Sydent is a reference Matrix identity server. Sydent can be induced to send HTTP GET requests to internal systems, due to lack of parameter validation or IP address blacklisting. It is not possible to exfiltrate data or control request headers, but it might be possible to use the attack to perform an internal port enumeration. This issue has been addressed in in 9e57334, 8936925, 3d531ed, 0f00412. A potential workaround would be to use a firewall to ensure that Sydent cannot reach internal HTTP resources.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2021-04-15T21:00:16

Updated: 2024-08-03T22:02:51.856Z

Reserved: 2021-03-30T00:00:00

Link: CVE-2021-29431

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-04-15T21:15:17.520

Modified: 2024-11-21T06:01:04.993

Link: CVE-2021-29431

cve-icon Redhat

No data.