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Ubuntu: (Multiple Advisories) (CVE-2021-4197): Linux kernel (OEM) vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2021-4197): Linux kernel (OEM) vulnerabilities

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
01/25/2022
Created
03/24/2022
Added
02/09/2022
Modified
03/22/2023

Description

An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.

Solution(s)

  • ubuntu-upgrade-linux-image-4-15-0-1049-dell300x
  • ubuntu-upgrade-linux-image-4-15-0-1102-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1115-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1123-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1131-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1133-snapdragon
  • ubuntu-upgrade-linux-image-4-15-0-1137-aws
  • ubuntu-upgrade-linux-image-4-15-0-1137-aws-hwe
  • ubuntu-upgrade-linux-image-4-15-0-1146-azure
  • ubuntu-upgrade-linux-image-4-15-0-189-generic
  • ubuntu-upgrade-linux-image-4-15-0-189-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-189-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-1109-aws
  • ubuntu-upgrade-linux-image-4-4-0-1110-kvm
  • ubuntu-upgrade-linux-image-4-4-0-1145-aws
  • ubuntu-upgrade-linux-image-4-4-0-229-generic
  • ubuntu-upgrade-linux-image-4-4-0-229-lowlatency
  • ubuntu-upgrade-linux-image-5-13-0-1018-kvm
  • ubuntu-upgrade-linux-image-5-13-0-1019-aws
  • ubuntu-upgrade-linux-image-5-13-0-1021-azure
  • ubuntu-upgrade-linux-image-5-13-0-1021-gcp
  • ubuntu-upgrade-linux-image-5-13-0-1022-raspi
  • ubuntu-upgrade-linux-image-5-13-0-1022-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-13-0-1023-oracle
  • ubuntu-upgrade-linux-image-5-13-0-1025-oracle
  • ubuntu-upgrade-linux-image-5-13-0-37-generic
  • ubuntu-upgrade-linux-image-5-13-0-37-generic-64k
  • ubuntu-upgrade-linux-image-5-13-0-37-generic-lpae
  • ubuntu-upgrade-linux-image-5-13-0-37-lowlatency
  • ubuntu-upgrade-linux-image-5-14-0-1022-oem
  • ubuntu-upgrade-linux-image-5-4-0-1026-ibm
  • ubuntu-upgrade-linux-image-5-4-0-1046-gkeop
  • ubuntu-upgrade-linux-image-5-4-0-1065-raspi
  • ubuntu-upgrade-linux-image-5-4-0-1068-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1074-gke
  • ubuntu-upgrade-linux-image-5-4-0-1076-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1078-aws
  • ubuntu-upgrade-linux-image-5-4-0-1078-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1083-azure
  • ubuntu-upgrade-linux-image-5-4-0-1083-azure-fde
  • ubuntu-upgrade-linux-image-5-4-0-117-generic
  • ubuntu-upgrade-linux-image-5-4-0-117-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-117-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-hwe
  • ubuntu-upgrade-linux-image-aws-lts-18-04
  • ubuntu-upgrade-linux-image-aws-lts-20-04
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-fde
  • ubuntu-upgrade-linux-image-azure-lts-18-04
  • ubuntu-upgrade-linux-image-azure-lts-20-04
  • ubuntu-upgrade-linux-image-dell300x
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-lts-18-04
  • ubuntu-upgrade-linux-image-gcp-lts-20-04
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-64k
  • ubuntu-upgrade-linux-image-generic-64k-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-lts-xenial
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gke-5-4
  • ubuntu-upgrade-linux-image-gkeop
  • ubuntu-upgrade-linux-image-gkeop-5-4
  • ubuntu-upgrade-linux-image-ibm
  • ubuntu-upgrade-linux-image-ibm-lts-20-04
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-16-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-18-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-20-04
  • ubuntu-upgrade-linux-image-lowlatency-lts-xenial
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-oem-20-04
  • ubuntu-upgrade-linux-image-oem-20-04d
  • ubuntu-upgrade-linux-image-oem-osp1
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-lts-18-04
  • ubuntu-upgrade-linux-image-oracle-lts-20-04
  • ubuntu-upgrade-linux-image-raspi
  • ubuntu-upgrade-linux-image-raspi-hwe-18-04
  • ubuntu-upgrade-linux-image-raspi-nolpae
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon
  • ubuntu-upgrade-linux-image-snapdragon-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-16-04
  • ubuntu-upgrade-linux-image-virtual-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual-hwe-20-04
  • ubuntu-upgrade-linux-image-virtual-lts-xenial

References

  • https://attackerkb.com/topics/cve-2021-4197
  • CVE - 2021-4197
  • DSA-5127
  • DSA-5173
  • CVE-2021-4197
  • USN-5165-1
  • USN-5265-1
  • USN-5278-1
  • USN-5337-1
  • USN-5368-1
  • USN-5381-1
  • USN-5413-1
  • USN-5416-1
  • USN-5417-1
  • USN-5418-1
  • USN-5465-1
  • USN-5466-1
  • USN-5467-1
  • USN-5468-1
  • USN-5469-1
  • USN-5470-1
  • USN-5471-1
  • USN-5500-1
  • USN-5505-1
  • USN-5513-1
  • USN-5515-1
  • USN-5541-1
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