Sydent is a reference Matrix identity server. Sydent does not limit the size of requests it receives from HTTP clients. A malicious user could send an HTTP request with a very large body, leading to memory exhaustion and denial of service. Sydent also does not limit response size for requests it makes to remote Matrix homeservers. A malicious homeserver could return a very large response, again leading to memory exhaustion and denial of service. This affects any server which accepts registration requests from untrusted clients. This issue has been patched by releases 89071a1, 0523511, f56eee3. As a workaround request sizes can be limited in an HTTP reverse-proxy. There are no known workarounds for the problem with overlarge responses.
References
Configurations
History
21 Nov 2024, 06:01
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/matrix-org/sydent/commit/0523511d2fb40f2738f8a8549868f44b96e5dab7 - Patch, Third Party Advisory | |
| References | () https://github.com/matrix-org/sydent/commit/89071a1a754c69a50deac89e6bb74002d4cda19d - Patch, Third Party Advisory | |
| References | () https://github.com/matrix-org/sydent/commit/f56eee315b6c44fdd9f6aa785cc2ec744a594428 - Patch, Third Party Advisory | |
| References | () https://github.com/matrix-org/sydent/releases/tag/v2.3.0 - Release Notes, Third Party Advisory | |
| References | () https://github.com/matrix-org/sydent/security/advisories/GHSA-wmg4-8cp2-hpg9 - Patch, Third Party Advisory | |
| References | () https://pypi.org/project/matrix-sydent/ - Product, Third Party Advisory |
Information
Published : 2021-04-15 21:15
Updated : 2024-11-21 06:01
NVD link : CVE-2021-29430
Mitre link : CVE-2021-29430
CVE.ORG link : CVE-2021-29430
JSON object : View
Products Affected
matrix
- sydent