[USN-5003-1] Linux kernel vulnerabilities

========================================================================== 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
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
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 linux-image-azure-lts-18.04 linux-image-dell300x linux-image-gcp-lts-18.04 linux-image-generic linux-image-generic-lpae linux-image-lowlatency linux-image-oracle-lts-18.04 linux-image-raspi2 linux-image-snapdragon linux-image-virtual
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 linux-image-azure linux-image-gcp linux-image-generic-hwe-16.04 linux-image-gke linux-image-lowlatency-hwe-16.04 linux-image-oem linux-image-oracle linux-image-virtual-hwe-16.04
Ubuntu 14.04 ESM: linux-image-4.15.0-1118-azure 4.15.0-1118.131~14.04.1 linux-image-azure
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: ubuntu.com/security/notices/USN-5003-1 CVE-2021-23133, CVE-2021-3600, CVE-2021-3609
Package Information: launchpad.net/ubuntu/+source/linux/4.15.0-147.151 launchpad.net/ubuntu/+source/linux-aws/4.15.0-1106.113 launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1118.131 launchpad.net/ubuntu/+source/linux-dell300x/4.15.0-1022.26 launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1103.116 launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1075.83 launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1089.94 launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1106.115