Prefix the 'echo' with a whitespace unless you want your password in the shell 
history. 

Else use dev/stdin al password file and press ^D to end the password.

If you dump the process memory the password will still be there. So if the 
environ is a problem, the process memory it is too. So bear in mind to trash 
the data where the password is after using it. 


On Saturday, June 16, 2012 at 4:44 PM, Calvin Morrison wrote:

> Ah how silly of me
> On Jun 16, 2012 8:06 AM, "Andrew Hills" <hills...@gmail.com 
> (mailto:hills...@gmail.com)> wrote:
> > On Fri, Jun 15, 2012 at 7:14 PM, Calvin Morrison <mutanttur...@gmail.com 
> > (mailto:mutanttur...@gmail.com)> wrote:
> > > On Jun 15, 2012 6:13 PM, "Kurt H Maier" <khm-suckl...@intma.in 
> > > (mailto:khm-suckl...@intma.in)> wrote:
> > >> On Fri, Jun 15, 2012 at 05:28:14PM -0400, Calvin Morrison wrote:
> > >> > Why not just pass the argument from a file?
> > >> >
> > >> > Exec --flag `cat password-file`
> > >> hahahah
> > > What is so funny?
> > 
> > Try this for me: take the attached file, argv.c, and drop it
> > somewhere; find it, run "make argv", and then do something like:
> > $ echo secretpassword > passwordfile
> > $ ./argv `cat passwordfile`
> > Look at the output. If you haven't caught on yet, run ps or top and
> > look at the process. Make sense now?
> > 
> > --Andrew Hills

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