PT-2018-3640 · Wikimedia+1 · Mediawiki+1

Az1568 · Published 2018-10-01 · Updated 2024-03-06 · CVE-2020-35477

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions MediaWiki versions prior to 1.35.1

Description The issue is related to a lack of input validation mechanism in MediaWiki, which can be exploited by a remote attacker to impact data integrity. Specifically, when MediaWiki:Mainpage is set to Special:MyLanguage/Main Page, visiting a log entry on Special:Log and toggling the "Change visibility of selected log entries" checkbox (or a tags checkbox) next to it results in a redirection to the main page's action=historysubmit, instead of displaying a revision-deletion form as expected.

Recommendations For MediaWiki versions prior to 1.35.1, update to version 1.35.1 or later to resolve the issue. As a temporary workaround, consider avoiding the use of the "Change visibility of selected log entries" checkbox (or tags checkbox) on Special:Log pages until the update is applied.

Exploit

Fix

RCE

Weakness Enumeration

CWE-670

CWE-20

Related Identifiers

ALT-PU-2020-3554

ALT-PU-2020-3568

BDU:2021-01771

BIT-MEDIAWIKI-2020-35477

CVE-2020-35477

DLA-2504-1

DSA-4816-1

MGASA-2021-0086

Affected Products

Alt Linux

Mediawiki

References · 28

• 🔥 https://phabricator.wikimedia.org/T205908 · Exploit
• https://security-tracker.debian.org/tracker/CVE-2020-35477 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-35477 · Security Note
• https://debian.org/security/2020/dsa-4816 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-35477 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-35477 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4816-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-35477 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2021-0086.html · Security Note
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC · Vendor Advisory
• https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-01771 · Security Note
• https://osv.dev/vulnerability/MGASA-2021-0086 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2504-1 · Vendor Advisory