Bug 1948638 (CVE-2021-30159)

Summary:	CVE-2021-30159 mediawiki: users can bypass intended restrictions on deleting pages in certain "fast double move" situations
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aos-bugs, axel.thimm, bmontgom, eparis, jburrell, jokerman, mike, nstielau, puiterwijk, shurley, sponnaga
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	mediawiki 1.31.12, mediawiki 1.35.2	Doc Type:	If docs needed, set a value
Doc Text:	In the mediawiki package, users can bypass intended restrictions on deleting pages in certain "fast double move" situations.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-28 08:50:50 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1947340, 1948639
Bug Blocks:	1948646

Description Guilherme de Almeida Suckevicz 2021-04-12 16:34:48 UTC

An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. Users can bypass intended restrictions on deleting pages in certain "fast double move" situations. MovePage::isValidMoveTarget() uses FOR UPDATE, but it's only called if Title::getArticleID() returns non-zero with no special flags. Next, MovePage::moveToInternal() will delete the page if getArticleID(READ_LATEST) is non-zero. Therefore, if the page is missing in the replica DB, isValidMove() will return true, and then moveToInternal() will unconditionally delete the page if it can be found in the master.

Reference:
https://phabricator.wikimedia.org/T272386

Comment 1 Guilherme de Almeida Suckevicz 2021-04-12 16:35:15 UTC

Created mediawiki tracking bugs for this issue:

Affects: fedora-all [bug 1948639]

Comment 2 Przemyslaw Roguski 2021-04-13 10:35:18 UTC

Statement:

The mediawiki package was removed from OpenShift Container Platform (OCP) in version 4.3, therefore for OCP 4 has been marked as out of support scope.