NativeKey continues handling key messages after widget is destroyed
- September 17, 2013
- Masayuki Nakano
- Firefox, SeaMonkey, Thunderbird
- Fixed in
- Firefox 24
- SeaMonkey 2.21
- Thunderbird 24
Mozilla developer Masayuki Nakano discovered that the
NativeKey widget continues handling key messages even when it is
destroyed by dispatched event listeners. This could result in some key events
being applied to other objects or plugins if the widget memory is reallocated to
them, leading to a non-exploitable crash.
In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts.