In dbus-proxy/flatpak-proxy.c in Flatpak before 0.8.9, and 0.9.x and 0.10.x before 0.10.3, crafted D-Bus messages to the host can be used to break out of the sandbox, because whitespace handling in the proxy is not identical to whitespace handling in the daemon.
| Software | From | Fixed in |
|---|---|---|
| flatpak / flatpak | - | 0.8.9 |
| flatpak / flatpak | 0.9.1 | 0.9.99.x |
| flatpak / flatpak | 0.10.0 | 0.10.3 |
| redhat / enterprise_linux_desktop | 7.0 | 7.0.x |
| redhat / enterprise_linux_workstation | 7.0 | 7.0.x |
| redhat / enterprise_linux_server | 7.0 | 7.0.x |
| redhat / enterprise_linux_server_eus | 7.5 | 7.5.x |
| redhat / enterprise_linux_server_tus | 7.6 | 7.6.x |
| redhat / enterprise_linux_server_eus | 7.6 | 7.6.x |
| redhat / enterprise_linux_server_aus | 7.6 | 7.6.x |