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.
References
Link | Resource |
---|---|
https://github.com/matrix-org/synapse/pull/9240 | Patch Third Party Advisory |
https://github.com/matrix-org/synapse/security/advisories/GHSA-5wrh-4jwv-5w78 | Patch Third Party Advisory |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/ | |
https://pypi.org/project/matrix-synapse/ | Product Third Party Advisory |
Configurations
History
No history.
Information
Published : 2021-04-12 22:15
Updated : 2023-11-07 03:30
NVD link : CVE-2021-21392
Mitre link : CVE-2021-21392
CVE.ORG link : CVE-2021-21392
JSON object : View
Products Affected
matrix
- synapse
fedoraproject
- fedora
CWE
CWE-601
URL Redirection to Untrusted Site ('Open Redirect')