GHSA-cppw-2mf8-qpm5

Improper Verification of Cryptographic Signature in matrix-synapse

Source: GitHub Advisory Database (reviewed) High CVE-2019-18835

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	matrix-synapse	< 1.5.0	1.5.0

Details

As written in the advisory (Markdown source, shown as plain text).

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

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2019-18835 advisory
https://github.com/matrix-org/synapse/pull/6262 web
https://github.com/matrix-org/synapse/commit/172f264ed38e8bef857552f93114b4ee113a880b web
https://github.com/matrix-org/synapse package
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 web