fkie_cve-2020-29481
Vulnerability from fkie_nvd
Published
2020-12-15 18:15
Modified
2024-11-21 05:24
Severity ?
Summary
An issue was discovered in Xen through 4.14.x. Access rights of Xenstore nodes are per domid. Unfortunately, existing granted access rights are not removed when a domain is being destroyed. This means that a new domain created with the same domid will inherit the access rights to Xenstore nodes from the previous domain(s) with the same domid. Because all Xenstore entries of a guest below /local/domain/<domid> are being deleted by Xen tools when a guest is destroyed, only Xenstore entries of other guests still running are affected. For example, a newly created guest domain might be able to read sensitive information that had belonged to a previously existing guest domain. Both Xenstore implementations (C and Ocaml) are vulnerable.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| xen | xen | * | |
| debian | debian_linux | 10.0 | |
| fedoraproject | fedora | 32 | |
| fedoraproject | fedora | 33 |
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "An issue was discovered in Xen through 4.14.x. Access rights of Xenstore nodes are per domid. Unfortunately, existing granted access rights are not removed when a domain is being destroyed. This means that a new domain created with the same domid will inherit the access rights to Xenstore nodes from the previous domain(s) with the same domid. Because all Xenstore entries of a guest below /local/domain/\u003cdomid\u003e are being deleted by Xen tools when a guest is destroyed, only Xenstore entries of other guests still running are affected. For example, a newly created guest domain might be able to read sensitive information that had belonged to a previously existing guest domain. Both Xenstore implementations (C and Ocaml) are vulnerable."
},
{
"lang": "es",
"value": "Se detect\u00f3 un problema en Xen versiones hasta 4.14.x.\u0026#xa0;Los derechos de acceso de los nodos de Xenstore son per domid. Desafortunadamente, los derechos de acceso concedidos existentes no son eliminados cuando un dominio ha sido destruido.\u0026#xa0;Esto significa que un nuevo dominio creado con el mismo domid heredar\u00e1 los derechos de acceso a los nodos de Xenstore de los dominios anteriores con el mismo domid.\u0026#xa0;Debido a que todas las entradas de Xenstore de un invitado por debajo /local/domain/(domid) han sido eliminadas por las herramientas Xen, cuando un invitado es destruido; solo las entradas Xenstore de otros invitados que a\u00fan se est\u00e9n ejecutando est\u00e1n afectadas.\u0026#xa0;Por ejemplo, un dominio invitado reci\u00e9n creado puede ser capaz de leer informaci\u00f3n confidencial que perteneciera a un dominio invitado previamente existente.\u0026#xa0;Ambas implementaciones de Xenstore (C y Ocaml) son vulnerables"
}
],
"id": "CVE-2020-29481",
"lastModified": "2024-11-21T05:24:04.633",
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"published": "2020-12-15T18:15:15.067",
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"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
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"value": "CWE-269"
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],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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