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CVE-2026-33945

Estado: AnalizadaCrítica (9.6)—

Incus is a system container and virtual machine manager. Incus instances have an option to provide credentials to systemd in the guest. For containers, this is handled through a shared directory. Prior to version 6.23.0, an attacker can set a configuration key named something like `systemd.credential.../../../../../../root/.bashrc` to cause Incus to write outside of the `credentials` directory associated with the container. This makes use of the fact that the Incus syntax for such credentials is `systemd.credential.XYZ` where `XYZ` can itself contain more periods. While it's not possible to read any data this way, it's possible to write to arbitrary files as root, enabling both privilege escalation and denial of service attacks. Version 6.23.0 fixes the 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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad de path traversal (CWE-22) en servicio remoto Incus que requiere credenciales (PR:L). Permite escritura arbitraria de archivos como root, causando manipulación de datos, DoS y escalada de privilegios.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareVulnerability ScanningRestrict File and Directory Permissions

Tecnologías afectadas (1)

Linuxcontainers — Incus

CWE

Referencias

JSON original (NVD)

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      "value": "Incus is a system container and virtual machine manager. Incus instances have an option to provide credentials to systemd in the guest. For containers, this is handled through a shared directory. Prior to version 6.23.0, an attacker can set a configuration key named something like `systemd.credential.../../../../../../root/.bashrc` to cause Incus to write outside of the `credentials` directory associated with the container. This makes use of the fact that the Incus syntax for such credentials is `systemd.credential.XYZ` where `XYZ` can itself contain more periods. While it's not possible to read any data this way, it's possible to write to arbitrary files as root, enabling both privilege escalation and denial of service attacks. Version 6.23.0 fixes the issue."
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      "value": "Incus es un gestor de contenedores de sistema y de máquinas virtuales. Las instancias de Incus tienen una opción para proporcionar credenciales a systemd en el invitado. Para los contenedores, esto se gestiona a través de un directorio compartido. Antes de la versión 6.23.0, un atacante puede establecer una clave de configuración con un nombre similar a systemd.credential.../../../../../../root/.bashrc para hacer que Incus escriba fuera del directorio 'credentials' asociado con el contenedor. Esto aprovecha el hecho de que la sintaxis de Incus para dichas credenciales es systemd.credential.XYZ, donde XYZ puede contener más puntos. Si bien no es posible leer ningún dato de esta manera, es posible escribir en archivos arbitrarios como root, lo que permite tanto la escalada de privilegios como los ataques de denegación de servicio. La versión 6.23.0 corrige el problema."
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  "lastModified": "2026-06-17T10:38:20.773",
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