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Ubuntu 22.04 LTS, 20.04 LTS USN-5976-1 Critical: Kernel DoS Fixes

Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-5976-1 March 27, 2023 linux-oem-5.14, linux-oem-5.17 vulnerabilities ========================================================================= 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-oem-5.17: Linux kernel for OEM systems - linux-oem-5.14: Linux kernel for OEM systems Details: It was discovered that the Upper Level Protocol (ULP) subsystem in the Linux kernel did not properly handle sockets entering the LISTEN state in certain protocols, 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-2023-0461) It was discovered that the KVM VMX implementation in the Linux kernel did not properly handle indirect branch prediction isolation between L1 and L2 VMs. An attacker in a guest VM could use this to expose sensitive information from the host OS or other guest VMs. (CVE-2022-2196) It was discovered that the Intel 740 frame buffer driver in the Linux kernel contained a divide by zero vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2022-3061) It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux kernel did not properly perform bounds checking 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 execute arbitrary code. (CVE-2022-3628) Ziming Zhang discovered that the VMware Virtual GPU DRM driver in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (systemcrash). (CVE-2022-36280) It was discovered that the NILFS2 file system implementation in the Linux kernel did not properly deallocate memory in certain error conditions. An attacker could use this to cause a denial of service (memory exhaustion). (CVE-2022-3646) Khalid Masum discovered that the NILFS2 file system implementation in the Linux kernel did not properly handle certain error conditions, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2022-3649) It was discovered that a race condition existed in the Roccat HID driver in the Linux kernel, 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-2022-41850) Kyle Zeng discovered that the IPv6 implementation in the Linux kernel contained a NULL pointer dereference vulnerability in certain situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-0394) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.17.0-1029-oem 5.17.0-1029.30 linux-image-oem-22.04 5.17.0.1029.27 linux-image-oem-22.04a 5.17.0.1029.27 Ubuntu 20.04 LTS: linux-image-5.14.0-1059-oem 5.14.0-1059.67 linux-image-oem-20.04 5.14.0.1059.57 linux-image-oem-20.04b 5.14.0.1059.57 linux-image-oem-20.04c 5.14.0.1059.57 linux-image-oem-20.04d 5.14.0.1059.57 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-5976-1 CVE-2022-2196, CVE-2022-3061, CVE-2022-3628, CVE-2022-36280, CVE-2022-3646, CVE-2022-3649, CVE-2022-41850, CVE-2023-0394, CVE-2023-0461 Package Information: https://launchpad.net/ubuntu/+source/linux-oem-5.17/5.17.0-1029.30 https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1059.67 . Numerous vulnerabilities addressed within the Linux core impacting Ubuntu versions 20.04 and 22.04. Prompt updates are essential.. Linux Kernel Security, Ubuntu Kernel Update, OEM Vulnerability Management. . Severity: Critical. LinuxSecurity.com Team

Mar 27, 2023 •Critical Ubuntu