HIGH 7.5
GHSA-vmcc-4p4x-x7wg
Matrix Synapse DoS
Details
Matrix Synapse before 0.28.1 is prone to a denial of service flaw where malicious events injected with depth = 2<sup>63</sup> - 1 render rooms unusable, related to `federation/federation_base.py` and `handlers/message.py`, as exploited in the wild in April 2018.
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Affected packages
PyPI / matrix-synapse
Introduced in:
0 Fixed in: 0.28.1 Fix
pip install --upgrade 'matrix-synapse>=0.28.1' References
- https://nvd.nist.gov/vuln/detail/CVE-2018-10657 [ADVISORY]
- https://github.com/matrix-org/synapse/commit/33f469ba19586bbafa0cf2c7d7c35463bdab87eb [WEB]
- https://docs.google.com/document/d/1I3fi2S-XnpO45qrpCsowZv8P8dHcNZ4fsBsbOW7KABI/edit#heading=h.fj95ykuss7s1 [WEB]
- https://github.com/matrix-org/synapse [PACKAGE]
- https://matrix.org/blog/2018/05/01/security-update-synapse-0-28-1 [WEB]