CVE-2021-42040

CVSS V2 Medium 5 CVSS V3 High 7.5

Description

An issue was discovered in MediaWiki through 1.36.2. A parser function related to loop control allowed for an infinite loop (and php-fpm hang) within the Loops extension because egLoopsCountLimit is mishandled. This could lead to memory exhaustion.

Overview

CVE ID
CVE-2021-42040

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2021-10-06T21:15:07

Last Modified Date
2021-10-14T18:52:28

Weakness Enumerations

CWE	URL
CWE-835	http://cwe.mitre.org/data/definitions/835.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:mediawiki:mediawiki::::::::	1	OR		1.36.2

CVSS Version 2

Version
2.0

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

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
NONE

Integrity Impact
NONE

Availability Impact
PARTIAL

Base Score
5

Severity
MEDIUM

Exploitability Score
10

Impact Score
2.9

CVSS Version 3

Version
3.1

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

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
NONE

Availability Impact
HIGH

Base Score
7.5

Base Severity
HIGH

Exploitability Score
3.9

Impact Score
3.6

References

Reference URL	Reference Tags
https://gerrit.wikimedia.org/r/q/I0caf6f129f94612b5bcf406a171aa5ffedea1f80	Patch Vendor Advisory
https://phabricator.wikimedia.org/T287347	Patch Vendor Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-42040
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42040

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 06:51:39				Added to TrackCVE
2022-12-05 11:58:26	2021-10-06T21:15Z	2021-10-06T21:15:07	CVE Published Date	updated
2022-12-05 11:58:26		2021-10-14T18:52:28	CVE Modified Date	updated
2022-12-05 11:58:26		Analyzed	Vulnerability Status	updated