CVE-2023-42453

2023-09-2715:19:32

CWE-285

[email protected]

web.nvd.nist.gov

synapse

open-source

matrix homeserver

read receipts

vulnerability

patch

upgrade

CVSS3

4.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

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

AI Score

4.1

Confidence

High

EPSS

0.001

Percentile

30.3%

JSON

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Users were able to forge read receipts for any event (if they knew the room ID and event ID). Note that the users were not able to view the events, but simply mark it as read. This could be confusing as clients will show the event as read by the user, even if they are not in the room. This issue has been patched in version 1.93.0. Users are advised to upgrade. There are no known workarounds for this issue.

Affected configurations

Nvd

Node

matrixsynapseRange1.34.0–1.93.0

Node

fedoraprojectfedoraMatch37

fedoraprojectfedoraMatch38

VendorProductVersionCPE
matrixsynapse*cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*
fedoraprojectfedora37cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
fedoraprojectfedora38cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
matrix	synapse	*	cpe:2.3:a:matrix:synapse::::::::
fedoraproject	fedora	37	cpe:2.3:o:fedoraproject:fedora:37:::::::*
fedoraproject	fedora	38	cpe:2.3:o:fedoraproject:fedora:38:::::::*