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

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cve-icon MITRE Information

Status: PUBLISHED

Assigner: GitHub_M

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

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

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


Link: CVE-2021-29431

JSON object: View

cve-icon NVD Information

Status : Analyzed

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

Modified: 2021-04-22T15:27:01.050


Link: CVE-2021-29431

JSON object: View

cve-icon Redhat Information

No data.