CVE-2021-4197

Aliases:UBUNTU-CVE-2021-4197DEBIAN-CVE-2021-4197
Advisory lineage Upstream: 0 Downstream: 35
Modified
Published: 23 Mar 2022, 19:46
Last modified:03 Aug 2024, 17:16

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.54% LOW
1% probability +0.52%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

23 Mar 2022, 19:46
Published
Vulnerability first disclosed
03 Aug 2024, 17:16
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v4.0•HIGH•Score: 7.3CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • v2.0•HIGH•Score: 7.2AV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 0.54%• Percentile: 44%

Techniques & Countermeasures

  • CWE-287•Improper Authentication

    When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Affected Systems

  • broadcom•brocade_fabric_operating_system

    na

  • debian•linux

    < 5.10.113-1 | < 5.15.15-1 | < 5.15.15-1 | < 5.15.15-1

  • ubuntu•linux

    < 4.4.0-229.263 | < 4.15.0-189.200 | < 5.4.0-117.132

  • ubuntu•linux-aws

    < 4.4.0-1109.115 | < 4.4.0-1145.160 | < 4.15.0-1137.148 | < 5.4.0-1078.84

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.13

    < 5.13.0-1019.21~20.04.1

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1078.84~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-fips

    < 4.15.0-2076.81 | all | < 5.4.0-1078.84+fips1

  • ubuntu•linux-aws-hwe

    < 4.15.0-1137.148~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1146.161~14.04.1 | < 4.15.0-1146.161~16.04.1 | all | < 5.4.0-1083.87

  • ubuntu•linux-azure-4.15

    < 4.15.0-1146.161

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.13

    < 5.13.0-1021.24~20.04.1

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1083.87~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2057.63 | all | < 5.4.0-1083.87+fips1

  • ubuntu•linux-bluefield

    all | < 5.4.0-1040.44

  • ubuntu•linux-dell300x

    < 4.15.0-1049.54

  • ubuntu•linux-fips

    < 4.4.0-1079.86 | all | < 4.15.0-1094.105 | < 5.4.0-1054.61

  • ubuntu•linux-gcp

    < 4.15.0-1131.147~16.04.1 | all | < 5.4.0-1078.84

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1131.147

  • ubuntu•linux-gcp-5.11

    all

  • ubuntu•linux-gcp-5.13

    < 5.13.0-1021.25~20.04.1

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1078.84~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-fips

    < 4.15.0-2041.46 | all | < 5.4.0-1078.84+fips1

  • ubuntu•linux-gke

    < 5.4.0-1074.79

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.4

    < 5.4.0-1074.79~18.04.1

  • ubuntu•linux-gkeop

    < 5.4.0-1046.48

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1046.48~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-189.200~16.04.1 | all

  • ubuntu•linux-hwe-5.11

    all

  • ubuntu•linux-hwe-5.13

    < 5.13.0-37.42~20.04.1

  • ubuntu•linux-hwe-5.4

    < 5.4.0-117.132~18.04.1

  • ubuntu•linux-hwe-5.8

    all

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-ibm

    < 5.4.0-1026.29

  • ubuntu•linux-ibm-5.4

    < 5.4.0-1028.32~18.04.1

  • ubuntu•linux-intel-5.13

    all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-iot

    < 5.4.0-1004.6

  • ubuntu•linux-kvm

    < 4.4.0-1110.120 | < 4.15.0-1123.128 | < 5.4.0-1068.72

  • ubuntu•linux-lts-xenial

    < 4.4.0-229.263~14.04.1

Showing first 50 affected entries in server-rendered view.

References (19)