Stay Secure with the Latest Linux Advisories

security advisorymoderatedenial of service

Ubuntu 20.04 LTS USN-6301-1 Moderate: Kernel Denial Of Service

Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-6301-1 August 17, 2023 linux-hwe-5.4, 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-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors - linux-hwe-5.4: Linux hardware enablement (HWE) kernel Details: It was discovered that the netlink implementation in the Linux kernel did not properly validate policies when parsing attributes in some situations. An attacker could use this to cause a denial of service (infinite recursion). (CVE-2020-36691) Billy Jheng Bing Jhong discovered that the CIFS network file system implementation in the Linux kernel did not properly validate arguments to ioctl() in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-0168) It was discovered that the ext4 file system implementation in the Linux kernel contained a use-after-free vulnerability. An attacker could use this to construct a malicious ext4 file system image that, when mounted, could cause a denial of service (system crash). (CVE-2022-1184) It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. (CVE-2022-27672) William Zhao discovered that the Traffic Control (TC) subsystem in the Linux kernel did not properly handle network packet retransmission in certain situations. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2022-4269) It was discovered that arace condition existed in the qdisc implementation 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-2023-0590) It was discovered that a race condition existed in the btrfs file system implementation 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 expose sensitive information. (CVE-2023-1611) It was discovered that the APM X-Gene SoC hardware monitoring driver in the Linux kernel contained a race condition, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information (kernel memory). (CVE-2023-1855) It was discovered that the ST NCI NFC driver did not properly handle device removal events. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2023-1990) It was discovered that the XFS file system implementation in the Linux kernel did not properly perform metadata validation when mounting certain images. An attacker could use this to specially craft a file system image that, when mounted, could cause a denial of service (system crash). (CVE-2023-2124) It was discovered that the SLIMpro I2C device driver in the Linux kernel did not properly validate user-supplied data in some situations, leading to an out-of-bounds write vulnerability. A privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-2194) It was discovered that a race condition existed in the TLS subsystem in the Linux kernel, leading to a use-after-free or 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-2023-28466) It was discovered that the DA9150 charger driver in theLinux kernel did not properly handle device removal, leading to a user-after free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-30772) It was discovered that the btrfs file system implementation in the Linux kernel did not properly handle error conditions in some situations, leading to a use-after-free vulnerability. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2023-3111) It was discovered that the Ricoh R5C592 MemoryStick card reader driver in the Linux kernel contained a race condition during module unload, 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-2023-3141) It was discovered that the Qualcomm EMAC ethernet driver in the Linux kernel did not properly handle device removal, leading to a user-after free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-33203) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.4.0-1027-xilinx-zynqmp 5.4.0-1027.31 linux-image-xilinx-zynqmp 5.4.0.1027.29 Ubuntu 18.04 LTS (Available with Ubuntu Pro): linux-image-5.4.0-156-generic 5.4.0-156.173~18.04.1 linux-image-5.4.0-156-generic-lpae 5.4.0-156.173~18.04.1 linux-image-5.4.0-156-lowlatency 5.4.0-156.173~18.04.1 linux-image-generic-hwe-18.04 5.4.0.156.173~18.04.126 linux-image-generic-lpae-hwe-18.04 5.4.0.156.173~18.04.126 linux-image-lowlatency-hwe-18.04 5.4.0.156.173~18.04.126 linux-image-oem 5.4.0.156.173~18.04.126 linux-image-oem-osp1 5.4.0.156.173~18.04.126 linux-image-snapdragon-hwe-18.04 5.4.0.156.173~18.04.126 linux-image-virtual-hwe-18.04 5.4.0.156.173~18.04.126 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-6301-1 CVE-2020-36691, CVE-2022-0168, CVE-2022-1184, CVE-2022-27672, CVE-2022-4269, CVE-2023-0590, CVE-2023-1611, CVE-2023-1855, CVE-2023-1990, CVE-2023-2124, CVE-2023-2194, CVE-2023-28466, CVE-2023-30772, CVE-2023-3111, CVE-2023-3141, CVE-2023-33203 Package Information: https://launchpad.net/ubuntu/+source/linux-xilinx-zynqmp/5.4.0-1027.31 . Various security enhancements included in the Linux kernel patch for Ubuntu tackle significant vulnerabilities prevalent in numerous platforms.. Linux Kernel Update, Ubuntu Security Notice, Kernel Fixes, Denial of Service, System Update. . LinuxSecurity.com Team

Aug 17, 2023 Ubuntu