Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2021.0920
USN-4876-1: Linux kernel vulnerabilities
17 March 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Unauthorised Access -- Existing Account
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-20239 CVE-2021-20194 CVE-2021-3347
CVE-2021-3178 CVE-2020-36158 CVE-2020-29569
Reference: ESB-2021.0837
ESB-2021.0717
ESB-2021.0648
Original Bulletin:
https://ubuntu.com/security/notices/USN-4876-1
https://ubuntu.com/security/notices/USN-4877-1
https://ubuntu.com/security/notices/USN-4878-1
https://ubuntu.com/security/notices/USN-4879-1
Comment: This bulletin contains four (4) Ubuntu security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-4876-1: Linux kernel vulnerabilities
16 March 2021
Several security issues were fixed in the Linux kernel.
Releases
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-kvm - Linux kernel for cloud environments
o linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
o linux-raspi2 - Linux kernel for Raspberry Pi (V8) systems
o linux-snapdragon - Linux kernel for Qualcomm Snapdragon processors
Details
Olivier Benjamin and Pawel Wieczorkiewicz discovered a race condition the
Xen paravirt block backend in the Linux kernel, leading to a use-after-free
vulnerability. An attacker in a guest VM could use this to cause a denial
of service in the host OS. ( CVE-2020-29569 )
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 )
discovered that the NFS implementation in the Linux kernel did not
properly prevent access outside of an NFS export that is a subdirectory of
a file system. An attacker could possibly use this to bypass NFS access
restrictions. ( CVE-2021-3178 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 16.04
o linux-image-4.4.0-204-lowlatency - 4.4.0-204.236
o linux-image-powerpc-e500mc - 4.4.0.204.210
o linux-image-4.4.0-1089-kvm - 4.4.0-1089.98
o linux-image-4.4.0-204-generic - 4.4.0-204.236
o linux-image-4.4.0-204-powerpc-smp - 4.4.0-204.236
o linux-image-4.4.0-1123-aws - 4.4.0-1123.137
o linux-image-4.4.0-1151-snapdragon - 4.4.0-1151.161
o linux-image-4.4.0-1147-raspi2 - 4.4.0-1147.157
o linux-image-snapdragon - 4.4.0.1151.143
o linux-image-powerpc64-emb - 4.4.0.204.210
o linux-image-virtual - 4.4.0.204.210
o linux-image-generic - 4.4.0.204.210
o linux-image-4.4.0-204-generic-lpae - 4.4.0-204.236
o linux-image-aws - 4.4.0.1123.128
o linux-image-kvm - 4.4.0.1089.87
o linux-image-raspi2 - 4.4.0.1147.147
o linux-image-powerpc-smp - 4.4.0.204.210
o linux-image-4.4.0-204-powerpc64-emb - 4.4.0-204.236
o linux-image-4.4.0-204-powerpc-e500mc - 4.4.0-204.236
o linux-image-generic-lpae - 4.4.0.204.210
o linux-image-4.4.0-204-powerpc64-smp - 4.4.0-204.236
o linux-image-powerpc64-smp - 4.4.0.204.210
o linux-image-lowlatency - 4.4.0.204.210
Ubuntu 14.04
o linux-image-4.4.0-1087-aws - 4.4.0-1087.91
o linux-image-4.4.0-204-generic - 4.4.0-204.236~14.04.1
o linux-image-4.4.0-204-powerpc-smp - 4.4.0-204.236~14.04.1
o linux-image-4.4.0-204-powerpc-e500mc - 4.4.0-204.236~14.04.1
o linux-image-4.4.0-204-lowlatency - 4.4.0-204.236~14.04.1
o linux-image-lowlatency-lts-xenial - 4.4.0.204.178
o linux-image-4.4.0-204-generic-lpae - 4.4.0-204.236~14.04.1
o linux-image-powerpc-e500mc-lts-xenial - 4.4.0.204.178
o linux-image-generic-lpae-lts-xenial - 4.4.0.204.178
o linux-image-powerpc64-smp-lts-xenial - 4.4.0.204.178
o linux-image-powerpc-smp-lts-xenial - 4.4.0.204.178
o linux-image-powerpc64-emb-lts-xenial - 4.4.0.204.178
o linux-image-generic-lts-xenial - 4.4.0.204.178
o linux-image-aws - 4.4.0.1087.84
o linux-image-4.4.0-204-powerpc64-smp - 4.4.0-204.236~14.04.1
o linux-image-virtual-lts-xenial - 4.4.0.204.178
o linux-image-4.4.0-204-powerpc64-emb - 4.4.0-204.236~14.04.1
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-2020-29569
o CVE-2021-3178
o CVE-2020-36158
Related notices
o USN-4877-1 : linux-image-generic-lpae, linux-image-virtual,
linux-image-4.15.0-137-lowlatency, linux-image-4.15.0-1013-dell300x,
linux-image-raspi2, linux-dell300x, linux-image-azure-lts-18.04,
linux-image-4.15.0-1086-kvm, linux-image-powerpc-e500mc,
linux-image-4.15.0-1066-oracle, linux-aws-hwe,
linux-image-4.15.0-1080-raspi2, linux-image-gcp, linux-image-generic,
linux-image-aws-hwe, linux-image-oem, linux-image-oracle, linux-oracle,
linux, linux-image-4.15.0-137-generic-lpae, linux-kvm, linux-image-azure,
linux-raspi2, linux-image-gcp-lts-18.04, linux-azure, linux-hwe,
linux-image-powerpc64-emb, linux-image-kvm, linux-image-generic-hwe-16.04,
linux-image-gke, linux-image-4.15.0-1094-gcp, linux-image-aws-lts-18.04,
linux-image-dell300x, linux-azure-4.15, linux-snapdragon, linux-gcp-4.15,
linux-image-4.15.0-1109-azure, linux-image-lowlatency,
linux-image-lowlatency-hwe-16.04, linux-image-snapdragon, linux-gcp,
linux-aws, linux-image-4.15.0-1095-aws, linux-image-4.15.0-137-generic,
linux-image-generic-lpae-hwe-16.04, linux-image-virtual-hwe-16.04,
linux-image-powerpc-smp, linux-image-oracle-lts-18.04,
linux-image-powerpc64-smp, linux-image-4.15.0-1097-snapdragon
o USN-4751-1 : linux-image-generic-lpae, linux-image-5.8.0-1019-kvm,
linux-image-5.8.0-44-generic-lpae, linux-image-virtual,
linux-image-lowlatency-hwe-20.04, linux-image-5.8.0-1023-azure,
linux-image-5.8.0-1024-aws, linux-image-gcp, linux-image-5.8.0-1016-raspi,
linux-image-generic, linux-image-generic-64k-hwe-20.04,
linux-image-5.8.0-44-generic-64k, linux-image-aws, linux-image-oracle,
linux-image-generic-64k, linux-raspi, linux-oracle, linux,
linux-image-generic-hwe-20.04, linux-kvm, linux-image-5.8.0-44-generic,
linux-image-azure, linux-image-virtual-hwe-20.04, linux-hwe-5.8,
linux-image-5.8.0-1016-raspi-nolpae, linux-image-generic-lpae-hwe-20.04,
linux-azure, linux-image-kvm, linux-image-gke, linux-image-raspi,
linux-image-5.8.0-1021-oracle, linux-image-lowlatency,
linux-image-5.8.0-44-lowlatency, linux-image-oem-20.04, linux-gcp,
linux-aws, linux-image-5.8.0-1023-gcp, linux-image-raspi-nolpae
o USN-4750-1 : linux-hwe-5.4, linux-image-generic-lpae, linux-gkeop-5.4,
linux-image-virtual, linux-image-raspi2, linux-azure-5.4,
linux-image-gkeop, linux-image-5.4.0-66-generic,
linux-image-5.4.0-1036-gke, linux-gcp-5.4,
linux-image-snapdragon-hwe-18.04, linux-image-5.4.0-1010-gkeop,
linux-image-gcp, linux-image-generic, linux-image-oem, linux-image-aws,
linux-image-oracle, linux-image-5.4.0-1040-azure, linux-raspi,
linux-image-raspi-hwe-18.04, linux-oracle, linux,
linux-image-5.4.0-1037-gcp, linux-kvm, linux-image-azure,
linux-image-virtual-hwe-18.04, linux-image-gkeop-5.4, linux-azure,
linux-image-5.4.0-66-lowlatency, linux-image-kvm,
linux-image-generic-hwe-18.04, linux-image-raspi, linux-aws-5.4,
linux-image-lowlatency, linux-image-lowlatency-hwe-18.04, linux-raspi-5.4,
linux-image-oem-osp1, linux-gke-5.4, linux-gcp, linux-aws,
linux-image-5.4.0-1038-aws, linux-gkeop, linux-oracle-5.4,
linux-image-5.4.0-1038-oracle, linux-image-5.4.0-1033-kvm,
linux-image-5.4.0-1029-raspi, linux-image-5.4.0-66-generic-lpae,
linux-image-gke-5.4, linux-image-generic-lpae-hwe-18.04
o USN-4749-1 : linux-image-generic-lpae, linux-image-4.15.0-136-generic,
linux-image-4.15.0-136-generic-lpae, linux-image-4.15.0-1079-raspi2,
linux-image-virtual, linux-image-raspi2, linux-dell300x,
linux-image-4.15.0-1093-gcp, linux-image-azure-lts-18.04,
linux-image-4.15.0-1096-snapdragon, linux-image-4.15.0-136-lowlatency,
linux-image-powerpc-e500mc, linux-aws-hwe, linux-image-gke-4.15,
linux-image-gcp, linux-image-generic, linux-image-aws-hwe, linux-image-oem,
linux-image-oracle, linux-oracle, linux-image-4.15.0-1079-gke, linux,
linux-kvm, linux-image-azure, linux-raspi2,
linux-image-4.15.0-1012-dell300x, linux-image-gcp-lts-18.04,
linux-image-4.15.0-1108-azure, linux-azure, linux-hwe,
linux-image-powerpc64-emb, linux-image-kvm, linux-image-generic-hwe-16.04,
linux-image-gke, linux-image-aws-lts-18.04, linux-snapdragon,
linux-image-dell300x, linux-azure-4.15, linux-gcp-4.15,
linux-image-lowlatency, linux-image-lowlatency-hwe-16.04,
linux-image-4.15.0-1094-aws, linux-image-4.15.0-1085-kvm, linux-gke-4.15,
linux-image-snapdragon, linux-gcp, linux-aws,
linux-image-4.15.0-1065-oracle, linux-image-generic-lpae-hwe-16.04,
linux-image-virtual-hwe-16.04, linux-image-powerpc-smp,
linux-image-oracle-lts-18.04, linux-image-powerpc64-smp
o USN-4878-1 : linux-hwe-5.4, linux-image-generic-lpae, linux-gkeop-5.4,
linux-image-virtual, linux-image-raspi2, linux-azure-5.4,
linux-image-gkeop, linux-image-5.4.0-1030-raspi,
linux-image-5.4.0-1041-azure, linux-image-5.4.0-67-generic-lpae,
linux-image-5.4.0-1039-aws, linux-gcp-5.4,
linux-image-snapdragon-hwe-18.04, linux-image-gcp,
linux-image-5.4.0-67-generic, linux-image-5.4.0-67-lowlatency,
linux-image-generic, linux-image-5.4.0-1011-gkeop, linux-image-oem,
linux-image-aws, linux-image-azure-edge, linux-image-oracle, linux-raspi,
linux-image-raspi-hwe-18.04, linux-oracle, linux, linux-kvm,
linux-image-azure, linux-image-virtual-hwe-18.04, linux-image-gkeop-5.4,
linux-azure, linux-image-kvm, linux-image-generic-hwe-18.04,
linux-image-raspi, linux-image-5.4.0-1034-kvm, linux-aws-5.4,
linux-image-lowlatency, linux-image-lowlatency-hwe-18.04, linux-raspi-5.4,
linux-image-oem-osp1, linux-image-5.4.0-1039-oracle, linux-gke-5.4,
linux-image-5.4.0-1037-gke, linux-image-5.4.0-1038-gcp, linux-gcp,
linux-aws, linux-gkeop, linux-oracle-5.4, linux-image-aws-edge,
linux-image-gcp-edge, linux-image-gke-5.4,
linux-image-generic-lpae-hwe-18.04
o USN-4879-1 : linux-image-generic-lpae, linux-image-5.8.0-1022-oracle,
linux-image-virtual, linux-image-5.8.0-45-generic-64k,
linux-image-lowlatency-hwe-20.04, linux-image-5.8.0-1020-kvm,
linux-image-gcp, linux-image-5.8.0-1024-gcp, linux-image-generic,
linux-image-5.8.0-1024-azure, linux-image-generic-64k-hwe-20.04,
linux-image-aws, linux-image-oracle, linux-image-5.8.0-45-generic,
linux-image-generic-64k, linux-raspi, linux-oracle,
linux-image-5.8.0-45-lowlatency, linux, linux-image-generic-hwe-20.04,
linux-kvm, linux-image-virtual-hwe-20.04, linux-image-azure, linux-hwe-5.8,
linux-image-5.8.0-45-generic-lpae, linux-image-generic-lpae-hwe-20.04,
linux-azure, linux-image-kvm, linux-image-gke, linux-image-raspi,
linux-image-5.8.0-1025-aws, linux-image-5.8.0-1017-raspi-nolpae,
linux-image-lowlatency, linux-image-oem-20.04, linux-gcp, linux-aws,
linux-image-5.8.0-1017-raspi, linux-image-raspi-nolpae
- --------------------------------------------------------------------------------
USN-4877-1: Linux kernel vulnerabilities
16 March 2021
Several security issues were fixed in the Linux kernel.
Releases
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-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-dell300x - Linux kernel for Dell 300x platforms
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-hwe - Linux hardware enablement (HWE) kernel
o linux-kvm - Linux kernel for cloud environments
o linux-oracle - Linux kernel for Oracle Cloud systems
o linux-raspi2 - Linux kernel for Raspberry Pi (V8) systems
o linux-snapdragon - Linux kernel for Qualcomm Snapdragon processors
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 )
discovered that the NFS implementation in the Linux kernel did not
properly prevent access outside of an NFS export that is a subdirectory of
a file system. An attacker could possibly use this to bypass NFS access
restrictions. ( CVE-2021-3178 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04
o linux-image-4.15.0-1066-oracle - 4.15.0-1066.74
o linux-image-4.15.0-137-lowlatency - 4.15.0-137.141
o linux-image-4.15.0-1080-raspi2 - 4.15.0-1080.85
o linux-image-powerpc-e500mc - 4.15.0.137.124
o linux-image-gcp-lts-18.04 - 4.15.0.1094.112
o linux-image-oracle-lts-18.04 - 4.15.0.1066.76
o linux-image-4.15.0-1109-azure - 4.15.0-1109.121
o linux-image-virtual - 4.15.0.137.124
o linux-image-snapdragon - 4.15.0.1097.100
o linux-image-4.15.0-1095-aws - 4.15.0-1095.102
o linux-image-powerpc64-emb - 4.15.0.137.124
o linux-image-dell300x - 4.15.0.1013.15
o linux-image-aws-lts-18.04 - 4.15.0.1095.98
o linux-image-generic - 4.15.0.137.124
o linux-image-4.15.0-1013-dell300x - 4.15.0-1013.17
o linux-image-4.15.0-1086-kvm - 4.15.0-1086.88
o linux-image-kvm - 4.15.0.1086.82
o linux-image-4.15.0-1094-gcp - 4.15.0-1094.107
o linux-image-raspi2 - 4.15.0.1080.77
o linux-image-azure-lts-18.04 - 4.15.0.1109.82
o linux-image-powerpc-smp - 4.15.0.137.124
o linux-image-4.15.0-137-generic - 4.15.0-137.141
o linux-image-4.15.0-1097-snapdragon - 4.15.0-1097.106
o linux-image-generic-lpae - 4.15.0.137.124
o linux-image-4.15.0-137-generic-lpae - 4.15.0-137.141
o linux-image-powerpc64-smp - 4.15.0.137.124
o linux-image-lowlatency - 4.15.0.137.124
Ubuntu 16.04
o linux-image-gke - 4.15.0.1094.95
o linux-image-4.15.0-1066-oracle - 4.15.0-1066.74~16.04.1
o linux-image-4.15.0-137-generic - 4.15.0-137.141~16.04.1
o linux-image-virtual-hwe-16.04 - 4.15.0.137.133
o linux-image-oracle - 4.15.0.1066.54
o linux-image-4.15.0-1094-gcp - 4.15.0-1094.107~16.04.1
o linux-image-gcp - 4.15.0.1094.95
o linux-image-lowlatency-hwe-16.04 - 4.15.0.137.133
o linux-image-4.15.0-1109-azure - 4.15.0-1109.121~16.04.1
o linux-image-4.15.0-137-generic-lpae - 4.15.0-137.141~16.04.1
o linux-image-generic-hwe-16.04 - 4.15.0.137.133
o linux-image-4.15.0-137-lowlatency - 4.15.0-137.141~16.04.1
o linux-image-generic-lpae-hwe-16.04 - 4.15.0.137.133
o linux-image-oem - 4.15.0.137.133
o linux-image-4.15.0-1095-aws - 4.15.0-1095.102~16.04.1
o linux-image-azure - 4.15.0.1109.100
o linux-image-aws-hwe - 4.15.0.1095.88
Ubuntu 14.04
o linux-image-azure - 4.15.0.1109.82
o linux-image-4.15.0-1109-azure - 4.15.0-1109.121~14.04.1
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-2021-3178
o CVE-2020-36158
Related notices
o USN-4878-1 : linux-hwe-5.4, linux-image-generic-lpae, linux-gkeop-5.4,
linux-image-virtual, linux-image-raspi2, linux-azure-5.4,
linux-image-gkeop, linux-image-5.4.0-1030-raspi,
linux-image-5.4.0-1041-azure, linux-image-5.4.0-67-generic-lpae,
linux-image-5.4.0-1039-aws, linux-gcp-5.4,
linux-image-snapdragon-hwe-18.04, linux-image-gcp,
linux-image-5.4.0-67-generic, linux-image-5.4.0-67-lowlatency,
linux-image-generic, linux-image-5.4.0-1011-gkeop, linux-image-oem,
linux-image-aws, linux-image-azure-edge, linux-image-oracle, linux-raspi,
linux-image-raspi-hwe-18.04, linux-oracle, linux, linux-kvm,
linux-image-azure, linux-image-virtual-hwe-18.04, linux-image-gkeop-5.4,
linux-azure, linux-image-kvm, linux-image-generic-hwe-18.04,
linux-image-raspi, linux-image-5.4.0-1034-kvm, linux-aws-5.4,
linux-image-lowlatency, linux-image-lowlatency-hwe-18.04, linux-raspi-5.4,
linux-image-oem-osp1, linux-image-5.4.0-1039-oracle, linux-gke-5.4,
linux-image-5.4.0-1037-gke, linux-image-5.4.0-1038-gcp, linux-gcp,
linux-aws, linux-gkeop, linux-oracle-5.4, linux-image-aws-edge,
linux-image-gcp-edge, linux-image-gke-5.4,
linux-image-generic-lpae-hwe-18.04
o USN-4879-1 : linux-image-generic-lpae, linux-image-5.8.0-1022-oracle,
linux-image-virtual, linux-image-5.8.0-45-generic-64k,
linux-image-lowlatency-hwe-20.04, linux-image-5.8.0-1020-kvm,
linux-image-gcp, linux-image-5.8.0-1024-gcp, linux-image-generic,
linux-image-5.8.0-1024-azure, linux-image-generic-64k-hwe-20.04,
linux-image-aws, linux-image-oracle, linux-image-5.8.0-45-generic,
linux-image-generic-64k, linux-raspi, linux-oracle,
linux-image-5.8.0-45-lowlatency, linux, linux-image-generic-hwe-20.04,
linux-kvm, linux-image-virtual-hwe-20.04, linux-image-azure, linux-hwe-5.8,
linux-image-5.8.0-45-generic-lpae, linux-image-generic-lpae-hwe-20.04,
linux-azure, linux-image-kvm, linux-image-gke, linux-image-raspi,
linux-image-5.8.0-1025-aws, linux-image-5.8.0-1017-raspi-nolpae,
linux-image-lowlatency, linux-image-oem-20.04, linux-gcp, linux-aws,
linux-image-5.8.0-1017-raspi, linux-image-raspi-nolpae
o USN-4876-1 : linux-image-4.4.0-204-generic-lpae, linux-image-generic-lpae,
linux-image-virtual, linux-image-4.4.0-204-powerpc-smp, linux-image-raspi2,
linux-image-virtual-lts-xenial, linux-image-4.4.0-1087-aws,
linux-image-4.4.0-1151-snapdragon, linux-image-powerpc-e500mc-lts-xenial,
linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-204-powerpc64-smp,
linux-image-powerpc-e500mc, linux-image-powerpc64-smp,
linux-image-4.4.0-204-generic, linux-image-generic, linux-image-aws,
linux-lts-xenial, linux, linux-image-lowlatency-lts-xenial, linux-kvm,
linux-image-4.4.0-204-lowlatency, linux-raspi2,
linux-image-powerpc64-smp-lts-xenial, linux-image-powerpc64-emb,
linux-image-kvm, linux-snapdragon, linux-image-4.4.0-204-powerpc64-emb,
linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-1147-raspi2,
linux-image-lowlatency, linux-image-generic-lts-xenial,
linux-image-snapdragon, linux-aws, linux-image-4.4.0-1089-kvm,
linux-image-4.4.0-204-powerpc-e500mc, linux-image-4.4.0-1123-aws,
linux-image-powerpc-smp, linux-image-powerpc64-emb-lts-xenial
- --------------------------------------------------------------------------------
USN-4878-1: Linux kernel vulnerabilities
16 March 2021
Several security issues were fixed in the Linux kernel.
Releases
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
Packages
o linux - Linux kernel
o linux-aws - Linux kernel for Amazon Web Services (AWS) systems
o linux-aws-5.4 - Linux kernel for Amazon Web Services (AWS) systems
o linux-azure - 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-5.4 - Linux kernel for Google Cloud Platform (GCP) systems
o linux-gke-5.4 - Linux kernel for Google Container Engine (GKE) systems
o linux-gkeop - Linux kernel for Google Container Engine (GKE) systems
o linux-gkeop-5.4 - Linux kernel for Google Container Engine (GKE) systems
o linux-hwe-5.4 - Linux hardware enablement (HWE) kernel
o linux-kvm - Linux kernel for cloud environments
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
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 )
Ryota Shiga discovered that the sockopt BPF hooks in the Linux kernel could
allow a user space program to probe for valid kernel addresses. A local
attacker could use this to ease exploitation of another kernel
vulnerability. ( CVE-2021-20239 )
It was discovered that the priority inheritance futex implementation in the
Linux kernel contained a race condition, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. ( CVE-2021-3347 )
discovered that the NFS implementation in the Linux kernel did not
properly prevent access outside of an NFS export that is a subdirectory of
a file system. An attacker could possibly use this to bypass NFS access
restrictions. ( CVE-2021-3178 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.04
o linux-image-gkeop-5.4 - 5.4.0.1011.14
o linux-image-5.4.0-1030-raspi - 5.4.0-1030.33
o linux-image-5.4.0-1039-oracle - 5.4.0-1039.42
o linux-image-5.4.0-1041-azure - 5.4.0-1041.43
o linux-image-oem-osp1 - 5.4.0.67.70
o linux-image-5.4.0-1011-gkeop - 5.4.0-1011.12
o linux-image-oracle - 5.4.0.1039.36
o linux-image-azure - 5.4.0.1041.39
o linux-image-gkeop - 5.4.0.1011.14
o linux-image-5.4.0-67-generic - 5.4.0-67.75
o linux-image-5.4.0-1039-aws - 5.4.0-1039.41
o linux-image-virtual - 5.4.0.67.70
o linux-image-raspi - 5.4.0.1030.65
o linux-image-5.4.0-1038-gcp - 5.4.0-1038.41
o linux-image-generic - 5.4.0.67.70
o linux-image-oem - 5.4.0.67.70
o linux-image-aws - 5.4.0.1039.40
o linux-image-kvm - 5.4.0.1034.32
o linux-image-raspi2 - 5.4.0.1030.65
o linux-image-generic-lpae - 5.4.0.67.70
o linux-image-gcp - 5.4.0.1038.47
o linux-image-5.4.0-67-lowlatency - 5.4.0-67.75
o linux-image-5.4.0-1034-kvm - 5.4.0-1034.35
o linux-image-lowlatency - 5.4.0.67.70
o linux-image-5.4.0-67-generic-lpae - 5.4.0-67.75
Ubuntu 18.04
o linux-image-gkeop-5.4 - 5.4.0.1011.12~18.04.12
o linux-image-5.4.0-1030-raspi - 5.4.0-1030.33~18.04.1
o linux-image-5.4.0-1039-oracle - 5.4.0-1039.42~18.04.1
o linux-image-5.4.0-1041-azure - 5.4.0-1041.43~18.04.1
o linux-image-oem-osp1 - 5.4.0.67.75~18.04.62
o linux-image-5.4.0-1011-gkeop - 5.4.0-1011.12~18.04.2
o linux-image-oracle - 5.4.0.1039.42~18.04.22
o linux-image-generic-hwe-18.04 - 5.4.0.67.75~18.04.62
o linux-image-azure - 5.4.0.1041.21
o linux-image-snapdragon-hwe-18.04 - 5.4.0.67.75~18.04.62
o linux-image-aws-edge - 5.4.0.1039.23
o linux-image-generic-lpae-hwe-18.04 - 5.4.0.67.75~18.04.62
o linux-image-5.4.0-67-generic - 5.4.0-67.75~18.04.1
o linux-image-5.4.0-1038-gcp - 5.4.0-1038.41~18.04.1
o linux-image-azure-edge - 5.4.0.1041.21
o linux-image-lowlatency-hwe-18.04 - 5.4.0.67.75~18.04.62
o linux-image-virtual-hwe-18.04 - 5.4.0.67.75~18.04.62
o linux-image-gke-5.4 - 5.4.0.1037.39~18.04.5
o linux-image-oem - 5.4.0.67.75~18.04.62
o linux-image-aws - 5.4.0.1039.23
o linux-image-gcp-edge - 5.4.0.1038.25
o linux-image-raspi-hwe-18.04 - 5.4.0.1030.33
o linux-image-gcp - 5.4.0.1038.25
o linux-image-5.4.0-67-lowlatency - 5.4.0-67.75~18.04.1
o linux-image-5.4.0-1039-aws - 5.4.0-1039.41~18.04.1
o linux-image-5.4.0-1037-gke - 5.4.0-1037.39~18.04.1
o linux-image-5.4.0-67-generic-lpae - 5.4.0-67.75~18.04.1
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-2021-3347
o CVE-2021-3178
o CVE-2020-36158
o CVE-2021-20239
Related notices
o USN-4877-1 : linux-gcp-4.15, linux-image-4.15.0-1109-azure,
linux-image-generic-lpae-hwe-16.04, linux-image-4.15.0-1097-snapdragon,
linux-snapdragon, linux-image-4.15.0-1086-kvm, linux-dell300x,
linux-image-gcp, linux-image-snapdragon, linux-azure, linux-image-gke,
linux-image-4.15.0-1013-dell300x, linux-image-lowlatency-hwe-16.04,
linux-hwe, linux-image-virtual, linux-image-4.15.0-1066-oracle,
linux-image-4.15.0-137-generic, linux-aws, linux,
linux-image-4.15.0-1095-aws, linux-image-aws-hwe, linux-image-dell300x,
linux-image-azure-lts-18.04, linux-image-4.15.0-1094-gcp, linux-azure-4.15,
linux-image-4.15.0-137-lowlatency, linux-image-generic,
linux-image-virtual-hwe-16.04, linux-image-aws-lts-18.04, linux-kvm,
linux-image-4.15.0-137-generic-lpae, linux-image-powerpc64-smp,
linux-image-azure, linux-image-powerpc64-emb, linux-image-powerpc-e500mc,
linux-aws-hwe, linux-image-4.15.0-1080-raspi2, linux-image-oem,
linux-image-kvm, linux-image-oracle, linux-image-raspi2,
linux-image-gcp-lts-18.04, linux-image-generic-hwe-16.04,
linux-image-lowlatency, linux-image-generic-lpae,
linux-image-oracle-lts-18.04, linux-oracle, linux-gcp, linux-raspi2,
linux-image-powerpc-smp
o USN-4879-1 : linux-image-raspi, linux-image-5.8.0-1022-oracle,
linux-image-gcp, linux-image-5.8.0-45-lowlatency, linux-azure,
linux-image-gke, linux-image-generic-lpae-hwe-20.04,
linux-image-5.8.0-1024-azure, linux-image-virtual,
linux-image-5.8.0-1024-gcp, linux-image-oem-20.04,
linux-image-raspi-nolpae, linux-hwe-5.8, linux-image-5.8.0-45-generic,
linux-aws, linux, linux-image-5.8.0-45-generic-lpae,
linux-image-5.8.0-1025-aws, linux-image-generic-64k-hwe-20.04,
linux-image-virtual-hwe-20.04, linux-image-5.8.0-1017-raspi-nolpae,
linux-image-generic, linux-image-5.8.0-45-generic-64k,
linux-image-5.8.0-1020-kvm, linux-kvm, linux-image-5.8.0-1017-raspi,
linux-raspi, linux-image-azure, linux-image-lowlatency-hwe-20.04,
linux-image-generic-hwe-20.04, linux-image-generic-64k, linux-image-kvm,
linux-image-oracle, linux-image-lowlatency, linux-image-aws,
linux-image-generic-lpae, linux-oracle, linux-gcp
o USN-4876-1 : linux-image-generic-lpae-lts-xenial,
linux-image-virtual-lts-xenial, linux-image-powerpc-e500mc-lts-xenial,
linux-snapdragon, linux-image-4.4.0-1123-aws,
linux-image-4.4.0-204-powerpc-smp, linux-image-lowlatency-lts-xenial,
linux-image-powerpc-smp-lts-xenial, linux-image-snapdragon,
linux-image-4.4.0-1151-snapdragon, linux-image-virtual, linux-aws, linux,
linux-image-generic, linux-image-4.4.0-204-powerpc64-smp, linux-kvm,
linux-image-4.4.0-1089-kvm, linux-image-powerpc64-smp-lts-xenial,
linux-image-powerpc64-smp, linux-image-4.4.0-1087-aws,
linux-image-powerpc64-emb-lts-xenial, linux-lts-xenial,
linux-image-4.4.0-204-powerpc-e500mc, linux-image-4.4.0-204-generic,
linux-image-powerpc64-emb, linux-image-powerpc-e500mc,
linux-image-4.4.0-204-generic-lpae, linux-image-4.4.0-1147-raspi2,
linux-image-kvm, linux-image-raspi2, linux-image-4.4.0-204-powerpc64-emb,
linux-image-lowlatency, linux-image-aws, linux-image-generic-lpae,
linux-image-4.4.0-204-lowlatency, linux-image-generic-lts-xenial,
linux-raspi2, linux-image-powerpc-smp
- --------------------------------------------------------------------------------
USN-4879-1: Linux kernel vulnerabilities
16 March 2021
Several security issues were fixed in the Linux kernel.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
Packages
o linux - Linux kernel
o linux-aws - Linux kernel for Amazon Web Services (AWS) systems
o linux-azure - Linux kernel for Microsoft Azure Cloud systems
o linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
o linux-hwe-5.8 - Linux hardware enablement (HWE) kernel
o linux-kvm - Linux kernel for cloud environments
o linux-oracle - Linux kernel for Oracle Cloud systems
o linux-raspi - Linux kernel for Raspberry Pi (V8) systems
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
o linux-image-5.8.0-1024-azure - 5.8.0-1024.26
o linux-image-5.8.0-1020-kvm - 5.8.0-1020.22
o linux-image-5.8.0-45-generic-lpae - 5.8.0-45.51
o linux-image-5.8.0-1017-raspi - 5.8.0-1017.20
o linux-image-oracle - 5.8.0.1022.21
o linux-image-azure - 5.8.0.1024.24
o linux-image-raspi-nolpae - 5.8.0.1017.20
o linux-image-oem-20.04 - 5.8.0.45.50
o linux-image-5.8.0-1017-raspi-nolpae - 5.8.0-1017.20
o linux-image-5.8.0-1022-oracle - 5.8.0-1022.23
o linux-image-virtual - 5.8.0.45.50
o linux-image-5.8.0-1025-aws - 5.8.0-1025.27
o linux-image-gcp - 5.8.0.1024.24
o linux-image-5.8.0-45-lowlatency - 5.8.0-45.51
o linux-image-raspi - 5.8.0.1017.20
o linux-image-gke - 5.8.0.1024.24
o linux-image-generic-64k - 5.8.0.45.50
o linux-image-generic - 5.8.0.45.50
o linux-image-aws - 5.8.0.1025.27
o linux-image-kvm - 5.8.0.1020.22
o linux-image-generic-lpae - 5.8.0.45.50
o linux-image-5.8.0-45-generic - 5.8.0-45.51
o linux-image-5.8.0-45-generic-64k - 5.8.0-45.51
o linux-image-5.8.0-1024-gcp - 5.8.0-1024.25
o linux-image-lowlatency - 5.8.0.45.50
Ubuntu 20.04
o linux-image-virtual-hwe-20.04 - 5.8.0.45.51~20.04.31
o linux-image-5.8.0-45-generic-lpae - 5.8.0-45.51~20.04.1
o linux-image-generic-lpae-hwe-20.04 - 5.8.0.45.51~20.04.31
o linux-image-5.8.0-45-generic - 5.8.0-45.51~20.04.1+1
o linux-image-generic-64k-hwe-20.04 - 5.8.0.45.51~20.04.31
o linux-image-5.8.0-45-generic-64k - 5.8.0-45.51~20.04.1+1
o linux-image-lowlatency-hwe-20.04 - 5.8.0.45.51~20.04.31
o linux-image-generic-hwe-20.04 - 5.8.0.45.51~20.04.31
o linux-image-5.8.0-45-lowlatency - 5.8.0-45.51~20.04.1+1
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-2020-36158
o CVE-2021-20194
Related notices
o USN-4877-1 : linux-aws, linux-aws-hwe, linux-image-oracle-lts-18.04,
linux-image-aws-lts-18.04, linux-image-raspi2, linux-snapdragon,
linux-image-generic, linux-raspi2, linux, linux-image-gcp,
linux-image-4.15.0-137-generic-lpae, linux-image-gcp-lts-18.04,
linux-image-virtual-hwe-16.04, linux-gcp-4.15,
linux-image-generic-lpae-hwe-16.04, linux-image-4.15.0-1086-kvm,
linux-image-virtual, linux-image-4.15.0-137-lowlatency,
linux-image-powerpc64-emb, linux-image-gke,
linux-image-lowlatency-hwe-16.04, linux-image-4.15.0-1013-dell300x,
linux-image-generic-hwe-16.04, linux-image-dell300x,
linux-image-4.15.0-1095-aws, linux-image-snapdragon, linux-image-oracle,
linux-dell300x, linux-image-powerpc-e500mc, linux-image-azure-lts-18.04,
linux-image-powerpc64-smp, linux-image-4.15.0-1080-raspi2,
linux-image-lowlatency, linux-image-generic-lpae,
linux-image-4.15.0-137-generic, linux-image-4.15.0-1066-oracle,
linux-oracle, linux-hwe, linux-image-4.15.0-1109-azure,
linux-image-aws-hwe, linux-image-azure, linux-azure, linux-image-oem,
linux-image-powerpc-smp, linux-azure-4.15, linux-image-kvm, linux-gcp,
linux-kvm, linux-image-4.15.0-1094-gcp, linux-image-4.15.0-1097-snapdragon
o USN-4878-1 : linux-aws, linux-image-5.4.0-1011-gkeop, linux-image-raspi2,
linux-image-generic, linux, linux-gkeop-5.4, linux-image-gcp,
linux-image-aws-edge, linux-image-5.4.0-1037-gke, linux-image-virtual,
linux-image-virtual-hwe-18.04, linux-raspi, linux-image-oem-osp1,
linux-aws-5.4, linux-image-snapdragon-hwe-18.04, linux-image-aws,
linux-image-5.4.0-67-generic, linux-image-gke-5.4, linux-image-gkeop,
linux-image-5.4.0-1041-azure, linux-image-5.4.0-1038-gcp,
linux-image-raspi, linux-image-5.4.0-1034-kvm,
linux-image-generic-lpae-hwe-18.04, linux-image-raspi-hwe-18.04,
linux-raspi-5.4, linux-image-oracle, linux-image-5.4.0-1039-aws,
linux-image-azure-edge, linux-image-5.4.0-1039-oracle,
linux-image-lowlatency, linux-image-generic-lpae, linux-gkeop,
linux-image-5.4.0-67-lowlatency, linux-oracle, linux-gcp-5.4,
linux-image-generic-hwe-18.04, linux-image-lowlatency-hwe-18.04,
linux-gke-5.4, linux-image-oem, linux-image-azure, linux-azure-5.4,
linux-hwe-5.4, linux-image-kvm, linux-gcp,
linux-image-5.4.0-67-generic-lpae, linux-image-gkeop-5.4, linux-kvm,
linux-image-5.4.0-1030-raspi, linux-oracle-5.4, linux-azure,
linux-image-gcp-edge
o USN-4876-1 : linux-aws, linux-image-4.4.0-1087-aws,
linux-image-4.4.0-204-lowlatency, linux-image-4.4.0-204-powerpc-e500mc,
linux-image-powerpc-smp-lts-xenial, linux-image-raspi2, linux-snapdragon,
linux-image-generic, linux-image-powerpc64-emb-lts-xenial, linux,
linux-image-4.4.0-204-generic-lpae, linux-raspi2,
linux-image-4.4.0-1151-snapdragon, linux-image-4.4.0-1147-raspi2,
linux-image-virtual, linux-image-powerpc64-emb, linux-image-aws,
linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-204-powerpc-smp,
linux-image-4.4.0-1089-kvm, linux-image-snapdragon,
linux-image-4.4.0-204-powerpc64-emb, linux-lts-xenial,
linux-image-powerpc64-smp, linux-image-powerpc-e500mc,
linux-image-4.4.0-1123-aws, linux-image-virtual-lts-xenial,
linux-image-generic-lpae-lts-xenial, linux-image-lowlatency,
linux-image-generic-lpae, linux-image-powerpc64-smp-lts-xenial,
linux-image-4.4.0-204-powerpc64-smp, linux-image-powerpc-smp,
linux-image-kvm, linux-kvm, linux-image-generic-lts-xenial,
linux-image-lowlatency-lts-xenial, linux-image-4.4.0-204-generic
- --------------------------END INCLUDED TEXT--------------------
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===========================================================================
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The University of Queensland
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Internet Email: auscert@auscert.org.au
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===========================================================================
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