Description

An issue was discovered in MediaWiki through 1.38.1. The lemma length of a Wikibase lexeme is currently capped at a thousand characters. Unfortunately, this length is not validated, allowing much larger lexemes to be created, which introduces various denial-of-service attack vectors within the Wikibase and WikibaseLexeme extensions. This is related to Special:NewLexeme and Special:NewProperty.

Remediation

References

CVE-2022-34750

Related Vulnerabilities

phpMyAdmin Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2020-26934)

Atlassian Jira Authorization Bypass Through User-Controlled Key Vulnerability (CVE-2021-41306)

WordPress Plugin Duplicator-WordPress Migration Unspecified Vulnerability (1.1.34)

ownCloud Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2012-4390)

Oracle Database Server CVE-2009-1997 Vulnerability (CVE-2009-1997)

Severity

High

Classification

CVE-2022-34750 CWE-770 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Tags

Missing Update Known Vulnerabilities