CVE-2023-28833
30.03.2023, 19:15
Nextcloud server is an open source home cloud implementation. In affected versions admins of a server were able to upload a logo or a favicon and to provided a file name which was not restricted and could overwrite files in the appdata directory. Administrators may have access to overwrite these files by other means but this method could be exploited by tricking an admin into uploading a maliciously named file. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. Users unable to upgrade should avoid ingesting logo files from untrusted sources.
| Vendor | Product | Version |
|---|---|---|
| nextcloud | nextcloud_server | 23.0.0 ≤ 𝑥 < 23.0.14 |
| nextcloud | nextcloud_server | 24.0.0 ≤ 𝑥 < 24.0.10 |
| nextcloud | nextcloud_server | 24.0.0 ≤ 𝑥 < 24.0.10 |
| nextcloud | nextcloud_server | 25.0.0 ≤ 𝑥 < 25.0.4 |
| nextcloud | nextcloud_server | 25.0.0 ≤ 𝑥 < 25.0.4 |
𝑥
= Vulnerable software versions
Common Weakness Enumeration
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
- CWE-434 - Unrestricted Upload of File with Dangerous TypeThe software allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment.