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CVE-2022-31214

Estado: ModificadaAlta (7.8)—

A Privilege Context Switching issue was discovered in join.c in Firejail 0.9.68. By crafting a bogus Firejail container that is accepted by the Firejail setuid-root program as a join target, a local attacker can enter an environment in which the Linux user namespace is still the initial user namespace, the NO_NEW_PRIVS prctl is not activated, and the entered mount namespace is under the attacker's control. In this way, the filesystem layout can be adjusted to gain root privileges through execution of available setuid-root binaries such as su or sudo.

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 (3)

Debian — Debian LinuxFedoraproject — FedoraFirejail Project — Firejail

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2022-31214",
  "cveTags": [],
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          "baseScore": 7.2,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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      "description": [
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          "value": "CWE-269"
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      ]
    }
  ],
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    {
      "lang": "en",
      "value": "A Privilege Context Switching issue was discovered in join.c in Firejail 0.9.68. By crafting a bogus Firejail container that is accepted by the Firejail setuid-root program as a join target, a local attacker can enter an environment in which the Linux user namespace is still the initial user namespace, the NO_NEW_PRIVS prctl is not activated, and the entered mount namespace is under the attacker's control. In this way, the filesystem layout can be adjusted to gain root privileges through execution of available setuid-root binaries such as su or sudo."
    },
    {
      "lang": "es",
      "value": "Se ha detectado un problema de cambio de contexto de privilegios en el archivo join.c en Firejail versión 0.9.68. Al diseñar un contenedor Firejail falso que es aceptado por el programa Firejail setuid-root como objetivo de join, un atacante local puede entrar en un entorno en el que el espacio de nombres de usuario de Linux sigue siendo el espacio de nombres de usuario inicial, el prctl NO_NEW_PRIVS no está activado, y el espacio de nombres de montaje introducido está bajo el control del atacante. De esta manera, la disposición del sistema de archivos puede ser ajustada para alcanzar privilegios de root mediante la ejecución de binarios setuid-root disponibles como su o sudo"
    }
  ],
  "lastModified": "2026-06-17T04:45:08.170",
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}