Homepage
About Snyk

CVE-2021-30159 Affecting mediawiki package, versions <1:1.31.14-1~deb10u1

0.0
medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.33% (71st percentile)
Expand this section
NVD
4.3 medium
Expand this section
Red Hat
6.5 medium

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk ID SNYK-DEBIAN10-MEDIAWIKI-1244657
  • published 10 Apr 2021
  • disclosed 9 Apr 2021
Report a new vulnerability Found a mistake?

Introduced: 9 Apr 2021

CVE-2021-30159 Open this link in a new tab

How to fix?

Upgrade Debian:10 mediawiki to version 1:1.31.14-1~deb10u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mediawiki package and not the mediawiki package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

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.

References