Matrix Synapse Security Filtering Flaw

GHSA-v8wm-g9f2-xjv4 · CVE-2018-12291

Published May 13, 2022 · Modified Nov 8, 2023

Description

The on_get_missing_events function in handlers/federation.py in Matrix Synapse before 0.31.1 has a security bug in the get_missing_events federation API where event visibility rules were not applied correctly.

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2018-12291
WEB https://github.com/matrix-org/synapse/pull/3371
WEB https://github.com/matrix-org/synapse/commit/0834b49c6a9b6c597a154d4b2dfcf8fff90699ec
PACKAGE https://github.com/matrix-org/synapse
WEB https://github.com/matrix-org/synapse/releases/tag/v0.31.1

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