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 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion. Note that the groups feature is not part of the Matrix specification and the chosen maximum lengths are arbitrary. Not all clients might abide by them. Refer to referenced GitHub security advisory for additional details including workarounds.
References
Link | Resource |
---|---|
https://github.com/matrix-org/synapse/pull/9321 | Patch Third Party Advisory |
https://github.com/matrix-org/synapse/pull/9393 | Patch Third Party Advisory |
https://github.com/matrix-org/synapse/security/advisories/GHSA-jrh7-mhhx-6h88 | 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
23 Nov 2021, 22:36
Type | Values Removed | Values Added |
---|---|---|
CPE | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | |
References |
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Information
Published : 2021-04-12 22:15
Updated : 2024-02-04 21:47
NVD link : CVE-2021-21393
Mitre link : CVE-2021-21393
CVE.ORG link : CVE-2021-21393
JSON object : View
Products Affected
matrix
- synapse
fedoraproject
- fedora
CWE
CWE-20
Improper Input Validation