In Flatpak before 0.8.7, a third-party app repository could include malicious apps that contain files with inappropriate permissions, for example setuid or world-writable. The files are deployed with those permissions, which would let a local attacker run the setuid executable or write to the world-writable location. In the case of the "system helper" component, files deployed as part of the app are owned by root, so in the worst case they could be setuid root.
The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.
| Link | Tags |
|---|---|
| https://github.com/flatpak/flatpak/issues/845 | issue tracking third party advisory patch |
| https://bugs.debian.org/865413 | issue tracking third party advisory patch |
| http://www.securityfocus.com/bid/99346 | vdb entry third party advisory |
| http://www.debian.org/security/2017/dsa-3895 | third party advisory vendor advisory |