Ubuntu Security Notices
USN-4489-1

USN-4489-1: Linux kernel vulnerability

Publication date

8 September 2020

Overview

The system could be made to crash or run programs as an administrator.

Releases

20.04 LTS 18.04 LTS 16.04 LTS 14.04 LTS

Packages

linux - Linux kernel
linux-aws - Linux kernel for Amazon Web Services (AWS) systems
linux-aws-5.3 - Linux kernel for Amazon Web Services (AWS) systems
linux-aws-5.4 - Linux kernel for Amazon Web Services (AWS) systems
linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
linux-azure - Linux kernel for Microsoft Azure Cloud systems
linux-azure-4.15 - Linux kernel for Microsoft Azure Cloud systems
linux-azure-5.4 - Linux kernel for Microsoft Azure cloud systems
linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
linux-gcp-4.15 - Linux kernel for Google Cloud Platform (GCP) systems
linux-gcp-5.4 - Linux kernel for Google Cloud Platform (GCP) systems
linux-gke-4.15 - Linux kernel for Google Container Engine (GKE) systems
linux-gke-5.0 - Linux kernel for Google Container Engine (GKE) systems
linux-gke-5.3 - Linux kernel for Google Container Engine (GKE) systems
linux-hwe - Linux hardware enablement (HWE) kernel
linux-hwe-5.4 - Linux hardware enablement (HWE) kernel
linux-kvm - Linux kernel for cloud environments
linux-oem - Linux kernel for OEM systems
linux-oem-osp1 - Linux kernel for OEM systems
linux-oracle - Linux kernel for Oracle Cloud systems
linux-oracle-5.4 - Linux kernel for Oracle Cloud systems
linux-raspi - Linux kernel for Raspberry Pi (V8) systems
linux-raspi-5.4 - Linux kernel for Raspberry Pi (V8) systems
linux-raspi2 - Linux kernel for Raspberry Pi (V8) systems
linux-raspi2-5.3 - Linux kernel for Raspberry Pi (V8) systems
linux-snapdragon - Linux kernel for Qualcomm Snapdragon processors

Details

Or Cohen discovered that the AF_PACKET implementation in the Linux
kernel did not properly perform bounds checking in some situations. A
local attacker could use this to cause a denial of service (system
crash) or possibly execute arbitrary code.

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release	Package Version
20.04 focal	linux-image-5.4.0-1018-raspi – 5.4.0-1018.20
	linux-image-5.4.0-1024-aws – 5.4.0-1024.24
	linux-image-5.4.0-1024-gcp – 5.4.0-1024.24
	linux-image-5.4.0-1024-oracle – 5.4.0-1024.24
	linux-image-5.4.0-1025-azure – 5.4.0-1025.25
	linux-image-5.4.0-47-generic – 5.4.0-47.51
	linux-image-5.4.0-47-generic-lpae – 5.4.0-47.51
	linux-image-5.4.0-47-lowlatency – 5.4.0-47.51
	linux-image-aws – 5.4.0.1024.25
	linux-image-azure – 5.4.0.1025.24
	linux-image-gcp – 5.4.0.1024.21
	linux-image-generic – 5.4.0.47.50
	linux-image-generic-lpae – 5.4.0.47.50
	linux-image-gke – 5.4.0.1024.21
	linux-image-kvm – 5.4.0.1023.21
	linux-image-lowlatency – 5.4.0.47.50
	linux-image-oem – 5.4.0.47.50
	linux-image-oem-osp1 – 5.4.0.47.50
	linux-image-oracle – 5.4.0.1024.21
	linux-image-raspi – 5.4.0.1018.53
	linux-image-raspi2 – 5.4.0.1018.53
	linux-image-virtual – 5.4.0.47.50
18.04 bionic	linux-image-4.15.0-1053-oracle – 4.15.0-1053.57
	linux-image-4.15.0-1069-gke – 4.15.0-1069.72
	linux-image-4.15.0-1070-raspi2 – 4.15.0-1070.74
	linux-image-4.15.0-1074-kvm – 4.15.0-1074.75
	linux-image-4.15.0-1082-aws – 4.15.0-1082.86
	linux-image-4.15.0-1083-gcp – 4.15.0-1083.94
	linux-image-4.15.0-1086-snapdragon – 4.15.0-1086.94
	linux-image-4.15.0-1095-azure – 4.15.0-1095.105
	linux-image-4.15.0-1096-oem – 4.15.0-1096.106
	linux-image-4.15.0-117-generic – 4.15.0-117.118
	linux-image-4.15.0-117-generic-lpae – 4.15.0-117.118
	linux-image-4.15.0-117-lowlatency – 4.15.0-117.118
	linux-image-5.0.0-1047-gke – 5.0.0-1047.48
	linux-image-5.0.0-1068-oem-osp1 – 5.0.0-1068.73
	linux-image-5.3.0-1033-raspi2 – 5.3.0-1033.35
	linux-image-5.3.0-1035-aws – 5.3.0-1035.37
	linux-image-5.3.0-1036-gke – 5.3.0-1036.38
	linux-image-5.3.0-67-generic – 5.3.0-67.61
	linux-image-5.3.0-67-lowlatency – 5.3.0-67.61
	linux-image-5.4.0-1018-raspi – 5.4.0-1018.20~18.04.1
	linux-image-5.4.0-1024-aws – 5.4.0-1024.24~18.04.1
	linux-image-5.4.0-1024-gcp – 5.4.0-1024.24~18.04.1
	linux-image-5.4.0-1024-oracle – 5.4.0-1024.24~18.04.1
	linux-image-5.4.0-1025-azure – 5.4.0-1025.25~18.04.1
	linux-image-5.4.0-47-generic – 5.4.0-47.51~18.04.1
	linux-image-5.4.0-47-generic-lpae – 5.4.0-47.51~18.04.1
	linux-image-5.4.0-47-lowlatency – 5.4.0-47.51~18.04.1
	linux-image-aws – 5.3.0.1035.34
	linux-image-aws-lts-18.04 – 4.15.0.1082.84
	linux-image-azure – 5.4.0.1025.8
	linux-image-azure-lts-18.04 – 4.15.0.1095.68
	linux-image-gcp – 5.4.0.1024.11
	linux-image-gcp-lts-18.04 – 4.15.0.1083.101
	linux-image-generic – 4.15.0.117.104
	linux-image-generic-hwe-18.04 – 5.4.0.47.51~18.04.40
	linux-image-generic-lpae – 4.15.0.117.104
	linux-image-generic-lpae-hwe-18.04 – 5.4.0.47.51~18.04.40
	linux-image-gke – 4.15.0.1069.73
	linux-image-gke-4.15 – 4.15.0.1069.73
	linux-image-gke-5.0 – 5.0.0.1047.32
	linux-image-gke-5.3 – 5.3.0.1036.20
	linux-image-gke-5.4 – 5.4.0.1024.11
	linux-image-gkeop-5.3 – 5.3.0.67.124
	linux-image-gkeop-5.4 – 5.4.0.47.51~18.04.40
	linux-image-kvm – 4.15.0.1074.70
	linux-image-lowlatency – 4.15.0.117.104
	linux-image-lowlatency-hwe-18.04 – 5.4.0.47.51~18.04.40
	linux-image-oem – 4.15.0.1096.100
	linux-image-oem-osp1 – 5.0.0.1068.66
	linux-image-oracle – 5.4.0.1024.8
	linux-image-oracle-lts-18.04 – 4.15.0.1053.63
	linux-image-raspi-hwe-18.04 – 5.4.0.1018.22
	linux-image-raspi2 – 4.15.0.1070.67
	linux-image-raspi2-hwe-18.04 – 5.3.0.1033.23
	linux-image-snapdragon – 4.15.0.1086.89
	linux-image-snapdragon-hwe-18.04 – 5.4.0.47.51~18.04.40
	linux-image-virtual – 4.15.0.117.104
	linux-image-virtual-hwe-18.04 – 5.4.0.47.51~18.04.40
16.04 xenial	linux-image-4.15.0-1053-oracle – 4.15.0-1053.57~16.04.1
	linux-image-4.15.0-1082-aws – 4.15.0-1082.86~16.04.1
	linux-image-4.15.0-1083-gcp – 4.15.0-1083.94~16.04.1
	linux-image-4.15.0-1095-azure – 4.15.0-1095.105~16.04.1
	linux-image-4.15.0-117-generic – 4.15.0-117.118~16.04.1
	linux-image-4.15.0-117-generic-lpae – 4.15.0-117.118~16.04.1
	linux-image-4.15.0-117-lowlatency – 4.15.0-117.118~16.04.1
	linux-image-aws-hwe – 4.15.0.1082.78
	linux-image-azure – 4.15.0.1095.89
	linux-image-gcp – 4.15.0.1083.84
	linux-image-generic-hwe-16.04 – 4.15.0.117.118
	linux-image-generic-lpae-hwe-16.04 – 4.15.0.117.118
	linux-image-gke – 4.15.0.1083.84
	linux-image-lowlatency-hwe-16.04 – 4.15.0.117.118
	linux-image-oem – 4.15.0.117.118
	linux-image-oracle – 4.15.0.1053.43
	linux-image-virtual-hwe-16.04 – 4.15.0.117.118
14.04 trusty	linux-image-4.15.0-1095-azure – 4.15.0-1095.105~14.04.1
14.04 trusty	linux-image-azure – 4.15.0.1095.71

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References

CVE-2020-14386

CVE-2020-14386

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