CVE-2023-32323 — Improper Input Validation in Synapse
Severity
4.3MEDIUMNVD
CNA5.0
EPSS
0.1%
top 66.74%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMay 26
Description
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. A malicious user on a Synapse homeserver X with permission to create certain state events can disable outbound federation from X to an arbitrary homeserver Y. Synapse instances with federation disabled are not affected. In versions of Synapse up to and including 1.73, Synapse did not limit the size of `invite_room_state`, meaning that it was possible to create an arbitrarily large invite event. Synap…
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:LExploitability: 2.8 | Impact: 1.4
Affected Packages2 packages
Patches
🔴Vulnerability Details
4OSV▶
CVE-2023-32323: Synapse is an open-source Matrix homeserver written and maintained by the Matrix↗2023-05-26
CVEList▶
Synapse Outgoing federation to specific hosts can be disabled by sending malicious invites↗2023-05-26
OSV▶
Synapse Outgoing federation to specific hosts can be disabled by sending malicious invites↗2023-05-24
GHSA▶
Synapse Outgoing federation to specific hosts can be disabled by sending malicious invites↗2023-05-24
📋Vendor Advisories
1Debian▶
CVE-2023-32323: matrix-synapse - Synapse is an open-source Matrix homeserver written and maintained by the Matrix...↗2023