CVE-2022-31152 — Improper Check or Handling of Exceptional Conditions in Synapse

CWE-703 — Improper Check or Handling of Exceptional ConditionsCWE-755 — Improper Handling of Exceptional Conditions6 documents5 sources
Severity
7.5HIGHNVD
CNA6.4
EPSS
0.7%
top 27.28%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Matrix-org SynapseMatrix Synapse
Timeline
PublishedSep 2

Description

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶NVDmatrix/synapse< 1.62.0
▶CVEListV5matrix-org/synapse< 1.62.0

Patches

Patch: github.com ↗Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

4
CVEList
Synapse vulnerable to denial of service (DoS) due to incorrect application of event authorization rules↗2022-09-02
▶
OSV
CVE-2022-31152: Synapse is an open-source Matrix homeserver written and maintained by the Matrix↗2022-09-02
▶
GHSA
Denial of service due to incorrect application of event authorization rules↗2022-08-31
▶
OSV
Denial of service due to incorrect application of event authorization rules↗2022-08-31
▶

📋Vendor Advisories

1
Debian
CVE-2022-31152: matrix-synapse - Synapse is an open-source Matrix homeserver written and maintained by the Matrix...↗2022
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CVE-2022-31152 — Matrix-org Synapse vulnerability | cvebase