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CVE-2021-32802

CRITICAL

9.3

Descricao

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`.

Detalhes CVE

Pontuacao CVSS v3.19.3

SeveridadeCRITICAL

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

Vetor de ataqueNETWORK

ComplexidadeLOW

Privilegios necessariosNONE

Interacao do usuarioNONE

Publicado9/7/2021

Ultima modificacao11/21/2024

Fontenvd

Avistamentos honeypot0

Produtos afetados

nextcloud:nextcloud_server

Fraquezas (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)

Correlacoes IOC

Sem correlacoes registradas

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