CVE & CISA-KEV Catalog

CVE-2021-4037

HIGH
7.8
CVSS v3
NVD

Description

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.

CWE-284Improper Access Control

How to fix

Remediation Available
linuxDebian
Fixed in:5.10.149-1CVE-2021-4037
Fixed in:5.14.6-1CVE-2021-4037
Fixed in:5.14.6-1CVE-2021-4037
Fixed in:5.14.6-1CVE-2021-4037
linuxUbuntu
Fixed in:4.4.0-234.268USN-5650-1
linux-awsUbuntu
Fixed in:4.4.0-1113.119USN-5650-1
Fixed in:4.4.0-1151.166USN-5650-1
linux-image-4.4.0-1113-awsUbuntu
Fixed in:4.4.0-1113.119USN-5650-1
linux-image-4.4.0-1114-kvmUbuntu
Fixed in:4.4.0-1114.124USN-5650-1
linux-image-4.4.0-1151-awsUbuntu
Fixed in:4.4.0-1151.166USN-5650-1
linux-image-4.4.0-234-genericUbuntu
Fixed in:4.4.0-234.268~14.04.1USN-5650-1
Fixed in:4.4.0-234.268USN-5650-1
linux-image-4.4.0-234-lowlatencyUbuntu
Fixed in:4.4.0-234.268~14.04.1USN-5650-1
Fixed in:4.4.0-234.268USN-5650-1
linux-image-awsUbuntu
Fixed in:4.4.0.1113.110USN-5650-1
Fixed in:4.4.0.1151.155USN-5650-1
linux-image-genericUbuntu
Fixed in:4.4.0.234.240USN-5650-1
linux-image-generic-lts-xenialUbuntu
Fixed in:4.4.0.234.203USN-5650-1
linux-image-kvmUbuntu
Fixed in:4.4.0.1114.111USN-5650-1
linux-image-lowlatencyUbuntu
Fixed in:4.4.0.234.240USN-5650-1
linux-image-lowlatency-lts-xenialUbuntu
Fixed in:4.4.0.234.203USN-5650-1
linux-image-virtualUbuntu
Fixed in:4.4.0.234.240USN-5650-1
linux-image-virtual-lts-xenialUbuntu
Fixed in:4.4.0.234.203USN-5650-1
linux-kvmUbuntu
Fixed in:4.4.0-1114.124USN-5650-1
linux-lts-xenialUbuntu
Fixed in:4.4.0-234.268~14.04.1USN-5650-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

0.28%probability of exploitation in 30 days
20thpercentile

Low risk: more likely to be exploited than 20% of all known CVEs.

References

Related Vulnerabilities

Other CWE-284 (Improper Access Control) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-27350Critical9.8100%KEV + RansomFix
CVE-2019-1653High7.5100%KEV-
CVE-2023-23752Medium5.3100%KEVFix
CVE-2023-29298High7.5100%KEV-
CVE-2023-38205High7.5100%KEV-
CVE-2024-27348Critical9.899%KEVFix
Embed a live status badge for CVE-2021-4037
CVE-2021-4037 severity badge

Markdown

[![CVE-2021-4037](https://tridentstack.com/cve/badge/CVE-2021-4037.svg)](https://tridentstack.com/cve/CVE-2021-4037)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-4037"><img src="https://tridentstack.com/cve/badge/CVE-2021-4037.svg" alt="CVE-2021-4037"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.