CVE-2021-4197

high

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.

References

https://bugzilla.redhat.com/show_bug.cgi?id=2035652

https://lore.kernel.org/lkml/[email protected]/T/

https://www.debian.org/security/2022/dsa-5127

https://security.netapp.com/advisory/ntap-20220602-0006/

https://www.debian.org/security/2022/dsa-5173

https://www.oracle.com/security-alerts/cpujul2022.html

Details

Source: MITRE

Published: 2022-03-23

Updated: 2022-07-25

Type: CWE-287

Risk Information

CVSS v2

Base Score: 7.2

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH