cve-2023-28842
Vulnerability from cvelistv5
Published
2023-04-04 21:07
Modified
2024-08-02 13:51
Severity ?
6.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
Summary
moby/moby's dockerd daemon encrypted overlay network with a single endpoint is unauthenticated
References
security-advisories@github.comhttps://github.com/moby/libnetwork/security/advisories/GHSA-gvm4-2qqg-m333Vendor Advisory
security-advisories@github.comhttps://github.com/moby/moby/security/advisories/GHSA-232p-vwff-86mpNot Applicable
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-pf5pMitigation, Vendor Advisory
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
mobymoby
Show details on NVD website

To clipboard 

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    "dateReserved": "2023-03-24T16:25:34.466Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-28842\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2023-04-04T22:15:08.007\",\"lastModified\":\"2023-09-15T21:15:10.487\",\"vulnStatus\":\"Modified\",\"descriptions\":[{\"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. 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If encrypted overlay networks are in exclusive use, block UDP port 4789 from traffic that has not been validated by IPSec.\"},{\"lang\":\"es\",\"value\":\"Moby) es un framework de contenedores de c\u00f3digo abierto desarrollado por Docker Inc. que se distribuye como Docker, Mirantis Container Runtime y varios otros proyectos/productos posteriores. 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 simple e integrado que se implementa mediante una combinaci\u00f3n de SwarmKit y soportando un c\u00f3digo de red. El controlador de red \\\"superpuesto\\\" 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 los metadatos de VXLAN, incluido 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 iptables `u32` 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. El controlador `overlay` define de forma din\u00e1mica y perezosa la configuraci\u00f3n del kernel para la red VXLAN en cada nodo a medida que los contenedores se conectan y desconectan. Las rutas y los par\u00e1metros de cifrado solo se definen para los nodos de destino que participan en la red. Las reglas de iptables que impiden que las redes superpuestas cifradas acepten paquetes no cifrados no se crean hasta que haya un interlocutor disponible con el que comunicarse. Las redes superpuestas cifradas aceptan silenciosamente datagramas VXLAN de texto sin cifrar etiquetados con el VNI de una red superpuesta cifrada. Como resultado, es posible inyectar tramas Ethernet arbitrarias en la red superpuesta cifrada encapsul\u00e1ndolas en datagramas VXLAN. Las implicaciones de esto pueden ser bastante nefastas, y se debe hacer referencia a GHSA-vwm3-crmr-xfxw para una exploraci\u00f3n m\u00e1s profunda. Los parches est\u00e1n disponibles en las versiones 23.0.3 y 20.10.24 de Moby. Como las versiones 20.10 de Mirantis Container Runtime tienen numeraci\u00f3n diferente, los usuarios de esa plataforma deben actualizar a la versi\u00f3n 20.10.16. 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  }
}


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