=========================================================================Ubuntu Security Notice USN-5209-1
January 06, 2022

linux, linux-aws, linux-aws-hwe, linux-azure-4.15, linux-dell300x,
linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle,
linux-raspi2, linux-snapdragon vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems
- linux-dell300x: Linux kernel for Dell 300x platforms
- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi2: Linux kernel for Raspberry Pi systems
- linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

Nadav Amit discovered that the hugetlb implementation in the Linux kernel
did not perform TLB flushes under certain conditions. A local attacker
could use this to leak or alter data from other processes that use huge
pages. (CVE-2021-4002)

It was discovered that a race condition existed in the timer implementation
in the Linux kernel. A privileged attacker could use this cause a denial of
service. (CVE-2021-20317)

It was discovered that a race condition existed in the overlay file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash). (CVE-2021-20321)

It was discovered that the NFC subsystem in the Linux kernel contained a
use-after-free vulnerability in its NFC Controller Interface (NCI)
implementation. A local attacker could possibly use this to cause a denial
of service (system crash) or execute arbitrary code. (CVE-2021-3760)

It was discovered that an integer overflow could be triggered in the eBPF
implementation in the Linux kernel when preallocating objects for stack
maps. A privileged local attacker could use this to cause a denial of
service or possibly execute arbitrary code. (CVE-2021-41864)

It was discovered that the ISDN CAPI implementation in the Linux kernel
contained a race condition in certain situations that could trigger an
array out-of-bounds bug. A privileged local attacker could possibly use
this to cause a denial of service or execute arbitrary code.
(CVE-2021-43389)

Update instructions:

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1033-dell300x  4.15.0-1033.38
  linux-image-4.15.0-1085-oracle  4.15.0-1085.93
  linux-image-4.15.0-1101-raspi2  4.15.0-1101.108
  linux-image-4.15.0-1105-kvm     4.15.0-1105.107
  linux-image-4.15.0-1114-gcp     4.15.0-1114.128
  linux-image-4.15.0-1118-aws     4.15.0-1118.125
  linux-image-4.15.0-1118-snapdragon  4.15.0-1118.127
  linux-image-4.15.0-1129-azure   4.15.0-1129.142
  linux-image-4.15.0-166-generic  4.15.0-166.174
  linux-image-4.15.0-166-generic-lpae  4.15.0-166.174
  linux-image-4.15.0-166-lowlatency  4.15.0-166.174
  linux-image-aws-lts-18.04       4.15.0.1118.121
  linux-image-azure-lts-18.04     4.15.0.1129.102
  linux-image-dell300x            4.15.0.1033.35
  linux-image-gcp-lts-18.04       4.15.0.1114.133
  linux-image-generic             4.15.0.166.155
  linux-image-generic-lpae        4.15.0.166.155
  linux-image-kvm                 4.15.0.1105.101
  linux-image-lowlatency          4.15.0.166.155
  linux-image-oracle-lts-18.04    4.15.0.1085.95
  linux-image-raspi2              4.15.0.1101.99
  linux-image-snapdragon          4.15.0.1118.121
  linux-image-virtual             4.15.0.166.155

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1085-oracle  4.15.0-1085.93~16.04.1
  linux-image-4.15.0-1114-gcp     4.15.0-1114.128~16.04.1
  linux-image-4.15.0-1118-aws     4.15.0-1118.125~16.04.1
  linux-image-4.15.0-1129-azure   4.15.0-1129.142~16.04.1
  linux-image-4.15.0-166-generic  4.15.0-166.174~16.04.1
  linux-image-4.15.0-166-lowlatency  4.15.0-166.174~16.04.1
  linux-image-aws-hwe             4.15.0.1118.108
  linux-image-azure               4.15.0.1129.120
  linux-image-gcp                 4.15.0.1114.115
  linux-image-generic-hwe-16.04   4.15.0.166.158
  linux-image-gke                 4.15.0.1114.115
  linux-image-lowlatency-hwe-16.04  4.15.0.166.158
  linux-image-oem                 4.15.0.166.158
  linux-image-oracle              4.15.0.1085.73
  linux-image-virtual-hwe-16.04   4.15.0.166.158

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1129-azure   4.15.0-1129.142~14.04.1
  linux-image-azure               4.15.0.1129.102

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:
  https://ubuntu.com/security/notices/USN-5209-1
  CVE-2021-20317, CVE-2021-20321, CVE-2021-3760, CVE-2021-4002,
  CVE-2021-41864, CVE-2021-43389

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.15.0-166.174
  https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1118.125
  https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1129.142
  https://launchpad.net/ubuntu/+source/linux-dell300x/4.15.0-1033.38
  https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1114.128
  https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1105.107
  https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1085.93
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1101.108
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1118.127

Ubuntu 5209-1: Linux kernel vulnerabilities

January 5, 2022
Several security issues were fixed in the Linux kernel.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-4.15.0-1033-dell300x 4.15.0-1033.38 linux-image-4.15.0-1085-oracle 4.15.0-1085.93 linux-image-4.15.0-1101-raspi2 4.15.0-1101.108 linux-image-4.15.0-1105-kvm 4.15.0-1105.107 linux-image-4.15.0-1114-gcp 4.15.0-1114.128 linux-image-4.15.0-1118-aws 4.15.0-1118.125 linux-image-4.15.0-1118-snapdragon 4.15.0-1118.127 linux-image-4.15.0-1129-azure 4.15.0-1129.142 linux-image-4.15.0-166-generic 4.15.0-166.174 linux-image-4.15.0-166-generic-lpae 4.15.0-166.174 linux-image-4.15.0-166-lowlatency 4.15.0-166.174 linux-image-aws-lts-18.04 4.15.0.1118.121 linux-image-azure-lts-18.04 4.15.0.1129.102 linux-image-dell300x 4.15.0.1033.35 linux-image-gcp-lts-18.04 4.15.0.1114.133 linux-image-generic 4.15.0.166.155 linux-image-generic-lpae 4.15.0.166.155 linux-image-kvm 4.15.0.1105.101 linux-image-lowlatency 4.15.0.166.155 linux-image-oracle-lts-18.04 4.15.0.1085.95 linux-image-raspi2 4.15.0.1101.99 linux-image-snapdragon 4.15.0.1118.121 linux-image-virtual 4.15.0.166.155 Ubuntu 16.04 ESM: linux-image-4.15.0-1085-oracle 4.15.0-1085.93~16.04.1 linux-image-4.15.0-1114-gcp 4.15.0-1114.128~16.04.1 linux-image-4.15.0-1118-aws 4.15.0-1118.125~16.04.1 linux-image-4.15.0-1129-azure 4.15.0-1129.142~16.04.1 linux-image-4.15.0-166-generic 4.15.0-166.174~16.04.1 linux-image-4.15.0-166-lowlatency 4.15.0-166.174~16.04.1 linux-image-aws-hwe 4.15.0.1118.108 linux-image-azure 4.15.0.1129.120 linux-image-gcp 4.15.0.1114.115 linux-image-generic-hwe-16.04 4.15.0.166.158 linux-image-gke 4.15.0.1114.115 linux-image-lowlatency-hwe-16.04 4.15.0.166.158 linux-image-oem 4.15.0.166.158 linux-image-oracle 4.15.0.1085.73 linux-image-virtual-hwe-16.04 4.15.0.166.158 Ubuntu 14.04 ESM: linux-image-4.15.0-1129-azure 4.15.0-1129.142~14.04.1 linux-image-azure 4.15.0.1129.102 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

https://ubuntu.com/security/notices/USN-5209-1

CVE-2021-20317, CVE-2021-20321, CVE-2021-3760, CVE-2021-4002,

CVE-2021-41864, CVE-2021-43389

Severity
January 06, 2022

Package Information

https://launchpad.net/ubuntu/+source/linux/4.15.0-166.174 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1118.125 https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1129.142 https://launchpad.net/ubuntu/+source/linux-dell300x/4.15.0-1033.38 https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1114.128 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1105.107 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1085.93 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1101.108 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1118.127

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