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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== 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-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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