CVE-2021-32678 Information

Description

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13 20.0.11 and 21.0.3 ratelimits are not applied to OCS API responses. This affects any OCS API controller (OCSController) using the @BruteForceProtection annotation. Risk depends on the installed applications on the Nextcloud Server but could range from bypassing authentication ratelimits or spamming other Nextcloud users. The vulnerability is patched in versions 19.0.13 20.0.11 and 21.0.3. No workarounds aside from upgrading are known to exist.

CVSS Vector

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

Reference

https://github.com/nextcloud/server/pull/27329 https://hackerone.com/reports/1214158 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48rx-3gmf-g74j https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

5.3