Bug 2009517 (CVE-2021-41800) - CVE-2021-41800 mediawiki: mishandled PoolCounter's protection may result DoS when visiting Special:Contributions.
Summary: CVE-2021-41800 mediawiki: mishandled PoolCounter's protection may result DoS ...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2021-41800
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2010199
Blocks: 2009518
TreeView+ depends on / blocked
 
Reported: 2021-09-30 20:26 UTC by Pedro Sampaio
Modified: 2021-11-02 12:05 UTC (History)
12 users (show)

Fixed In Version: mediawiki 1.31.16, mediawiki 1.35.4, mediawiki 1.36.2
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in MediaWiki, where Visiting Special:Contributions may result in a long query due to mishandled PoolCounter protection. This issue may cause resource exhaustion, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Clone Of:
Environment:
Last Closed: 2021-10-28 09:08:36 UTC
Embargoed:

Attachments (Terms of Use)

Description Pedro Sampaio 2021-09-30 20:26:23 UTC 
A flaw was found in Mediawiki before 1.31.16, 1.35.4 and 1.36.2. The call to $pager->getNumRows() itself triggers execution of the database query backing the page.

References:

https://lists.wikimedia.org/hyperkitty/list/mediawiki-announce@lists.wikimedia.org/message/2IFS5CM2YV4VMSODPX3J2LFHKSEWVFV5/
Comment 1 Przemyslaw Roguski 2021-10-04 07:45:39 UTC 
Created mediawiki tracking bugs for this issue:

Affects: fedora-all [bug 2010199]
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