CVEs-PoC/2016/CVE-2016-9462.md

### [CVE-2016-9462](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9462)
![](https://img.shields.io/static/v1?label=Product&message=Nextcloud%20Server%20%26%20ownCloud%20Server%20Nextcloud%20Server%20before%209.0.52%20%26%20ownCloud%20Server%20before%209.0.4&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=Nextcloud%20Server%20%26%20ownCloud%20Server%20Nextcloud%20Server%20before%209.0.52%20%26%20ownCloud%20Server%20before%209.0.4%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Permission%20Issues%20(CWE-275)&color=brightgreen)

### Description

Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying restore privileges when restoring a file. The restore capability of Nextcloud/ownCloud was not verifying whether a user has only read-only access to a share. Thus a user with read-only access was able to restore old versions.

### POC

#### Reference
- https://github.com/owncloud/core/commit/c93eca49c32428ece03dd67042772d5fa62c8d6e
- https://github.com/owncloud/core/commit/d31720b6f1e8c8dfeb5e8805ab35ad7c8000b2f1
- https://hackerone.com/reports/146067

#### Github
No PoCs found on GitHub currently.