cve-2023-28840
Vulnerability from cvelistv5
Published
2023-04-04 21:13
Modified
2024-08-02 13:51
Severity
7.5 (High) - cvssV3_1 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:L
Summary
moby/moby's dockerd daemon encrypted overlay network may be unauthenticated
References
SourceURLTags
security-advisories@github.comhttps://github.com/moby/libnetwork/security/advisories/GHSA-gvm4-2qqg-m333Vendor Advisory
security-advisories@github.comhttps://github.com/moby/moby/issues/43382Exploit, Issue Tracking, Third Party Advisory
security-advisories@github.comhttps://github.com/moby/moby/pull/45118Issue Tracking, Patch
security-advisories@github.comhttps://github.com/moby/moby/security/advisories/GHSA-232p-vwff-86mpMitigation, Vendor Advisory
security-advisories@github.comhttps://github.com/moby/moby/security/advisories/GHSA-33pg-m6jh-5237Not Applicable
security-advisories@github.comhttps://github.com/moby/moby/security/advisories/GHSA-6wrf-mxfj-pf5pNot Applicable
security-advisories@github.comhttps://github.com/moby/moby/security/advisories/GHSA-vwm3-crmr-xfxwVendor Advisory
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LYZOKMMVX4SIEHPJW3SJUQGMO5YZCPHC/
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XNF4OLYZRQE75EB5TW5N42FSXHBXGWFE/
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZTE4ITXXPIWZEQ4HYQCB6N6GZIMWXDAI/
Impacted products
VendorProduct
mobymoby
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
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        "title": "CVE Program Container"
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    "cna": {
      "affected": [
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          "product": "moby",
          "vendor": "moby",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.12.0, \u003c 20.10.24"
            },
            {
              "status": "affected",
              "version": "\u003e= 23.0.0, \u003c 23.0.3"
            }
          ]
        }
      ],
      "descriptions": [
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          "lang": "en",
          "value": "Moby is an open source container framework developed by Docker Inc. that is distributed as Docker, Mirantis Container Runtime, and various other downstream projects/products. The Moby daemon component (`dockerd`), which is developed as moby/moby, is commonly referred to as *Docker*.\n\nSwarm Mode, which is compiled in and delivered by default in dockerd and is thus present in most major Moby downstreams, is a simple, built-in container orchestrator that is implemented through a combination of SwarmKit and supporting network code.\n\nThe overlay network driver is a core feature of Swarm Mode, providing isolated virtual LANs that allow communication between containers and services across the cluster. This driver is an implementation/user of VXLAN, which encapsulates link-layer (Ethernet) frames in UDP datagrams that tag the frame with a VXLAN Network ID (VNI) that identifies the originating overlay network. In addition, the overlay network driver supports an optional, off-by-default encrypted mode, which is especially useful when VXLAN packets traverses an untrusted network between nodes.\n\nEncrypted overlay networks function by encapsulating the VXLAN datagrams through the use of the IPsec Encapsulating Security Payload protocol in Transport mode. By deploying IPSec encapsulation, encrypted overlay networks gain the additional properties of source authentication through cryptographic proof, data integrity through check-summing, and confidentiality through encryption.\n\nWhen setting an endpoint up on an encrypted overlay network, Moby installs three iptables (Linux kernel firewall) rules that enforce both incoming and outgoing IPSec. These rules rely on the u32 iptables extension provided by the xt_u32 kernel module to directly filter on a VXLAN packet\u0027s VNI field, so that IPSec guarantees can be enforced on encrypted overlay networks without interfering with other overlay networks or other users of VXLAN.\n\nTwo iptables rules serve to filter incoming VXLAN datagrams with a VNI that corresponds to an encrypted network and discards unencrypted datagrams. The rules are appended to the end of the INPUT filter chain, following any rules that have been previously set by the system administrator. Administrator-set rules take precedence over the rules Moby sets to discard unencrypted VXLAN datagrams, which can potentially admit unencrypted datagrams that should have been discarded.\n\nThe injection of arbitrary Ethernet frames can enable a Denial of Service attack. A sophisticated attacker may be able to establish a UDP or TCP connection by way of the container\u2019s outbound gateway that would otherwise be blocked by a stateful firewall, or carry out other escalations beyond simple injection by smuggling packets into the overlay network.\n\nPatches are available in Moby releases 23.0.3 and 20.10.24. As Mirantis Container Runtime\u0027s 20.10 releases are numbered differently, users of that platform should update to 20.10.16.\n\nSome workarounds are available. Close the VXLAN port (by default, UDP port 4789) to incoming traffic at the Internet boundary to prevent all VXLAN packet injection, and/or ensure that the `xt_u32` kernel module is available on all nodes of the Swarm cluster."
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            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:L",
            "version": "3.1"
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              "description": "CWE-636: Not Failing Securely (\u0027Failing Open\u0027)",
              "lang": "en",
              "type": "CWE"
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          "tags": [
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          ],
          "url": "https://github.com/moby/moby/security/advisories/GHSA-232p-vwff-86mp"
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        },
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        },
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          "name": "https://github.com/moby/moby/issues/43382",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/moby/moby/issues/43382"
        },
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          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/moby/moby/pull/45118"
        },
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        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LYZOKMMVX4SIEHPJW3SJUQGMO5YZCPHC/"
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        }
      ],
      "source": {
        "advisory": "GHSA-232p-vwff-86mp",
        "discovery": "UNKNOWN"
      },
      "title": "moby/moby\u0027s dockerd daemon encrypted overlay network may be unauthenticated"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-28840",
    "datePublished": "2023-04-04T21:13:03.347Z",
    "dateReserved": "2023-03-24T16:25:34.466Z",
    "dateUpdated": "2024-08-02T13:51:38.250Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1",
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El componente Moby daemon (`dockerd`), que se desarrolla como moby/moby, se conoce com\u00fanmente como *Docker*. El modo Swarm, que se compila y entrega de forma predeterminada en Dockerd y, por lo tanto, est\u00e1 presente en la mayor\u00eda de las principales versiones de Moby, es un orquestador de contenedores integrado y simple que se implementa mediante una combinaci\u00f3n de SwarmKit y c\u00f3digo de red de soporte. El controlador de red superpuesta es una caracter\u00edstica central del modo Swarm, que proporciona LAN virtuales aisladas que permiten la comunicaci\u00f3n entre contenedores y servicios en todo el cl\u00faster. Este controlador es una implementaci\u00f3n/usuario de VXLAN, que encapsula tramas de capa de enlace (Ethernet) en datagramas UDP que etiquetan la trama con un ID de red VXLAN (VNI) que identifica la red superpuesta de origen. Adem\u00e1s, el controlador de red superpuesta admite un modo cifrado opcional, desactivado de forma predeterminada, que resulta especialmente \u00fatil cuando los paquetes VXLAN atraviesan una red que no es de confianza entre nodos. Las redes superpuestas cifradas funcionan encapsulando los datagramas VXLAN mediante el uso del protocolo IPsec Encapsulating Security Payload en modo Transporte. Al implementar la encapsulaci\u00f3n IPSec, las redes superpuestas cifradas obtienen propiedades adicionales de autenticaci\u00f3n de origen mediante prueba criptogr\u00e1fica, integridad de datos mediante suma de verificaci\u00f3n y confidencialidad mediante cifrado. Al configurar un endpoint en una red superpuesta cifrada, Moby instala tres reglas de iptables (firewall del kernel de Linux) que aplican IPSec tanto entrante como saliente. Estas reglas se basan en la extensi\u00f3n u32 iptables proporcionada por el m\u00f3dulo del kernel xt_u32 para filtrar directamente el campo VNI de un paquete VXLAN, de modo que las garant\u00edas IPSec se puedan aplicar en redes superpuestas cifradas sin interferir con otras redes superpuestas u otros usuarios de VXLAN. Dos reglas de iptables sirven para filtrar datagramas VXLAN entrantes con un VNI que corresponde a una red cifrada y descarta los datagramas no cifrados. Las reglas se agregan al final de la cadena de filtros de ENTRADA, siguiendo las reglas que haya establecido previamente el administrador del sistema. Las reglas establecidas por el administrador tienen prioridad sobre las reglas que Moby establece para descartar datagramas VXLAN no cifrados, que potencialmente pueden admitir datagramas no cifrados que deber\u00edan haberse descartado. La inyecci\u00f3n de tramas Ethernet arbitrarias puede permitir un ataque de denegaci\u00f3n de servicio. 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Cierre el puerto VXLAN (de forma predeterminada, el puerto UDP 4789) al tr\u00e1fico entrante en el l\u00edmite de Internet para evitar toda inyecci\u00f3n de paquetes VXLAN y/o aseg\u00farese de que el m\u00f3dulo del kernel `xt_u32` est\u00e9 disponible en todos los nodos del cl\u00faster Swarm.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\",\"baseScore\":8.7,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":2.2,\"impactScore\":5.8},{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:L\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":2.2,\"impactScore\":4.7}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-420\"},{\"lang\":\"en\",\"value\":\"CWE-636\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-203\"},{\"lang\":\"en\",\"value\":\"CWE-755\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mobyproject:moby:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.12.0\",\"versionEndExcluding\":\"20.10.24\",\"matchCriteriaId\":\"E7027BE5-D31C-40E5-81A4-A91028A687B3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mobyproject:moby:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"23.0.0\",\"versionEndExcluding\":\"23.0.3\",\"matchCriteriaId\":\"911C8E32-9EC6-4AAD-93CD-C1880D06E3AD\"}]}]}],\"references\":[{\"url\":\"https://github.com/moby/libnetwork/security/advisories/GHSA-gvm4-2qqg-m333\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://github.com/moby/moby/issues/43382\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/moby/moby/pull/45118\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Issue Tracking\",\"Patch\"]},{\"url\":\"https://github.com/moby/moby/security/advisories/GHSA-232p-vwff-86mp\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Mitigation\",\"Vendor Advisory\"]},{\"url\":\"https://github.com/moby/moby/security/advisories/GHSA-33pg-m6jh-5237\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Not Applicable\"]},{\"url\":\"https://github.com/moby/moby/security/advisories/GHSA-6wrf-mxfj-pf5p\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Not Applicable\"]},{\"url\":\"https://github.com/moby/moby/security/advisories/GHSA-vwm3-crmr-xfxw\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LYZOKMMVX4SIEHPJW3SJUQGMO5YZCPHC/\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XNF4OLYZRQE75EB5TW5N42FSXHBXGWFE/\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZTE4ITXXPIWZEQ4HYQCB6N6GZIMWXDAI/\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}


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