CVE-2021-32679 (GCVE-0-2021-32679)
Vulnerability from cvelistv5
Published
2021-07-12 12:50
Modified
2024-08-03 23:25
Severity ?
3.5 (Low) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Summary
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.0.11, and 21.0.3, filenames where not escaped by default in controllers using `DownloadResponse`. When a user-supplied filename was passed unsanitized into a `DownloadResponse`, this could be used to trick users into downloading malicious files with a benign file extension. This would show in UI behaviours where Nextcloud applications would display a benign file extension (e.g. JPEG), but the file will actually be downloaded with an executable file extension. The vulnerability is patched in versions 19.0.13, 20.0.11, and 21.0.3. Administrators of Nextcloud instances do not have a workaround available, but developers of Nextcloud apps may manually escape the file name before passing it into `DownloadResponse`.
References
security-advisories@github.comhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-3hjp-26x8-mhf6Third Party Advisory
security-advisories@github.comhttps://github.com/nextcloud/server/pull/27354Patch, Third Party Advisory
security-advisories@github.comhttps://hackerone.com/reports/1215263Permissions Required
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/
security-advisories@github.comhttps://security.gentoo.org/glsa/202208-17Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3hjp-26x8-mhf6Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/nextcloud/server/pull/27354Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/1215263Permissions Required
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202208-17Third Party Advisory
Impacted products
Vendor Product Version
nextcloud security-advisories Version: < 19.0.13
Version: >= 20.0.0, < 20.0.11
Version: >= 21.0.0, < 21.0.3
 Create a notification for this product.
Show details on NVD website

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Administrators of Nextcloud instances do not have a workaround available, but developers of Nextcloud apps may manually escape the file name before passing it into `DownloadResponse`.\"},{\"lang\":\"es\",\"value\":\"Nextcloud Server es un paquete de Nextcloud que maneja el almacenamiento de datos. En versiones anteriores a la 19.0.13, 20.0.11 y 21.0.3, los nombres de archivo no se escapaban por defecto en los controladores que usaban \\\"DownloadResponse\\\". Cuando un nombre de archivo suministrado por el usuario se pasaba sin sanear en un \\\"DownloadResponse\\\", esto podía ser usado para engañar a usuarios para que descargaran archivos maliciosos con una extensión de archivo benigna. Esto se reflejaba en comportamientos de la interfaz de usuario en los que las aplicaciones de Nextcloud mostraban una extensión de archivo benigna (por ejemplo, JPEG), pero el archivo se descargaba en realidad con una extensión de archivo ejecutable. La vulnerabilidad está parcheada En versiones 19.0.13, 20.0.11 y 21.0.3. Los administradores de las instancias de Nextcloud no presentan una solución disponible, pero los desarrolladores de aplicaciones Nextcloud pueden escapar manualmente el nombre del archivo antes de pasarlo a 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}


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