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Server-side Request Forgery (SSRF) Affecting matrix-sydent package, versions [,2.3.0)

0.0
high

Snyk CVSS

    Attack Complexity Low
    Scope Changed
    Confidentiality High

    Threat Intelligence

    EPSS 0.1% (42nd percentile)
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NVD
6.5 medium

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  • Snyk ID SNYK-PYTHON-MATRIXSYDENT-1247366
  • published 16 Apr 2021
  • disclosed 16 Apr 2021
  • credit Unknown
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Introduced: 16 Apr 2021

CVE-2021-29431 Open this link in a new tab
CWE-918 Open this link in a new tab

How to fix?

Upgrade matrix-sydent to version 2.3.0 or higher.

Overview

matrix-sydent is a Reference Matrix Identity Verification and Lookup Server

Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF). 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. An additional potential workaround would be to use a firewall to ensure that Sydent cannot reach internal HTTP resources.