Vulnerability Details : CVE-2021-32678
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.
Products affected by CVE-2021-32678
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
- cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
- cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-32678
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 26 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-32678
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N |
10.0
|
2.9
|
NIST | |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
3.9
|
1.4
|
NIST | |
|
3.7
|
LOW | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
2.2
|
1.4
|
GitHub, Inc. |
CWE ids for CVE-2021-32678
-
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.Assigned by: nvd@nist.gov (Secondary)
-
The product does not properly limit the number or frequency of interactions that it has with an actor, such as the number of incoming requests.Assigned by: security-advisories@github.com (Primary)
References for CVE-2021-32678
-
https://security.gentoo.org/glsa/202208-17
Nextcloud: Multiple Vulnerabilities (GLSA 202208-17) — Gentoo securityThird Party Advisory
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/
[SECURITY] Fedora 33 Update: nextcloud-19.0.13-1.fc33 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://github.com/nextcloud/server/pull/27329
Propagate throttling on OCS response by LukasReschke · Pull Request #27329 · nextcloud/server · GitHubPatch;Third Party Advisory
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https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48rx-3gmf-g74j
Ratelimit not applied on OCS API responses · Advisory · nextcloud/security-advisories · GitHubThird Party Advisory
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https://hackerone.com/reports/1214158
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/
[SECURITY] Fedora 34 Update: nextcloud-20.0.11-1.fc34 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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