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CVE-2021-30159

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 202107-40
Posted Jul 19, 2021
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202107-40 - Multiple vulnerabilities have been found in MediaWiki, the worst of which could result in a Denial of Service condition. Versions less than 1.36.1 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2021-30152, CVE-2021-30154, CVE-2021-30155, CVE-2021-30157, CVE-2021-30158, CVE-2021-30159, CVE-2021-30458, CVE-2021-35197
SHA-256 | b7e335ae3065b30ae46d2b8e870221e647ceb7f64d8a2dc57b17003ccfb59cdf
Debian Security Advisory 4889-1
Posted Apr 28, 2021
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4889-1 - Multiple security issues were found in MediaWiki, a website engine for collaborative work, which could result in incomplete page/blocking protection, denial of service or cross-site scripting.

tags | advisory, denial of service, xss
systems | linux, debian
advisories | CVE-2021-20270, CVE-2021-27291, CVE-2021-30152, CVE-2021-30154, CVE-2021-30155, CVE-2021-30157, CVE-2021-30158, CVE-2021-30159
SHA-256 | 49b1118e5e434a47257059a1f6acac6dd79c19b2654b3272799d4a74621cc53a
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