CVE-2020-29480

{"id": "CVE-2020-29480", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 2.1, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 2.3, "attackVector": "LOCAL", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 0.8}]}, "published": "2020-12-15T18:15:15.007", "references": [{"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/", "source": "cve@mitre.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/", "source": "cve@mitre.org"}, {"url": "https://www.debian.org/security/2020/dsa-4812", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://xenbits.xenproject.org/xsa/advisory-115.html", "tags": ["Patch", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.debian.org/security/2020/dsa-4812", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://xenbits.xenproject.org/xsa/advisory-115.html", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-862"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in Xen through 4.14.x. Neither xenstore implementation does any permission checks when reporting a xenstore watch event. A guest administrator can watch the root xenstored node, which will cause notifications for every created, modified, and deleted key. A guest administrator can also use the special watches, which will cause a notification every time a domain is created and destroyed. Data may include: number, type, and domids of other VMs; existence and domids of driver domains; numbers of virtual interfaces, block devices, vcpus; existence of virtual framebuffers and their backend style (e.g., existence of VNC service); Xen VM UUIDs for other domains; timing information about domain creation and device setup; and some hints at the backend provisioning of VMs and their devices. The watch events do not contain values stored in xenstore, only key names. A guest administrator can observe non-sensitive domain and device lifecycle events relating to other guests. This information allows some insight into overall system configuration (including the number and general nature of other guests), and configuration of other guests (including the number and general nature of other guests' devices). This information might be commercially interesting or might make other attacks easier. There is not believed to be exposure of sensitive data. Specifically, there is no exposure of VNC passwords, port numbers, pathnames in host and guest filesystems, cryptographic keys, or within-guest data."}, {"lang": "es", "value": "Se detect\u00f3 un problema en Xen versiones hasta 4.14.x. Ninguna implementaci\u00f3n de xenstore lleva a cabo comprobaciones de permisos al reportar un evento de observaci\u00f3n de xenstore. Un administrador invitado puede visualizar el nodo xenstored root, lo que causar\u00e1 notificaciones para cada clave dise\u00f1ada, modificada y eliminada. Un administrador invitado tambi\u00e9n puede usar los relojes especiales, que causar\u00e1n una notificaci\u00f3n cada vez que el dominio es creado y destruido. Los datos pueden incluir: n\u00famero, tipo y domids de otras VM; existencia y domids de dominios de controladores; n\u00famero de interfaces virtuales, dispositivos de bloque, vcpus; existencia de framebuffers virtuales y su estilo de backend (por ejemplo, existencia de servicio VNC); UUID de Xen VM para otros dominios; informaci\u00f3n de sincronizaci\u00f3n sobre la creaci\u00f3n del dominio y la configuraci\u00f3n del dispositivo; y algunas sugerencias sobre el aprovisionamiento de backend de m\u00e1quinas virtuales y sus dispositivos. Los eventos de vigilancia no contienen valores almacenados en xenstore, solo nombres de claves. Un administrador invitado puede observar eventos no confidenciales del ciclo de vida del dispositivo y del dominio relacionados con otros invitados. Esta informaci\u00f3n permite tener una idea de la configuraci\u00f3n general del sistema (incluido el n\u00famero y la naturaleza general de otros invitados) y la configuraci\u00f3n de otros invitados (incluido el n\u00famero y la naturaleza general de los dispositivos de otros invitados). Esta informaci\u00f3n puede resultar comercialmente interesante o facilitar otros ataques. No se cree que haya exposici\u00f3n de datos confidenciales. Espec\u00edficamente, no se exponen las contrase\u00f1as de VNC, los n\u00fameros de puerto, los nombres de ruta en los sistemas de archivos del host e invitado, las claves criptogr\u00e1ficas o los datos internos del invitado"}], "lastModified": "2024-11-21T05:24:04.470", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2D769F4A-98C6-4544-AC04-3D8600C17BBB", "versionEndIncluding": "4.14.0"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "36D96259-24BD-44E2-96D9-78CE1D41F956"}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}