Description
Matrix Synapse before 0.28.1 is prone to a denial of service flaw where malicious events injected with depth = 2^63 - 1 render rooms unusable, related to federation/federation_base.py and handlers/message.py, as exploited in the wild in April 2018.
Metrics
CVSS 3.0 7.5/10
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- https://github.com/matrix-org/synapse/commit/33f469ba19586bbafa0cf2c7d7c35463bdab87ebPatch
- https://matrix.org/blog/2018/05/01/security-update-synapse-0-28-1/Vendor Advisory
- https://github.com/matrix-org/synapse/commit/33f469ba19586bbafa0cf2c7d7c35463bdab87ebPatch
- https://matrix.org/blog/2018/05/01/security-update-synapse-0-28-1/Vendor Advisory
Timeline
- Published
- May 2, 2018
- Last modified
- Jun 17, 2026
- NVD status
- Modified