HIGH 7.5

GHSA-v8wm-g9f2-xjv4

Matrix Synapse Security Filtering Flaw

Details

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.

Are you affected?

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Affected packages

PyPI / matrix-synapse

Introduced in: 0 Fixed in: 0.31.1

Fix pip install --upgrade 'matrix-synapse>=0.31.1'

References

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