CVE-2021-21273
Summary
| CVE | CVE-2021-21273 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2021-02-26 18:15:00 UTC |
| Updated | 2023-11-07 03:29:00 UTC |
| Description | Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.25.0, requests to user provided domains were not restricted to external IP addresses when calculating the key validity for third-party invite events and sending push notifications. This could cause Synapse to make requests to internal infrastructure. The type of request was not controlled by the user, although limited modification of request bodies was possible. For the most thorough protection server administrators should remove the deprecated `federation_ip_range_blacklist` from their settings after upgrading to Synapse v1.25.0 which will result in Synapse using the improved default IP address restrictions. See the new `ip_range_blacklist` and `ip_range_whitelist` settings if more specific control is necessary. |
Risk And Classification
Problem Types: CWE-601
NVD Known Affected Configurations (CPE 2.3)
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Release v1.25.0 · matrix-org/synapse · GitHub | MISC | github.com | Third Party Advisory |
| Apply an IP range blacklist to push and key revocation requests. (#8821) · matrix-org/synapse@30fba62 · GitHub | MISC | github.com | Patch, Third Party Advisory |
| Apply the federation_ip_range_blacklist to push and key revocation requests by clokep · Pull Request #8821 · matrix-org/synapse · GitHub | MISC | github.com | Patch, Third Party Advisory |
| [SECURITY] Fedora 34 Update: matrix-synapse-1.38.1-1.fc34 - package-announce - Fedora Mailing-Lists | lists.fedoraproject.org | ||
| [SECURITY] Fedora 34 Update: matrix-synapse-1.38.1-1.fc34 - package-announce - Fedora Mailing-Lists | FEDORA | lists.fedoraproject.org | |
| Open redirects on some federation and push requests · Advisory · matrix-org/synapse · GitHub | CONFIRM | github.com | Patch, Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.