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Author: Arnt Karlsen
To: dng
Subject: Re: [DNG] May I use Netaid source as an example of good code?
On Sun, 1 Aug 2021 12:41:58 +0200, aitor wrote in message

> Hi,
> On 1/8/21 1:39, aitor wrote:
> > I'm looking for a safer way to run the binary with suid permissions
> > using the shared memory of the system to send a signal.
> Time ago somebody said me: "you can do nothing from your binary that
> i can't do externally from another binary".
> So, am i wasting time?


> Today i've been testing the idea and it's working for me. I'd like to
> prepare an example and share with all of you to resolve
> vulnerabilities. The example consists of a window with a button (to
> run the suid binary) and another binary -the intruder- located in the
> same directory and trying to do the same by using the other party's
> PID pretending to be the window.

..you're being too damned naive: Why would the intruder not try to
e.g. use your PID?

> The result is a segmentation fault.

..which I would argue is good, unless you are trying to set up some
sort of honey trap.
For a public etc service, log what you need and restart that service.

> I insist on trying to find the safest approach to run the suid binary
> because this is important not only for simple-netaid, but also for
> hopman, which will require granted permissions for running the
> *eject* command or the like (among others?).
> Cheers,
> Aitor.

..that eject command Can be used with a CD player to push a
reset or power switch button. ;o)

..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
Scenarios always come in sets of three:
best case, worst case, and just in case.