CVE-2021-32678

Ratelimit not applied on OCS API responses

State: Published
Severity: 3.7 Low
Published: Jul 12, 2021
Updated: Aug 3, 2024
Reserved: May 12, 2021

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.

Scores

CVSS	Score	Vector	Source
3.1	3.7 Low	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N	GitHub_M

Weaknesses

CWE-799 Improper Control of Interaction Frequency

Affected Products

Product	Versions
security-advisoriesnextcloud	< 19.0.13Affected >= 20.0.0, < 20.0.11Affected >= 21.0.0, < 21.0.3Affected

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48rx-3gmf-g74j
https://github.com/nextcloud/server/pull/27329
https://hackerone.com/reports/1214158
FEDORA-2021-9b421b78afvendor-advisory
FEDORA-2021-6f327296fevendor-advisory
GLSA-202208-17vendor-advisory

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