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CVE-2023-42453

Improper validation of receipts allows forged read receipts in matrix synapse

Published: Sep 26, 2023Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-285
NVD MITRE
3.1CVSSLOW
EPSS Score
0.7%
Top 53.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-285NVD-CWE-Other

Affected Products

synapsematrix
On-premWeb App
Communications / messaging-chat
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
synapsematrix-org
On-premWeb App
Communications / messaging-chat
matrix-synapsePyPIOSS Libraries
matrixoss-projectGBCommunicationsaka synapse, matrix irc bridge, javascript sdk
fedoraprojectoss-projectUSOperating Systemsaka fedora project
matrix-orgoss-projectDECommunicationsaka synapse, matrix-js-sdk, matrix appservice irc
pypipackage-ecosystemOSS Libraries

Exploitability

Official Patch Available

References

https://github.com/matrix-org/synapse/pull/16327
github.com
https://github.com/matrix-org/synapse/security/advisories/GHSA-7565-cq32-vx2x
github.com
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2AFB2Y3S2VCPCN5P2XCZTG24MBMZ7DM4/
lists.fedoraproject.org
and 10 more references View all →

Timeline

Published
Sep 26, 2023
Last Updated
Nov 21, 2024

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