Vulnerability Development: Re: AlphaNumeric Exploitation Help

["KF (lists)" <kf_lists () digitalmunition com>]

ramatkal () hotmail com wrote:

> I am trying to exploit a vulnerable server which only allows
> alphanumeric characters....
>
> I have successfully taken control of EIP and now need to do a JUMP -600
> bytes.....
>
> The problem is, that 'eb' and 'e9' are not alphanumeric asci codes and 
> thus cannot be used to do the jumps in the payload....
> Anyone got any ideas/tricks/advice on how i can accomplish a JMP -600 bytes, or any type of jump for that matter, only 
> using alphanumeric chars?
>
> Thanks,
> RaMatkal
>
>
>
>  
Let me know if you figure it out... I need to do the same thing to 
finish up a widcomm exploit I am working on.
I was trying to use Skylined's alpha 2 to encode a 3 byte near jump.  I 
ran into some problems with the decoder. I happen to be limited to 185 
bytes in my particular case... you may have other limitations.
-KF