Matrix Synapse before 0.34.0.1, when the macaroon_secret_key authentication parameter is not set, uses a predictable value to derive a secret key and other secrets which could allow remote attackers to impersonate users.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Mar 19, 2019 |
| Freebsd | — | Upgrade py27-matrix-synapseUpgrade py37-matrix-synapseUpgrade py35-matrix-synapseUpgrade py36-matrix-synapse | Jan 16, 2019 | Jan 15, 2019 |
| Ubuntu | — | Upgrade matrix-synapse (Ubuntu Pro) | May 17, 2023 | Mar 21, 2019 |
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