0-1102.111 linux-image-5.4.0-1103-aws 5.4.0-1103.111 linux-image-5.4.0-1106-gcp 5.4.0-1106.115 linux-image-5.4.0-1109-azure 5.4.0-1109.115 linux-image-5.4.0-150-generic 5.4.0-150.167 linux-image-5.4.0-150-generic-lpae 5.4.0-150.167 linux-image-5.4.0-150-lowlatency 5.4.0-150.167 linux-image-aws-lts-20.04 5.4.0.1103.100 linux-image-azure-lts-20.04 5.4.0.1109.102 linux-image-gcp-lts-20.04 5.4.0.1106.108 linux-image-generic 5.4.0.150.148 linux-image-generic-lpae 5.4.0.150.148 linux-image-gke 5.4.0.1100.105 linux-image-gke-5.4 5.4.0.1100.105 linux-image-gkeop 5.4.0.1070.68 linux-image-gkeop-5.4 5.4.0.1070.68 linux-image-ibm 5.4.0.1050.76 linux-image-ibm-lts-20.04 5.4.0.1050.76 linux-image-kvm 5.4.0.1092.87 linux-image-lowlatency 5.4.0.150.148 linux-image-oem 5.4.0.150.148 linux-image-oem-osp1 5.4.0.150.148 linux-image-oracle-lts-20.04 5.4.0.1102.95 linux-image-virtual 5.4.0.150.148 Ubuntu 18.04 LTS: linux-image-5.4.0-1050-ibm 5.4.0-1050.55~18.04.1 linux-image-5.4.0-1102-oracle 5.4.0-1102.111~18.04.1 linux-image-5.4.0-1106-gcp 5.4.0-1106.115~18.04.1 linux-image-5.4.0-1109-azure 5.4.0-1109.115~18.04.1 linux-image-5.4.0-150-generic 5.4.0-150.167~18.04.1 linux-image-5.4.0-150-generic-lpae 5.4.0-150.167~18.04.1 linux-image-5.4.0-150-lowlatency 5.4.0-150.167~18.04.1 linux-image-azure 5.4.0.1109.82 linux-image-gcp 5.4.0.1106.82 linux-image-generic-hwe-18.04 5.4.0.150.167~18.04.121 linux-image-generic-lpae-hwe-18.04 5.4.0.150.167~18.04.121 linux-image-ibm 5.4.0.1050.61 linux-image-lowlatency-hwe-18.04 5.4.0.150.167~18.04.121 linux-image-oem 5.4.0.150.167~18.04.121 linux-image-oem-osp1 5.4.0.150.167~18.04.121 linux-image-oracle 5.4.0.1102.111~18.04.74 linux-image-snapdragon-hwe-18.04 5.4.0.150.167~18.04.121 linux-image-virtual-hwe-18.04 5.4.0.150.167~18.04.121 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 systemupgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-6131-1 CVE-2023-1380, CVE-2023-2612, CVE-2023-30456, CVE-2023-31436, CVE-2023-32233 Package Information: https://launchpad.net/ubuntu/+source/linux/5.4.0-150.167 https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1103.111 https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1109.115 https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1106.115 https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1100.107 https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1070.74 https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1050.55 https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1092.98 https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1102.111 https://launchpad.net/ubuntu/+source/linux-azure-5.4/5.4.0-1109.115~18.04.1 https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1106.115~18.04.1 https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-150.167~18.04.1 https://launchpad.net/ubuntu/+source/linux-ibm-5.4/5.4.0-1050.55~18.04.1 https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1102.111~18.04.1 . The recent security bulletin USN-6132-2 highlights critical vulnerabilities within the kernel affecting various Ubuntu versions, necessitating immediate updates.. Linux Kernel Update, Ubuntu Security Advisory, System Vulnerability, Denial Of Service, Linux Patch Management. . Severity: Important. LinuxSecurity.com Team

Jun 01, 2023 •Important Ubuntu