Earlier quoted context omitted.
The stagefright bugs gave control over the media-player daemon of Android. This daemon is not running as root, it's even jailed with SELinux, but it has some interesting permissions like microphone-access. Despite the media hype you can't root your phone with the stagefright bugs and so it wouldn't qualify for the bounty.
> Despite the media hype you can't root your phone with the stagefright bugs and so it wouldn't qualify for the bounty. Alone? No. As part of a "chain" of exploits, which is what this bounty is calling for, in concert with a privilege escalation? Yes. That bug allowed for remote and silent (due to executing in a way which would allow it to suppress notifications of the incoming message) arbitrary code execution as a…
> Regardless, the question you were responding to was more about how most of the exploits people put together do not satisfy the "remote" and "silent" parts, as opposed to the "I got root" part; the latter is comparatively easy
FWIW, "throughout the whole chain" was part of the question.