CVE-2021-32688 (GCVE-0-2021-32688)

Vulnerability from cvelistv5 – Published: 2021-07-12 13:45 – Updated: 2024-08-03 23:25
VLAI?
Summary
Nextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server supports application specific tokens for authentication purposes. These tokens are supposed to be granted to a specific applications (e.g. DAV sync clients), and can also be configured by the user to not have any filesystem access. Due to a lacking permission check, the tokens were able to change their own permissions in versions prior to 19.0.13, 20.0.11, and 21.0.3. Thus fileystem limited tokens were able to grant themselves access to the filesystem. The issue is patched in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds aside from upgrading.
Severity ?
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
nextcloud security-advisories Affected: < 19.0.13
Affected: >= 20.0.0, < 20.0.11
Affected: >= 21.0.0, < 21.0.3
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There are no known workarounds aside from upgrading.\"},{\"lang\":\"es\",\"value\":\"Nextcloud Server es un paquete de Nextcloud que maneja el almacenamiento de datos. Nextcloud Server soporta tokens espec\u00edficos de la aplicaci\u00f3n para fines de autenticaci\u00f3n. Estos tokens se supone que le conceden a una aplicaci\u00f3n espec\u00edfica (por ejemplo, clientes de sincronizaci\u00f3n DAV), y tambi\u00e9n pueden ser configurados por el usuario para no tener ning\u00fan acceso al sistema de archivos. Debido a una falta de comprobaci\u00f3n de permisos, los tokens pod\u00edan cambiar sus propios permisos en versiones anteriores a 19.0.13, 20.0.11 y 21.0.3. As\u00ed, los tokens limitados al sistema de archivos pod\u00edan concederse a s\u00ed mismos acceso al sistema de archivos. El problema est\u00e1 parcheado En versiones 19.0.13, 20.0.11 y 21.0.3. 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  }
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.