CVE-2018-12423

2022-10-0316:22:08

Debian Security Bug Tracker

security-tracker.debian.org

synapse

vulnerability

hijack rooms

unauthorized users

m.room.power_levels event

unix

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

31.3%

JSON

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

OSVersionArchitecturePackageVersionFilename
Debian999allmatrix-synapse< 0.31.2+dfsg-1matrix-synapse_0.31.2+dfsg-1_all.deb
Debian13allmatrix-synapse< 0.31.2+dfsg-1matrix-synapse_0.31.2+dfsg-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	999	all	matrix-synapse	< 0.31.2+dfsg-1	matrix-synapse_0.31.2+dfsg-1_all.deb
Debian	13	all	matrix-synapse	< 0.31.2+dfsg-1	matrix-synapse_0.31.2+dfsg-1_all.deb