CVE-2020-35623 Information

Description

An issue was discovered in the CasAuth extension for MediaWiki through 1.35.1. Due to improper username validation it allowed user impersonation with trivial manipulations of certain characters within a given username. An ordinary user may be able to login as a ureaucrat user\ who has a similar username as demonstrated by usernames that differ only in (1) bidirectional override symbols or (2) blank space.

CVSS Vector

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

Reference

https://github.com/CWRUChielLab/CASAuth/pull/11 https://phabricator.wikimedia.org/T263498

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5