CVE-2021-21392
Summary
| CVE | CVE-2021-21392 |
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| State | PUBLIC |
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| Assigner | [email protected] |
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| Source Priority | CVE Program / NVD first with legacy fallback |
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| Published | 2021-04-12 22:15:00 UTC |
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| Updated | 2023-11-07 03:30:00 UTC |
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| 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 1.28.0 requests to user provided domains were not restricted to external IP addresses when transitional IPv6 addresses were used. Outbound requests to federation, identity servers, when calculating the key validity for third-party invite events, sending push notifications, and generating URL previews are affected. This could cause Synapse to make requests to internal infrastructure on dual-stack networks. See referenced GitHub security advisory for details and workarounds. |
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NVD Known Affected Configurations (CPE 2.3)
References
| Reference | Source | Link | Tags |
|---|
| Open redirect via transitional IPv6 addresses on dual-stack networks · Advisory · matrix-org/synapse · GitHub |
CONFIRM |
github.com |
|
| [SECURITY] Fedora 34 Update: matrix-synapse-1.38.1-1.fc34 - package-announce - Fedora Mailing-Lists |
|
lists.fedoraproject.org |
|
| matrix-synapse · PyPI |
MISC |
pypi.org |
|
| Convert blacklisted IPv4 addresses to compatible IPv6 addresses. by clokep · Pull Request #9240 · matrix-org/synapse · GitHub |
MISC |
github.com |
|
| [SECURITY] Fedora 34 Update: matrix-synapse-1.38.1-1.fc34 - package-announce - Fedora Mailing-Lists |
FEDORA |
lists.fedoraproject.org |
|
| 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.
Legacy QID Mappings
- 281765 Fedora Security Update for matrix (FEDORA-2021-a627cfd31e)
- 981367 Python (pip) Security Update for matrix-synapse (GHSA-5wrh-4jwv-5w78)
