Headline
CVE-2021-43863: Build software better, together
The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. The Nextcloud Android app uses content providers to manage its data. Prior to version 3.18.1, the providers FileContentProvider and DiskLruImageCacheFileProvider have security issues (an SQL injection, and an insufficient permission control, respectively) that allow malicious apps in the same device to access Nextcloud’s data bypassing the permission control system. Users should upgrade to version 3.18.1 to receive a patch. There are no known workarounds aside from upgrading.
Note: Our advisories are available at https://github.com/nextcloud/security-advisories/security/advisories and we will copy the advisory there later.
Impact
The Nextcloud Android app uses content providers to manage its data. The providers FileContentProvider and DiskLruImageCacheFileProvider have security issues (an SQL injection, and an insufficient permission control, respectively) that allow malicious apps in the same device to access Nextcloud’s data bypassing the permission control system.
Patches
It is recommended that the Nextcloud Android App is upgraded to 3.18.1 or later.
Workarounds
None.
References
- HackerOne
- Pull Request
For more information
If you have any questions or comments about this advisory:
- Create a post in nextcloud/security-advisories
- Customers: Open a support ticket at support.nextcloud.com