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CVE-2021-32802

CRITICAL

9.3

Descripcion

Nextcloud server is an open source, self hosted personal cloud. Nextcloud supports rendering image previews for user provided file content. For some image types, the Nextcloud server was invoking a third-party library that wasn't suited for untrusted user-supplied content. There are several security concerns with passing user-generated content to this library, such as Server-Side-Request-Forgery, file disclosure or potentially executing code on the system. The risk depends on your system configuration and the installed library version. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. These versions do not use this library anymore. As a workaround users may disable previews by setting `enable_previews` to `false` in `config.php`.

Detalles CVE

Puntuacion CVSS v3.19.3

SeveridadCRITICAL

Vector CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosNONE

Interaccion usuarioNONE

Publicado9/7/2021

Ultima modificacion11/21/2024

Fuentenvd

Avistamientos honeypot0

Productos afectados

nextcloud:nextcloud_server

Debilidades (CWE)

CWE-829CWE-829

Referencias

https://docs.nextcloud.com/server/21/admin_manual/configuration_files/previews_configuration.html#disabling-previews(security-advisories@github.com)

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m682-v4g9-wrq7(security-advisories@github.com)

https://hackerone.com/reports/1261413(security-advisories@github.com)

https://security.gentoo.org/glsa/202208-17(security-advisories@github.com)

https://docs.nextcloud.com/server/21/admin_manual/configuration_files/previews_configuration.html#disabling-previews(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m682-v4g9-wrq7(af854a3a-2127-422b-91ae-364da2661108)

https://hackerone.com/reports/1261413(af854a3a-2127-422b-91ae-364da2661108)

https://security.gentoo.org/glsa/202208-17(af854a3a-2127-422b-91ae-364da2661108)

Correlaciones IOC

Sin correlaciones registradas

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