fkie_cve-2020-11743
Vulnerability from fkie_nvd
Published
2020-04-14 13:15
Modified
2024-11-21 04:58
Severity ?
Summary
An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.
References
Impacted products
{
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"value": "An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain."
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"value": "Se detect\u00f3 un problema en Xen versiones hasta 4.13.x, permitiendo a usuarios invitados del Sistema Operativo causar una denegaci\u00f3n de servicio debido a una ruta de error incorrecta en GNTTABOP_map_grant. Es esperado que las operaciones de la tabla de concesiones devuelvan 0 para el \u00e9xito y un n\u00famero negativo para los errores. Algunos corchetes mal colocados causan que una ruta de error devuelva 1 en lugar de un valor negativo. El c\u00f3digo de la tabla de concesi\u00f3n en Linux trata esta condici\u00f3n como exitosa y contin\u00faa incorrectamente con un estado inicializado. Un invitado con errores o malicioso puede construir su tabla de concesi\u00f3n de tal manera que, cuando un dominio del backend intente asignar una concesi\u00f3n, llegue a la ruta de error incorrecta. Esto bloquear\u00e1 un dom0 o un dominio del backend basado en Linux."
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"lastModified": "2024-11-21T04:58:31.960",
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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.