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.
Advisories
Source ID Title
EUVD EUVD EUVD-2021-0120 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.
Github GHSA Github GHSA GHSA-9jhm-8m8c-c3f4 SSRF in Sydent due to missing validation of hostnames
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

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.

cve-icon OpenCVE Enrichment

No data.