CVE-2023-25173 (GCVE-0-2023-25173)

Vulnerability from cvelistv5 – Published: 2023-02-16 14:09 – Updated: 2025-03-10 21:10
VLAI
Title
containerd supplementary groups are not set up properly
Summary
containerd is an open source container runtime. A bug was found in containerd prior to versions 1.6.18 and 1.5.18 where supplementary groups are not set up properly inside a container. If an attacker has direct access to a container and manipulates their supplementary group access, they may be able to use supplementary group access to bypass primary group restrictions in some cases, potentially gaining access to sensitive information or gaining the ability to execute code in that container. Downstream applications that use the containerd client library may be affected as well. This bug has been fixed in containerd v1.6.18 and v.1.5.18. Users should update to these versions and recreate containers to resolve this issue. Users who rely on a downstream application that uses containerd's client library should check that application for a separate advisory and instructions. As a workaround, ensure that the `"USER $USERNAME"` Dockerfile instruction is not used. Instead, set the container entrypoint to a value similar to `ENTRYPOINT ["su", "-", "user"]` to allow `su` to properly set up supplementary groups.
Severity
5.3 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Vendor Product Version
containerd containerd Affected: < 1.5.18
Affected: >= 1.6.0, < 1.6.18
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      "version": "3"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-25173\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2023-02-16T15:15:20.057\",\"lastModified\":\"2026-06-17T05:40:50.410\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"containerd is an open source container runtime. A bug was found in containerd prior to versions 1.6.18 and 1.5.18 where supplementary groups are not set up properly inside a container. If an attacker has direct access to a container and manipulates their supplementary group access, they may be able to use supplementary group access to bypass primary group restrictions in some cases, potentially gaining access to sensitive information or gaining the ability to execute code in that container. Downstream applications that use the containerd client library may be affected as well.\\n\\nThis bug has been fixed in containerd v1.6.18 and v.1.5.18. Users should update to these versions and recreate containers to resolve this issue. Users who rely on a downstream application that uses containerd\u0027s client library should check that application for a separate advisory and instructions. As a workaround, ensure that the `\\\"USER $USERNAME\\\"` Dockerfile instruction is not used. Instead, set the container entrypoint to a value similar to `ENTRYPOINT [\\\"su\\\", \\\"-\\\", \\\"user\\\"]` to allow `su` to properly set up supplementary groups.\"},{\"lang\":\"es\",\"value\":\"Containerd es contenedor de c\u00f3digo abierto en tiempo de ejecuci\u00f3n. Se encontr\u00f3 un error en Containerd antes de las versiones 1.6.18 y 1.5.18 donde los grupos suplementarios no est\u00e1n configurados correctamente dentro de un contenedor. Si un atacante tiene acceso directo a un contenedor y manipula su acceso de grupo suplementario, es posible que pueda utilizar el acceso de grupo suplementario para eludir las restricciones del grupo primario en algunos casos, obteniendo potencialmente acceso a informaci\u00f3n confidencial o obteniendo la capacidad de ejecutar c\u00f3digo en ese contenedor. Las aplicaciones posteriores que utilizan la librer\u00eda cliente en containerd tambi\u00e9n pueden verse afectadas. Este error se ha solucionado en Containerd v1.6.18 y v.1.5.18. Los usuarios deben actualizar a estas versiones y volver a crear containers para resolver este problema. Los usuarios que dependen de una aplicaci\u00f3n posterior que utiliza la librer\u00eda cliente de Containerd deben verificar esa aplicaci\u00f3n para obtener avisos e instrucciones por separado. Como workaround, aseg\u00farese de que no se utilice la instrucci\u00f3n de Dockerfile `\\\"USER $USERNAME\\\"`. En su lugar, establezca el punto de entrada del contenedor en un valor similar a `ENTRYPOINT [\\\"su\\\", \\\"-\\\", \\\"user\\\"]` para permitir que `su` configure correctamente grupos suplementarios.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"containerd\",\"product\":\"containerd\",\"versions\":[{\"version\":\"\u003c 1.5.18\",\"status\":\"affected\"},{\"version\":\"\u003e= 1.6.0, \u003c 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Applicable\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LYZOKMMVX4SIEHPJW3SJUQGMO5YZCPHC/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XNF4OLYZRQE75EB5TW5N42FSXHBXGWFE/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZTE4ITXXPIWZEQ4HYQCB6N6GZIMWXDAI/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.benthamsgaze.org/2022/08/22/vulnerability-in-linux-containers-investigation-and-mitigation/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-03T01:42:08+00:00",
      "cve": "CVE-2023-25173",
      "id": "CVE-2023-25173",
      "initial_release_date": "2023-02-15T00:00:00+00:00",
      "product_status:fixed": "477",
      "product_status:known_affected": "113",
      "product_status:known_not_affected": "2345",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "containerd: Supplementary groups are not set up properly",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-25173.json",
      "version": "3"
    },
    "vulnrichment": {
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      "cveMetadata": "{\"cveId\": \"CVE-2023-25173\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"GitHub_M\", \"dateReserved\": \"2023-02-03T16:59:18.247Z\", \"datePublished\": \"2023-02-16T14:09:12.073Z\", \"dateUpdated\": \"2025-03-10T21:10:38.648Z\"}",
      "dataType": "CVE_RECORD",
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    }
  }
}



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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.