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CVE-2023-40184

Estado: ModificadaMedia (6.5)—

xrdp is an open source remote desktop protocol (RDP) server. In versions prior to 0.9.23 improper handling of session establishment errors allows bypassing OS-level session restrictions. The `auth_start_session` function can return non-zero (1) value on, e.g., PAM error which may result in in session restrictions such as max concurrent sessions per user by PAM (ex ./etc/security/limits.conf) to be bypassed. Users (administrators) don't use restrictions by PAM are not affected. This issue has been addressed in release version 0.9.23. Users are advised to upgrade. There are no known workarounds for this issue.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Neutrinolabs — Xrdp

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2023-40184",
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          "version": "2.0.3",
          "timestamp": "2024-09-30T15:44:59.219269Z"
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      "description": [
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  "descriptions": [
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      "lang": "en",
      "value": "xrdp is an open source remote desktop protocol (RDP) server. In versions prior to 0.9.23 improper handling of session establishment errors allows bypassing OS-level session restrictions. The `auth_start_session` function can return non-zero (1) value on, e.g., PAM error which may result in in session restrictions such as max concurrent sessions per user by PAM (ex ./etc/security/limits.conf) to be bypassed. Users (administrators) don't use restrictions by PAM are not affected. This issue has been addressed in release version 0.9.23. Users are advised to upgrade. There are no known workarounds for this issue."
    },
    {
      "lang": "es",
      "value": "xrdp es un servidor de protocolo de escritorio remoto (RDP) de código abierto. En versiones anteriores a la 0.9.23, el manejo inadecuado de los errores de establecimiento de sesión permite eludir las restricciones de sesión a nivel del sistema operativo. La función `auth_start_session` puede devolver un valor distinto de cero (1), por ejemplo, en un error de PAM, lo que puede dar lugar a restricciones de sesión, como el número máximo de sesiones simultáneas por usuario por parte de PAM (por ejemplo, ./etc/security/limits.conf) para ser omitido. Los usuarios (administradores) que no utilizan restricciones por PAM no se ven afectados. Este problema se solucionó en la versión 0.9.23. Se recomienda a los usuarios que actualicen. No se conocen workarounds para este problema."
    }
  ],
  "lastModified": "2026-06-17T06:16:36.633",
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