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CVE-2021-32688

HIGH

8.8

Descricao

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.

Detalhes CVE

Pontuacao CVSS v3.18.8

SeveridadeHIGH

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

Vetor de ataqueNETWORK

ComplexidadeLOW

Privilegios necessariosLOW

Interacao do usuarioNONE

Publicado7/12/2021

Ultima modificacao11/21/2024

Fontenvd

Avistamentos honeypot0

Produtos afetados

fedoraproject:fedoranextcloud:nextcloud_server

Fraquezas (CWE)

CWE-285CWE-552

Referencias

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48m7-7r2r-838r(security-advisories@github.com)

https://github.com/nextcloud/server/pull/27000(security-advisories@github.com)

https://hackerone.com/reports/1193321(security-advisories@github.com)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/(security-advisories@github.com)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/(security-advisories@github.com)

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

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48m7-7r2r-838r(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/nextcloud/server/pull/27000(af854a3a-2127-422b-91ae-364da2661108)

https://hackerone.com/reports/1193321(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/(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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