Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and starting in version 22.0.0 and prior to versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Enterprise Server, the DNS pin middleware was vulnerable to DNS rebinding allowing an attacker to perform SSRF as a final result. Nextcloud Server 25.0.11, 26.0.6, and 27.1.0 and Nextcloud Enterprise Server 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 contain patches for this issue. No known workarounds are available.
Weakness
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Nextcloud_server | Nextcloud | 22.0.0 (including) | 22.2.10.16 (excluding) |
| Nextcloud_server | Nextcloud | 23.0.0 (including) | 23.0.12.11 (excluding) |
| Nextcloud_server | Nextcloud | 24.0.0 (including) | 24.0.12.7 (excluding) |
| Nextcloud_server | Nextcloud | 25.0.0 (including) | 25.0.11 (excluding) |
| Nextcloud_server | Nextcloud | 26.0.0 (including) | 26.0.6 (excluding) |
| Nextcloud_server | Nextcloud | 27.0.0 (including) | 27.1.0 (excluding) |
Related Attack Patterns
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8f69-f9jg-4x3v
- https://github.com/nextcloud/server/pull/40234
- https://hackerone.com/reports/2115212
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8f69-f9jg-4x3v
- https://github.com/nextcloud/server/pull/40234
- https://hackerone.com/reports/2115212