Bug 2279237 (CVE-2024-34502)

Summary:	CVE-2024-34502 mediawiki: MergeLexemes makes edits on GET requests without edit tokens
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:	2279239
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Description Avinash Hanwate 2024-05-06 04:16:13 UTC

An issue was discovered in WikibaseLexeme in MediaWiki before 1.39.6, 1.40.x before 1.40.2, and 1.41.x before 1.41.1. Loading Special:MergeLexemes will (attempt to) make an edit that merges the from-id to the to-id, even if the request was not a POST request, and even if it does not contain an edit token.

https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikibaseLexeme/+/1013359
https://phabricator.wikimedia.org/T357101

Comment 1 Avinash Hanwate 2024-05-06 04:19:10 UTC

Created mediawiki tracking bugs for this issue:

Affects: fedora-all [bug 2279239]