=========================================================================Ubuntu Security Notice USN-4879-1
March 16, 2021

linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm,
linux-oracle, linux-raspi vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS

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: 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 (V8) systems
- linux-hwe-5.8: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the Marvell WiFi-Ex device driver in the Linux
kernel did not properly validate ad-hoc SSIDs. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2020-36158)

Loris Reiff discovered that the BPF implementation in the Linux kernel did
not properly validate attributes in the getsockopt BPF hook. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2021-20194)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
  linux-image-5.8.0-1017-raspi    5.8.0-1017.20
  linux-image-5.8.0-1017-raspi-nolpae  5.8.0-1017.20
  linux-image-5.8.0-1020-kvm      5.8.0-1020.22
  linux-image-5.8.0-1022-oracle   5.8.0-1022.23
  linux-image-5.8.0-1024-azure    5.8.0-1024.26
  linux-image-5.8.0-1024-gcp      5.8.0-1024.25
  linux-image-5.8.0-1025-aws      5.8.0-1025.27
  linux-image-5.8.0-45-generic    5.8.0-45.51
  linux-image-5.8.0-45-generic-64k  5.8.0-45.51
  linux-image-5.8.0-45-generic-lpae  5.8.0-45.51
  linux-image-5.8.0-45-lowlatency  5.8.0-45.51
  linux-image-aws                 5.8.0.1025.27
  linux-image-azure               5.8.0.1024.24
  linux-image-gcp                 5.8.0.1024.24
  linux-image-generic             5.8.0.45.50
  linux-image-generic-64k         5.8.0.45.50
  linux-image-generic-lpae        5.8.0.45.50
  linux-image-gke                 5.8.0.1024.24
  linux-image-kvm                 5.8.0.1020.22
  linux-image-lowlatency          5.8.0.45.50
  linux-image-oem-20.04           5.8.0.45.50
  linux-image-oracle              5.8.0.1022.21
  linux-image-raspi               5.8.0.1017.20
  linux-image-raspi-nolpae        5.8.0.1017.20
  linux-image-virtual             5.8.0.45.50

Ubuntu 20.04 LTS:
  linux-image-5.8.0-45-generic    5.8.0-45.51~20.04.1+1
  linux-image-5.8.0-45-generic-64k  5.8.0-45.51~20.04.1+1
  linux-image-5.8.0-45-generic-lpae  5.8.0-45.51~20.04.1
  linux-image-5.8.0-45-lowlatency  5.8.0-45.51~20.04.1+1
  linux-image-generic-64k-hwe-20.04  5.8.0.45.51~20.04.31
  linux-image-generic-hwe-20.04   5.8.0.45.51~20.04.31
  linux-image-generic-lpae-hwe-20.04  5.8.0.45.51~20.04.31
  linux-image-lowlatency-hwe-20.04  5.8.0.45.51~20.04.31
  linux-image-virtual-hwe-20.04   5.8.0.45.51~20.04.31

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-4879-1
  CVE-2020-36158, CVE-2021-20194

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.8.0-45.51
  https://launchpad.net/ubuntu/+source/linux-aws/5.8.0-1025.27
  https://launchpad.net/ubuntu/+source/linux-azure/5.8.0-1024.26
  https://launchpad.net/ubuntu/+source/linux-gcp/5.8.0-1024.25
  https://launchpad.net/ubuntu/+source/linux-kvm/5.8.0-1020.22
  https://launchpad.net/ubuntu/+source/linux-oracle/5.8.0-1022.23
  https://launchpad.net/ubuntu/+source/linux-raspi/5.8.0-1017.20
  https://launchpad.net/ubuntu/+source/linux-hwe-5.8/5.8.0-45.51~20.04.1

Ubuntu 4879-1: Linux kernel vulnerabilities

March 16, 2021
Several security issues were fixed in the Linux kernel.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10: linux-image-5.8.0-1017-raspi 5.8.0-1017.20 linux-image-5.8.0-1017-raspi-nolpae 5.8.0-1017.20 linux-image-5.8.0-1020-kvm 5.8.0-1020.22 linux-image-5.8.0-1022-oracle 5.8.0-1022.23 linux-image-5.8.0-1024-azure 5.8.0-1024.26 linux-image-5.8.0-1024-gcp 5.8.0-1024.25 linux-image-5.8.0-1025-aws 5.8.0-1025.27 linux-image-5.8.0-45-generic 5.8.0-45.51 linux-image-5.8.0-45-generic-64k 5.8.0-45.51 linux-image-5.8.0-45-generic-lpae 5.8.0-45.51 linux-image-5.8.0-45-lowlatency 5.8.0-45.51 linux-image-aws 5.8.0.1025.27 linux-image-azure 5.8.0.1024.24 linux-image-gcp 5.8.0.1024.24 linux-image-generic 5.8.0.45.50 linux-image-generic-64k 5.8.0.45.50 linux-image-generic-lpae 5.8.0.45.50 linux-image-gke 5.8.0.1024.24 linux-image-kvm 5.8.0.1020.22 linux-image-lowlatency 5.8.0.45.50 linux-image-oem-20.04 5.8.0.45.50 linux-image-oracle 5.8.0.1022.21 linux-image-raspi 5.8.0.1017.20 linux-image-raspi-nolpae 5.8.0.1017.20 linux-image-virtual 5.8.0.45.50 Ubuntu 20.04 LTS: linux-image-5.8.0-45-generic 5.8.0-45.51~20.04.1+1 linux-image-5.8.0-45-generic-64k 5.8.0-45.51~20.04.1+1 linux-image-5.8.0-45-generic-lpae 5.8.0-45.51~20.04.1 linux-image-5.8.0-45-lowlatency 5.8.0-45.51~20.04.1+1 linux-image-generic-64k-hwe-20.04 5.8.0.45.51~20.04.31 linux-image-generic-hwe-20.04 5.8.0.45.51~20.04.31 linux-image-generic-lpae-hwe-20.04 5.8.0.45.51~20.04.31 linux-image-lowlatency-hwe-20.04 5.8.0.45.51~20.04.31 linux-image-virtual-hwe-20.04 5.8.0.45.51~20.04.31 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-4879-1

CVE-2020-36158, CVE-2021-20194

Severity
March 16, 2021

Package Information

https://launchpad.net/ubuntu/+source/linux/5.8.0-45.51 https://launchpad.net/ubuntu/+source/linux-aws/5.8.0-1025.27 https://launchpad.net/ubuntu/+source/linux-azure/5.8.0-1024.26 https://launchpad.net/ubuntu/+source/linux-gcp/5.8.0-1024.25 https://launchpad.net/ubuntu/+source/linux-kvm/5.8.0-1020.22 https://launchpad.net/ubuntu/+source/linux-oracle/5.8.0-1022.23 https://launchpad.net/ubuntu/+source/linux-raspi/5.8.0-1017.20 https://launchpad.net/ubuntu/+source/linux-hwe-5.8/5.8.0-45.51~20.04.1

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