CVE-2022-24769 (GCVE-0-2022-24769)

Vulnerability from cvelistv5 – Published: 2022-03-24 00:00 – Updated: 2024-08-03 04:20
VLAI
Title
Default inheritable capabilities for linux container should be empty
Summary
Moby is an open-source project created by Docker to enable and accelerate software containerization. A bug was found in Moby (Docker Engine) prior to version 20.10.14 where containers were incorrectly started with non-empty inheritable Linux process capabilities, creating an atypical Linux environment and enabling programs with inheritable file capabilities to elevate those capabilities to the permitted set during `execve(2)`. Normally, when executable programs have specified permitted file capabilities, otherwise unprivileged users and processes can execute those programs and gain the specified file capabilities up to the bounding set. Due to this bug, containers which included executable programs with inheritable file capabilities allowed otherwise unprivileged users and processes to additionally gain these inheritable file capabilities up to the container's bounding set. Containers which use Linux users and groups to perform privilege separation inside the container are most directly impacted. This bug did not affect the container security sandbox as the inheritable set never contained more capabilities than were included in the container's bounding set. This bug has been fixed in Moby (Docker Engine) 20.10.14. Running containers should be stopped, deleted, and recreated for the inheritable capabilities to be reset. This fix changes Moby (Docker Engine) behavior such that containers are started with a more typical Linux environment. As a workaround, the entry point of a container can be modified to use a utility like `capsh(1)` to drop inheritable capabilities prior to the primary process starting.
Severity
5.9 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE
  • CWE-732 - Incorrect Permission Assignment for Critical Resource
Assigner
References
Impacted products
Vendor Product Version
moby moby Affected: < 20.10.14
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      "id": "CVE-2022-24769",
      "lastModified": "2024-11-21T06:51:03.593",
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      "published": "2022-03-24T20:15:09.493",
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      "sourceIdentifier": "security-advisories@github.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"security-advisories@github.com\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-732\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-732\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-24769\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2022-03-24T20:15:09.493\",\"lastModified\":\"2024-11-21T06:51:03.593\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Moby is an open-source project created by Docker to enable and accelerate software containerization. A bug was found in Moby (Docker Engine) prior to version 20.10.14 where containers were incorrectly started with non-empty inheritable Linux process capabilities, creating an atypical Linux environment and enabling programs with inheritable file capabilities to elevate those capabilities to the permitted set during `execve(2)`. Normally, when executable programs have specified permitted file capabilities, otherwise unprivileged users and processes can execute those programs and gain the specified file capabilities up to the bounding set. Due to this bug, containers which included executable programs with inheritable file capabilities allowed otherwise unprivileged users and processes to additionally gain these inheritable file capabilities up to the container\u0027s bounding set. Containers which use Linux users and groups to perform privilege separation inside the container are most directly impacted. This bug did not affect the container security sandbox as the inheritable set never contained more capabilities than were included in the container\u0027s bounding set. This bug has been fixed in Moby (Docker Engine) 20.10.14. Running containers should be stopped, deleted, and recreated for the inheritable capabilities to be reset. This fix changes Moby (Docker Engine) behavior such that containers are started with a more typical Linux environment. As a workaround, the entry point of a container can be modified to use a utility like `capsh(1)` to drop inheritable capabilities prior to the primary process starting.\"},{\"lang\":\"es\",\"value\":\"Moby es un proyecto de c\u00f3digo abierto creado por Docker para permitir y acelerar la contenci\u00f3n de software. Fue encontrado un bug en Moby (Docker Engine) versiones anteriores a 20.10.14, en el que los contenedores eran iniciados incorrectamente con capacidades de proceso Linux heredables no vac\u00edas, creando un entorno Linux at\u00edpico y permitiendo que los programas con capacidades de archivo heredables elevaran esas capacidades al conjunto permitido durante \\\"execve(2)\\\". Normalmente, cuando los programas ejecutables presentan capacidades de archivo permitidas especificadas, los usuarios y procesos no privilegiados pueden ejecutar esos programas y conseguir las capacidades de archivo especificadas hasta el conjunto permitido. Debido a este bug, los contenedores que inclu\u00edan programas ejecutables con capacidades de archivo heredables permit\u00edan que usuarios y procesos no privilegiados consiguieran adicionalmente estas capacidades de archivo heredables hasta el conjunto de l\u00edmites del contenedor. Los contenedores que usan usuarios y grupos de Linux para llevar a cabo la separaci\u00f3n de privilegios dentro del contenedor son los m\u00e1s directamente afectados. Este bug no afectaba a la caja de arena de seguridad del contenedor, ya que el conjunto heredable nunca conten\u00eda m\u00e1s capacidades que las incluidas en el conjunto delimitador del contenedor. Este bug ha sido corregido en Moby (Docker Engine) versi\u00f3n 20.10.14. Los contenedores en ejecuci\u00f3n deben detenerse, eliminarse y volver a crearse para que sean restablecidas las capacidades heredables. Esta correcci\u00f3n cambia el comportamiento de Moby (Docker Engine) para que los contenedores se inicien con un entorno Linux m\u00e1s t\u00edpico. Como medida de mitigaci\u00f3n, el punto de entrada de un contenedor puede modificarse para usar una utilidad como \\\"capsh(1)\\\" para eliminar las capacidades heredables antes de que sea iniciado el proceso 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Party Advisory\"]}]}}"
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.