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CVE-2021-32688

HIGH

8.8

Beschreibung

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.

CVE Details

CVSS v3.1 Bewertung8.8

SchweregradHIGH

CVSS VektorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AngriffsvektorNETWORK

KomplexitatLOW

Erforderliche PrivilegienLOW

BenutzerinteraktionNONE

Veroffentlicht7/12/2021

Zuletzt geandert11/21/2024

Quellenvd

Honeypot-Sichtungen0

Betroffene Produkte

fedoraproject:fedoranextcloud:nextcloud_server

Schwachen (CWE)

CWE-285CWE-552

Referenzen

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)

IOC Korrelationen

Keine Korrelationen erfasst

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