CVE-2018-10657: Input Validation
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/federationbase.py and handlers/message.py, as exploited in the wild in April 2018.
Other sources
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/federationbase.py and handlers/message.py, as exploited in the wild in April 2018.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2018-10657?
CVE-2018-10657 is a vulnerability in Matrix Synapse before version 0.28.1 that allows for a denial of service attack by injecting malicious events.
How does CVE-2018-10657 affect Matrix Synapse?
CVE-2018-10657 affects Matrix Synapse versions before 0.28.1 by making rooms unusable through the injection of malicious events.
What is the severity of CVE-2018-10657?
CVE-2018-10657 has a severity rating of 7.5 (high).
How can I fix CVE-2018-10657?
To fix CVE-2018-10657, upgrade Matrix Synapse to version 0.28.1 or higher.
Where can I find more information about CVE-2018-10657?
You can find more information about CVE-2018-10657 at the following references: [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-10657), [GitHub](https://github.com/matrix-org/synapse/commit/33f469ba19586bbafa0cf2c7d7c35463bdab87eb), [Matrix.org](https://matrix.org/blog/2018/05/01/security-update-synapse-0-28-1/).