Bug 1948638 (CVE-2021-30159) - CVE-2021-30159 mediawiki: users can bypass intended restrictions on deleting pages in certain "fast double move" situations
Summary: CVE-2021-30159 mediawiki: users can bypass intended restrictions on deleting ...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2021-30159
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: 1947340 1948639
Blocks: 1948646
TreeView+ depends on / blocked
 
Reported: 2021-04-12 16:34 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-10-28 08:50 UTC (History)
11 users (show)

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.
Clone Of:
Environment:
Last Closed: 2021-10-28 08:50:50 UTC


Attachments (Terms of Use)

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.


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