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AUSCERT External Security Bulletin Redistribution
ESB-2020.3067
USN-4489-1: Linux kernel vulnerability
9 September 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Linux Kernel
Publisher: Ubuntu
Operating System: Ubuntu
Linux variants
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Root Compromise -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-14386
Original Bulletin:
https://usn.ubuntu.com/4489-1/
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running Linux Kernel check for an updated version of the software
for their operating system.
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USN-4489-1: Linux kernel vulnerability
08 September 2020
The system could be made to crash or run programs as an administrator.
Releases
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o Ubuntu 14.04 ESM
Packages
o linux - Linux kernel
o linux-aws - Linux kernel for Amazon Web Services (AWS) systems
o linux-aws-5.3 - Linux kernel for Amazon Web Services (AWS) systems
o linux-aws-5.4 - Linux kernel for Amazon Web Services (AWS) systems
o linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
o linux-azure - Linux kernel for Microsoft Azure Cloud systems
o linux-azure-4.15 - Linux kernel for Microsoft Azure Cloud systems
o linux-azure-5.4 - Linux kernel for Microsoft Azure cloud systems
o linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
o linux-gcp-4.15 - Linux kernel for Google Cloud Platform (GCP) systems
o linux-gcp-5.4 - Linux kernel for Google Cloud Platform (GCP) systems
o linux-gke-4.15 - Linux kernel for Google Container Engine (GKE) systems
o linux-gke-5.0 - Linux kernel for Google Container Engine (GKE) systems
o linux-gke-5.3 - Linux kernel for Google Container Engine (GKE) systems
o linux-hwe - Linux hardware enablement (HWE) kernel
o linux-hwe-5.4 - Linux hardware enablement (HWE) kernel
o linux-kvm - Linux kernel for cloud environments
o linux-oem - Linux kernel for OEM systems
o linux-oem-osp1 - Linux kernel for OEM systems
o linux-oracle - Linux kernel for Oracle Cloud systems
o linux-oracle-5.4 - Linux kernel for Oracle Cloud systems
o linux-raspi - Linux kernel for Raspberry Pi (V8) systems
o linux-raspi-5.4 - Linux kernel for Raspberry Pi (V8) systems
o linux-raspi2 - Linux kernel for Raspberry Pi (V8) systems
o linux-raspi2-5.3 - Linux kernel for Raspberry Pi (V8) systems
o 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
o linux-image-5.4.0-1018-raspi - 5.4.0-1018.20
o linux-image-5.4.0-1024-aws - 5.4.0-1024.24
o linux-image-5.4.0-1024-gcp - 5.4.0-1024.24
o linux-image-5.4.0-1024-oracle - 5.4.0-1024.24
o linux-image-5.4.0-1025-azure - 5.4.0-1025.25
o linux-image-5.4.0-47-generic - 5.4.0-47.51
o linux-image-5.4.0-47-generic-lpae - 5.4.0-47.51
o linux-image-5.4.0-47-lowlatency - 5.4.0-47.51
o linux-image-aws - 5.4.0.1024.25
o linux-image-azure - 5.4.0.1025.24
o linux-image-gcp - 5.4.0.1024.21
o linux-image-generic - 5.4.0.47.50
o linux-image-generic-lpae - 5.4.0.47.50
o linux-image-gke - 5.4.0.1024.21
o linux-image-kvm - 5.4.0.1023.21
o linux-image-lowlatency - 5.4.0.47.50
o linux-image-oem - 5.4.0.47.50
o linux-image-oem-osp1 - 5.4.0.47.50
o linux-image-oracle - 5.4.0.1024.21
o linux-image-raspi - 5.4.0.1018.53
o linux-image-raspi2 - 5.4.0.1018.53
o linux-image-virtual - 5.4.0.47.50
Ubuntu 18.04
o linux-image-4.15.0-1053-oracle - 4.15.0-1053.57
o linux-image-4.15.0-1069-gke - 4.15.0-1069.72
o linux-image-4.15.0-1070-raspi2 - 4.15.0-1070.74
o linux-image-4.15.0-1074-kvm - 4.15.0-1074.75
o linux-image-4.15.0-1082-aws - 4.15.0-1082.86
o linux-image-4.15.0-1083-gcp - 4.15.0-1083.94
o linux-image-4.15.0-1086-snapdragon - 4.15.0-1086.94
o linux-image-4.15.0-1095-azure - 4.15.0-1095.105
o linux-image-4.15.0-1096-oem - 4.15.0-1096.106
o linux-image-4.15.0-117-generic - 4.15.0-117.118
o linux-image-4.15.0-117-generic-lpae - 4.15.0-117.118
o linux-image-4.15.0-117-lowlatency - 4.15.0-117.118
o linux-image-5.0.0-1047-gke - 5.0.0-1047.48
o linux-image-5.0.0-1068-oem-osp1 - 5.0.0-1068.73
o linux-image-5.3.0-1033-raspi2 - 5.3.0-1033.35
o linux-image-5.3.0-1035-aws - 5.3.0-1035.37
o linux-image-5.3.0-1036-gke - 5.3.0-1036.38
o linux-image-5.3.0-67-generic - 5.3.0-67.61
o linux-image-5.3.0-67-lowlatency - 5.3.0-67.61
o linux-image-5.4.0-1018-raspi - 5.4.0-1018.20~18.04.1
o linux-image-5.4.0-1024-aws - 5.4.0-1024.24~18.04.1
o linux-image-5.4.0-1024-gcp - 5.4.0-1024.24~18.04.1
o linux-image-5.4.0-1024-oracle - 5.4.0-1024.24~18.04.1
o linux-image-5.4.0-1025-azure - 5.4.0-1025.25~18.04.1
o linux-image-5.4.0-47-generic - 5.4.0-47.51~18.04.1
o linux-image-5.4.0-47-generic-lpae - 5.4.0-47.51~18.04.1
o linux-image-5.4.0-47-lowlatency - 5.4.0-47.51~18.04.1
o linux-image-aws - 5.3.0.1035.34
o linux-image-aws-lts-18.04 - 4.15.0.1082.84
o linux-image-azure - 5.4.0.1025.8
o linux-image-azure-lts-18.04 - 4.15.0.1095.68
o linux-image-gcp - 5.4.0.1024.11
o linux-image-gcp-lts-18.04 - 4.15.0.1083.101
o linux-image-generic - 4.15.0.117.104
o linux-image-generic-hwe-18.04 - 5.4.0.47.51~18.04.40
o linux-image-generic-lpae - 4.15.0.117.104
o linux-image-generic-lpae-hwe-18.04 - 5.4.0.47.51~18.04.40
o linux-image-gke - 4.15.0.1069.73
o linux-image-gke-4.15 - 4.15.0.1069.73
o linux-image-gke-5.0 - 5.0.0.1047.32
o linux-image-gke-5.3 - 5.3.0.1036.20
o linux-image-gke-5.4 - 5.4.0.1024.11
o linux-image-gkeop-5.3 - 5.3.0.67.124
o linux-image-gkeop-5.4 - 5.4.0.47.51~18.04.40
o linux-image-kvm - 4.15.0.1074.70
o linux-image-lowlatency - 4.15.0.117.104
o linux-image-lowlatency-hwe-18.04 - 5.4.0.47.51~18.04.40
o linux-image-oem - 4.15.0.1096.100
o linux-image-oem-osp1 - 5.0.0.1068.66
o linux-image-oracle - 5.4.0.1024.8
o linux-image-oracle-lts-18.04 - 4.15.0.1053.63
o linux-image-powerpc-e500mc - 4.15.0.117.104
o linux-image-powerpc-smp - 4.15.0.117.104
o linux-image-powerpc64-emb - 4.15.0.117.104
o linux-image-powerpc64-smp - 4.15.0.117.104
o linux-image-raspi-hwe-18.04 - 5.4.0.1018.22
o linux-image-raspi2 - 4.15.0.1070.67
o linux-image-raspi2-hwe-18.04 - 5.3.0.1033.23
o linux-image-snapdragon - 4.15.0.1086.89
o linux-image-snapdragon-hwe-18.04 - 5.4.0.47.51~18.04.40
o linux-image-virtual - 4.15.0.117.104
o linux-image-virtual-hwe-18.04 - 5.4.0.47.51~18.04.40
Ubuntu 16.04
o linux-image-4.15.0-1053-oracle - 4.15.0-1053.57~16.04.1
o linux-image-4.15.0-1082-aws - 4.15.0-1082.86~16.04.1
o linux-image-4.15.0-1083-gcp - 4.15.0-1083.94~16.04.1
o linux-image-4.15.0-1095-azure - 4.15.0-1095.105~16.04.1
o linux-image-4.15.0-117-generic - 4.15.0-117.118~16.04.1
o linux-image-4.15.0-117-generic-lpae - 4.15.0-117.118~16.04.1
o linux-image-4.15.0-117-lowlatency - 4.15.0-117.118~16.04.1
o linux-image-aws-hwe - 4.15.0.1082.78
o linux-image-azure - 4.15.0.1095.89
o linux-image-gcp - 4.15.0.1083.84
o linux-image-generic-hwe-16.04 - 4.15.0.117.118
o linux-image-generic-lpae-hwe-16.04 - 4.15.0.117.118
o linux-image-gke - 4.15.0.1083.84
o linux-image-lowlatency-hwe-16.04 - 4.15.0.117.118
o linux-image-oem - 4.15.0.117.118
o linux-image-oracle - 4.15.0.1053.43
o linux-image-virtual-hwe-16.04 - 4.15.0.117.118
Ubuntu 14.04
o linux-image-4.15.0-1095-azure - 4.15.0-1095.105~14.04.1
o linux-image-azure - 4.15.0.1095.71
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
o CVE-2020-14386
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