7.7

CVE-2021-29431

SSRF in Sydent due to missing validation of hostnames

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Matrix ≫ Sydent Version < 2.3.0
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.19% 0.64
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
nvd@nist.gov 4 8 2.9
AV:N/AC:L/Au:S/C:P/I:N/A:N
security-advisories@github.com 7.7 3.1 4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

CWE-918 Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

https://github.com/matrix-org/sydent/releases/tag/v2.3.0
Third Party Advisory
Release Notes
https://pypi.org/project/matrix-sydent/
Third Party Advisory
Product
https://github.com/matrix-org/sydent/commit/0f00412017f25619bc36c264b29ea96808bf310a
Patch
Third Party Advisory
https://github.com/matrix-org/sydent/commit/3d531ed50d2fd41ac387f36d44d3fb2c62dd22d3
Patch
Third Party Advisory
https://github.com/matrix-org/sydent/commit/8936925f561b0c352c2fa922d5097d7245aad00a
Patch
Third Party Advisory
https://github.com/matrix-org/sydent/commit/9e573348d81df8191bbe8c266c01999c9d57cd5f
Patch
Third Party Advisory
https://github.com/matrix-org/sydent/security/advisories/GHSA-9jhm-8m8c-c3f4
Patch
Third Party Advisory