CVE-2021-3847

CVSS V2 High 7.2 CVSS V3 High 7.8

Description

An unauthorized access to the execution of the setuid file with capabilities flaw in the Linux kernel OverlayFS subsystem was found in the way user copying a capable file from a nosuid mount into another mount. A local user could use this flaw to escalate their privileges on the system.

Overview

CVE ID
CVE-2021-3847

Assigner
secalert@redhat.com

Vulnerability Status
Analyzed

Published Version
2022-04-01T23:15:10

Last Modified Date
2022-04-11T20:31:06

Weakness Enumerations

CWE	URL
CWE-281	http://cwe.mitre.org/data/definitions/281.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:o:linux:linux_kernel::::::::	1	OR		5.17.0
cpe:2.3:o:fedoraproject:fedora:34:::::::*	1	OR

CVSS Version 2

Version
2.0

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

Access Vector
LOCAL

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
COMPLETE

Integrity Impact
COMPLETE

Availability Impact
COMPLETE

Base Score
7.2

Severity
HIGH

Exploitability Score
3.9

Impact Score
10

CVSS Version 3

Version
3.1

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

Attack Vector
LOCAL

Attack Compatibility
LOW

Privileges Required
LOW

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
7.8

Base Severity
HIGH

Exploitability Score
1.8

Impact Score
5.9

References

Reference URL	Reference Tags
https://www.openwall.com/lists/oss-security/2021/10/14/3
https://bugzilla.redhat.com/show_bug.cgi?id=2009704

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-3847
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3847

History

Created	Old Value	New Value	Data Type	Notes
2022-04-04 00:38:51				Added to TrackCVE
2022-12-06 13:59:27	2022-04-01T23:15Z	2022-04-01T23:15:10	CVE Published Date	updated
2022-12-06 13:59:27		2022-04-11T20:31:06	CVE Modified Date	updated
2022-12-06 13:59:27		Analyzed	Vulnerability Status	updated