Executive Summary

Informations
Name CVE-2021-31553 First vendor Publication 2021-04-22
Vendor Cve Last vendor Modification 2021-04-22

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Overall CVSS Score 6.5
Base Score 6.5 Environmental Score 6.5
impact SubScore 2.5 Temporal Score 6.5
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact Low Availability Impact Low
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:P/A:P)
Cvss Base Score 6.4 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31553

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-428 Unquoted Search Path or Element

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 321

Sources (Detail)

Source Url
MISC https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666963
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666964
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667023
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667024
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667025
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667027
https://phabricator.wikimedia.org/T275669

Alert History

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Date Informations
2021-05-04 14:10:05
  • Multiple Updates
2021-04-23 01:10:32
  • Multiple Updates
2021-04-22 17:22:45
  • Multiple Updates
2021-04-22 09:22:47
  • First insertion