Vulnerability · Published Aug 10, 2023 · Assigned by GitHub_M
CVE-2023-39962Users can delete external storage mount points
High 7.7
In plain English
A high-severity improper access control in security-advisories from nextcloud. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities).
Official description
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 19.0.0 and prior to versions 19.0.13.10, 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1, a malicious user could delete any personal or global external storage, making them inaccessible for everyone else as well. Nextcloud server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 19.0.13.10, 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. As a workaround, disable app files_external. This also makes the external storage inaccessible but retains the configurations until a patched version has been deployed.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| nextcloud | security-advisories | >= 19.0.0, < 19.0.13.10>= 20.0.0, < 20.0.14.15>= 21.0.0, < 21.0.9.13>= 22.0.0, < 22.2.10.14>= 23.0.0, < 23.0.12.9>= 24.0.0, < 24.0.12.5>= 25.0.0, < 25.0.9>= 26.0.0, < 26.0.4 |
Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xwxx-2752-w3xm x_refsource_CONFIRM
- https://github.com/nextcloud/server/pull/39323 x_refsource_MISC
- https://hackerone.com/reports/2047168 x_refsource_MISC