CVE-2018-10657: Improper Input Validation

May 2, 2018 (updated June 7, 2018)

Matrix Synapse 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.

References

matrix.org/blog/2018/05/01/security-update-synapse-0-28-1/
nvd.nist.gov/vuln/detail/CVE-2018-10657

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