CVE-2020-10534 Information

Description

In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0 an issue related to IP range evaluation resulted in blocked users re-gaining escalated privileges. This is related to the case in which an IP address is contained in two ranges one of which is locally disabled.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://gerrit.wikimedia.org/r//q/I9cc5fb2c08c78bbd797a5fc6d89f4577c8cc118b https://phabricator.wikimedia.org/T229731

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8