Improper Access Control Affecting kernel-rt-debug-modules-extra package, versions <0:4.18.0-372.9.1.rt7.166.el8


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (20th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELRTDEBUGMODULESEXTRA-4261963
  • published1 Dec 2021
  • disclosed16 Sept 2021

Introduced: 16 Sep 2021

CVE-2021-4037  (opens in a new tab)
CWE-284  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-rt-debug-modules-extra to version 0:4.18.0-372.9.1.rt7.166.el8 or higher.
This issue was patched in RHSA-2022:1975.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-modules-extra package and not the kernel-rt-debug-modules-extra package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A vulnerability was found in the fs/inode.c:inode_init_owner() function logic of the LInux kernel that allows local users to create files for the XFS file-system with an unintended group ownership and with group execution and SGID permission bits set, in a scenario where a directory is SGID and belongs to a certain group and is writable by a user who is not a member of this group. This can lead to excessive permissions granted in case when they should not. This vulnerability is similar to the previous CVE-2018-13405 and adds the missed fix for the XFS.

CVSS Scores

version 3.1