Re: [SLUG] Screensaver trick - poor security

From: Derek Glidden (dglidden@illusionary.com)
Date: Mon Jun 04 2001 - 12:27:12 EDT


Smitty wrote:
>
> This only works if your security configuration is low. A user cannot
> connect to that server on my box. Anyone who can do that trick as a
> user should evaluate the consequences of their security set-up.
> Smitty

No - it's not that you would do this to someone else's machine, but on
your own from an xterm or similar.

It's cool to have the matrix screen saver as your background "image."
:)

> > P.S.
> > Thank you, Derek, for teaching me that cool screensaver/backgroud trick.

And Ian. I think he was the one doing this on his laptops that got the
whole conversation started.

> > For any of you that weren't there, open up a console window and type the
> > following:
> >
> > <path-to-screensaver> -root
> >
> > Ex: /opt/kde2/bin/kmatrix.kss -root
> > Ex: xmatrix -root *if it resides in /usr/bin

-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
#!/usr/bin/perl -w
$_='while(read+STDIN,$_,2048){$a=29;$b=73;$c=142;$t=255;@t=map
{$_%16or$t^=$c^=($m=(11,10,116,100,11,122,20,100)[$_/16%8])&110;
$t^=(72,@z=(64,72,$a^=12*($_%16-2?0:$m&17)),$b^=$_%64?12:0,@z)
[$_%8]}(16..271);if((@a=unx"C*",$_)[20]&48){$h=5;$_=unxb24,join
"",@b=map{xB8,unxb8,chr($_^$a[--$h+84])}@ARGV;s/...$/1$&/;$d=
unxV,xb25,$_;$e=256|(ord$b[4])<<9|ord$b[3];$d=$d>>8^($f=$t&($d
>>12^$d>>4^$d^$d/8))<<17,$e=$e>>8^($t&($g=($q=$e>>14&7^$e)^$q*
8^$q<<6))<<9,$_=$t[$_]^(($h>>=8)+=$f+(~$g&$t))for@a[128..$#a]}
print+x"C*",@a}';s/x/pack+/g;eval 

usage: qrpff 153 2 8 105 225 < /mnt/dvd/VOB_FILENAME \ | extract_mpeg2 | mpeg2dec -

http://www.eff.org/ http://www.opendvd.org/ http://www.cs.cmu.edu/~dst/DeCSS/Gallery/



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