Improper Verification of Cryptographic Signature in matrix-synapse

GHSA-cppw-2mf8-qpm5 · CVE-2019-18835 · PYSEC-2019-186

Published May 24, 2022 · Modified Feb 15, 2025

Description

Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs. Events sent over /send_join, /send_leave, and /invite may not be correctly signed, or may not come from the expected servers.

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2019-18835
WEB https://github.com/matrix-org/synapse/pull/6262
WEB https://github.com/matrix-org/synapse/commit/172f264ed38e8bef857552f93114b4ee113a880b
PACKAGE https://github.com/matrix-org/synapse
WEB https://github.com/matrix-org/synapse/releases/tag/v1.5.0
WEB https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2019-186.yaml

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