The chunked upload API (ApiUpload) in MediaWiki before 1.23.11, 1.24.x before 1.24.4, and 1.25.x before 1.25.3 does not restrict the uploaded data to the claimed file size, which allows remote authenticated users to cause a denial of service via a chunk that exceeds the file size.
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
Link | Tags |
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http://www.securitytracker.com/id/1034028 | vdb entry |
https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-October/000181.html | mailing list patch vendor advisory |
https://phabricator.wikimedia.org/T91203 | vendor advisory |