Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion. Note that the groups feature is not part of the Matrix specification and the chosen maximum lengths are arbitrary. Not all clients might abide by them. Refer to referenced GitHub security advisory for additional details including workarounds.
References
Link | Resource |
---|---|
https://github.com/matrix-org/synapse/pull/9321 | Patch Third Party Advisory |
https://github.com/matrix-org/synapse/pull/9393 | Patch Third Party Advisory |
https://github.com/matrix-org/synapse/security/advisories/GHSA-w9fg-xffh-p362 | Patch Third Party Advisory |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/ | |
https://pypi.org/project/matrix-synapse/ | Product Third Party Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: GitHub_M
Published: 2021-04-12T20:45:18
Updated: 2021-08-02T02:06:20
Reserved: 2020-12-22T00:00:00
Link: CVE-2021-21394
JSON object: View
NVD Information
Status : Modified
Published: 2021-04-12T21:15:14.013
Modified: 2023-11-07T03:30:00.553
Link: CVE-2021-21394
JSON object: View
Redhat Information
No data.
CWE