matrix-synapse: Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs
CVE-2019-18835 is fixed in matrix-synapse on 1 platform by matrix-synapse 0.24.0+dfsg-1ubuntu0.1~esm1 (version 0.24.0+dfsg-1ubuntu0.1~esm1), released November 7, 2019. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| matrix-synapse · Ubuntu 18.04.6 LTS (bionic) | 0.24.0+dfsg-1ubuntu0.1~esm1 | matrix-synapse 0.24.0+dfsg-1ubuntu0.1~esm1 | Nov 7, 2019 |
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