CVE-2021-31553

An issue was discovered in the CheckUser extension for MediaWiki through 1.35.2. MediaWiki usernames with trailing whitespace could be stored in the cu_log database table such that denial of service occurred for certain CheckUser extension pages and functionality. For example, the attacker could turn off Special:CheckUserLog and thus interfere with usage tracking.

CVSS v3.0 6.5 MEDIUM
CVSS v2.0 6.4 MEDIUM

6.5^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

6.4^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666963	Issue Tracking Third Party Advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666964	Issue Tracking Third Party Advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667027	Issue Tracking Third Party Advisory
https://phabricator.wikimedia.org/T275669	Third Party Advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667025	Issue Tracking Third Party Advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667023	Issue Tracking Third Party Advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667024	Issue Tracking Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*

Information

Published : 2021-04-21 20:15

Updated : 2021-04-22 13:14

NVD link : CVE-2021-31553

Mitre link : CVE-2021-31553

JSON object : View

CWE

CWE-428

Unquoted Search Path or Element

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Products Affected

mediawiki

mediawiki

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