Vulnerability · Published Jul 12, 2021 · Assigned by GitHub_M
CVE-2021-32703Lack of ratelimit on shareinfo endpoint
Medium 5.3
In plain English
A medium-severity security flaw in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 75% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)1.5%top 25.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| nextcloud | security-advisories | < 19.0.13>= 20.0.0, < 20.0.11>= 21.0.0, < 21.0.3 |
Weakness: CWE-799 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-375p-cxxq-gc9p x_refsource_CONFIRM
- https://github.com/nextcloud/server/pull/26945 x_refsource_MISC
- https://hackerone.com/reports/1173684 x_refsource_MISC
- FEDORA-2021-9b421b78af vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-6f327296fe vendor-advisory, x_refsource_FEDORA
- GLSA-202208-17 vendor-advisory, x_refsource_GENTOO