USN-4489-1: Linux kernel vulnerability

08 September 2020

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

Releases

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

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

Ubuntu 20.04

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

Ubuntu 18.04

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-powerpc-e500mc - 4.15.0.117.104
linux-image-powerpc-smp - 4.15.0.117.104
linux-image-powerpc64-emb - 4.15.0.117.104
linux-image-powerpc64-smp - 4.15.0.117.104
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

Ubuntu 16.04

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

Ubuntu 14.04

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

CVE-2020-14386

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Canonical is offering Extended Security Maintenance

Canonical is offering Ubuntu 14.04 Extended Security Maintenance (ESM) for security fixes and essential packages.

Find out more about ESM