========================================================================= Ubuntu Security Notice USN-5003-1 June 23, 2021 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-dell300x, linux-gcp, linux-gcp-4.15, linux-hwe, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS - Ubuntu 16.04 ESM - Ubuntu 14.04 ESM 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-4.15: Linux kernel for Microsoft Azure Cloud systems - linux-dell300x: Linux kernel for Dell 300x platforms - linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi2: Linux kernel for Raspberry Pi (V8) systems - linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors - linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe: Linux hardware enablement (HWE) kernel Details: Norbert Slusarek discovered a race condition in the CAN BCM networking protocol of the Linux kernel leading to multiple use-after-free vulnerabilities. A local attacker could use this issue to execute arbitrary code. (CVE-2021-3609) It was discovered that the eBPF implementation in the Linux kernel did not properly track bounds information for 32 bit registers when performing div and mod operations. A local attacker could use this to possibly execute arbitrary code. (CVE-2021-3600) Or Cohen discovered that the SCTP implementation in the Linux kernel contained a race condition in some situations, leading to a use-after-free condition. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-23133) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-4.15.0-1022-dell300x 4.15.0-1022.26 linux-image-4.15.0-1075-oracle 4.15.0-1075.83 linux-image-4.15.0-1089-raspi2 4.15.0-1089.94 linux-image-4.15.0-1103-gcp 4.15.0-1103.116 linux-image-4.15.0-1106-aws 4.15.0-1106.113 linux-image-4.15.0-1106-snapdragon 4.15.0-1106.115 linux-image-4.15.0-1118-azure 4.15.0-1118.131 linux-image-4.15.0-147-generic 4.15.0-147.151 linux-image-4.15.0-147-generic-lpae 4.15.0-147.151 linux-image-4.15.0-147-lowlatency 4.15.0-147.151 linux-image-aws-lts-18.04 4.15.0.1106.109 linux-image-azure-lts-18.04 4.15.0.1118.91 linux-image-dell300x 4.15.0.1022.24 linux-image-gcp-lts-18.04 4.15.0.1103.121 linux-image-generic 4.15.0.147.134 linux-image-generic-lpae 4.15.0.147.134 linux-image-lowlatency 4.15.0.147.134 linux-image-oracle-lts-18.04 4.15.0.1075.85 linux-image-raspi2 4.15.0.1089.86 linux-image-snapdragon 4.15.0.1106.109 linux-image-virtual 4.15.0.147.134 Ubuntu 16.04 ESM: linux-image-4.15.0-1075-oracle 4.15.0-1075.83~16.04.1 linux-image-4.15.0-1103-gcp 4.15.0-1103.116~16.04.1 linux-image-4.15.0-1106-aws 4.15.0-1106.113~16.04.1 linux-image-4.15.0-1118-azure 4.15.0-1118.131~16.04.1 linux-image-4.15.0-147-generic 4.15.0-147.151~16.04.1 linux-image-4.15.0-147-lowlatency 4.15.0-147.151~16.04.1 linux-image-aws-hwe 4.15.0.1106.97 linux-image-azure 4.15.0.1118.109 linux-image-gcp 4.15.0.1103.104 linux-image-generic-hwe-16.04 4.15.0.147.143 linux-image-gke 4.15.0.1103.104 linux-image-lowlatency-hwe-16.04 4.15.0.147.143 linux-image-oem 4.15.0.147.143 linux-image-oracle 4.15.0.1075.63 linux-image-virtual-hwe-16.04 4.15.0.147.143 Ubuntu 14.04 ESM: linux-image-4.15.0-1118-azure 4.15.0-1118.131~14.04.1 linux-image-azure 4.15.0.1118.91 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-5003-1 CVE-2021-23133, CVE-2021-3600, CVE-2021-3609 Package Information: https://launchpad.net/ubuntu/+source/linux/4.15.0-147.151 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1106.113 https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1118.131 https://launchpad.net/ubuntu/+source/linux-dell300x/4.15.0-1022.26 https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1103.116 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1075.83 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1089.94 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1106.115