Em 29-04-2014 17:04, Andrew Lutomirski escreveu:
On Tue, Apr 29, 2014 at 12:48 PM, Reindl Harald <h.reindl@xxxxxxxxxxxxx> wrote:
Am 29.04.2014 21:36, schrieb Andrew Lutomirski:
On Tue, Apr 29, 2014 at 12:33 PM, Reindl Harald <h.reindl@xxxxxxxxxxxxx> wrote:
simple example:
* binary XYZ is vulerable for privilege escalation
This makes no sense...
for you
* we talk about a *local* exploit until now
...I don't even know what you're trying to say here...
than google for
* "privilege escalation"
* "local exploit"
* "remote exploit"
that could be a good start:
http://en.wikipedia.org/wiki/Exploit_%28computer_security%29
* a bad configured webserver allows system-commands through a php-script
and i consider that you google for the /e modifier
...and this is already sufficient for a remote exploit.
yes, but the difference may be if you only can run unprivileged
code or have a chance to own the machine and get root
Can you give an actual concrete example of wtf you're talking about?
Because I suspect that you're completely wrong, but maybe you're right
and no one on this thread understands what you're trying to say.
Feel free to say things like "suppose I have a php app that does XYZ"
and feel free to add supposedly vulnerable udev binaries, copies of
sh, copies of busybox, copies of python, gcc, etc, as needed for this
to make any sense.
In simple terms: when you go to sleep at night, do you leave your
toolbox right in front of your locked front door, ready for anyone to
use it on your door? I do hope not, and that's the point in here. Or
you're just too naive to believe that the street wall is just enough to
hide it and nothing else is needed.
"Ohh but you remove X while program Y can also be used!" Yes, it can!
But makes it harder, that's the point. Can bash open tcp sockets? Yes.
Bash can pass through proxies easily? No. But wget can. "Ohh but then
someone also needs the proxy information" Yes, and that's not the point
here. You already have 1 obstacle more.
You have to think out of the box here, we're brainstorming on why a
toolbox in your front door may or not be a liability. Security is way
much more than privilege escalation. You are not considering that
someone may be able to trigger an event and simply start a DoS, due to
systemd or whatever in question not being properly initialized. Exposing
this theoretical trigger here to you so you "understand it", right now,
it out of scope. I hope you understand that.
Marcelo
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