Vulnerability Details : CVE-2021-32703
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the shareinfo endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.
Products affected by CVE-2021-32703
- 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-2021-32703
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 54 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-32703
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
3.9
|
1.4
|
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
|
GitHub, Inc. |
CWE ids for CVE-2021-32703
-
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-2021-32703
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https://hackerone.com/reports/1173684
Sign inPermissions Required
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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
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https://github.com/nextcloud/server/pull/26945
Add bruteforce protection to the shareinfo endpoint by rullzer · Pull Request #26945 · nextcloud/server · GitHubPatch;Third Party Advisory
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https://github.com/nextcloud/security-advisories/security/advisories/GHSA-375p-cxxq-gc9p
Lack of ratelimit on shareinfo endpoint · Advisory · nextcloud/security-advisories · GitHubThird Party Advisory
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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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