[USN-5162-1] Linux kernel vulnerabilities

========================================================================== Ubuntu Security Notice USN-5162-1 November 30, 2021
linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oem-5.13, linux-oracle, linux-raspi vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.10 – Ubuntu 20.04 LTS
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-kvm: Linux kernel for cloud environments – linux-oracle: Linux kernel for Oracle Cloud systems – linux-raspi: Linux kernel for Raspberry Pi systems – linux-oem-5.13: Linux kernel for OEM systems
Ilja Van Sprundel discovered that the SCTP implementation in the Linux kernel did not properly perform size validations on incoming packets in some situations. An attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2021-3655)
It was discovered that the AMD Cryptographic Coprocessor (CCP) driver in the Linux kernel did not properly deallocate memory in some error conditions. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3744, CVE-2021-3764)
It was discovered that the Aspeed Low Pin Count (LPC) Bus Controller implementation in the Linux kernel did not properly perform boundary checks in some situations, allowing out-of-bounds write access. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. In Ubuntu, this issue only affected systems running armhf kernels. (CVE-2021-42252)
Jann Horn discovered that the SELinux subsystem in the Linux kernel did not properly handle subjective credentials for tasks in some situations. On systems where SELinux has been enabled, a local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-43057)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10: linux-image-5.13.0-1006-kvm 5.13.0-1006.6 linux-image-5.13.0-1007-aws 5.13.0-1007.8 linux-image-5.13.0-1007-gcp 5.13.0-1007.8 linux-image-5.13.0-1008-azure 5.13.0-1008.9 linux-image-5.13.0-1010-oracle 5.13.0-1010.12 linux-image-5.13.0-1011-raspi 5.13.0-1011.13 linux-image-5.13.0-1011-raspi-nolpae 5.13.0-1011.13 linux-image-5.13.0-22-generic 5.13.0-22.22 linux-image-5.13.0-22-generic-64k 5.13.0-22.22 linux-image-5.13.0-22-generic-lpae 5.13.0-22.22 linux-image-5.13.0-22-lowlatency 5.13.0-22.22 linux-image-aws linux-image-azure linux-image-gcp linux-image-generic linux-image-generic-64k linux-image-generic-lpae linux-image-gke linux-image-kvm linux-image-lowlatency linux-image-oem-20.04 linux-image-oracle linux-image-raspi linux-image-raspi-nolpae linux-image-virtual
Ubuntu 20.04 LTS: linux-image-5.13.0-1020-oem 5.13.0-1020.24 linux-image-oem-20.04c
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-5162-1 CVE-2021-3655, CVE-2021-3744, CVE-2021-3764, CVE-2021-42252, CVE-2021-43057
Package Information: launchpad.net/ubuntu/+source/linux/5.13.0-22.22 launchpad.net/ubuntu/+source/linux-aws/5.13.0-1007.8 launchpad.net/ubuntu/+source/linux-azure/5.13.0-1008.9 launchpad.net/ubuntu/+source/linux-gcp/5.13.0-1007.8 launchpad.net/ubuntu/+source/linux-kvm/5.13.0-1006.6 launchpad.net/ubuntu/+source/linux-oracle/5.13.0-1010.12 launchpad.net/ubuntu/+source/linux-raspi/5.13.0-1011.13 launchpad.net/ubuntu/+source/linux-oem-5.13/5.13.0-1020.24