CVE-2018-12423 Information

Description

In Synapse before 0.31.2 unauthorised users can hijack rooms when there is no m.room.power_levels event in force.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

https://bugs.debian.org/901549 https://github.com/matrix-org/matrix-doc/issues/1304 https://matrix.org/blog/2018/06/14/security-update-synapse-0-31-2/

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