CVE-2021-30159

Name
CVE-2021-30159
Description
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.
NVD Severity
medium
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
Exploit https://phabricator.wikimedia.org/T272386
Third Party Advisory https://www.debian.org/security/2021/dsa-4889
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/26UJGHF7LJDOCQN6A3Z4PM7PYRKENJHE/
Third Party Advisory https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2OMSV7B2TCFBOCICN3B4SMQP5HVRJQIT/
Third Party Advisory https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html
MLIST https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html
GENTOO https://security.gentoo.org/glsa/202107-40

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* mediawiki >= None < 1.31.12
cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* mediawiki >= 1.32.0 < 1.35.2

Vulnerable and fixed packages

Source package Branch Version Maintainer Status