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#7672 - 11/27/02 09:31 PM help?  
Joined: Nov 2002
Posts: 1
sleepigrl Offline
Junior Member
sleepigrl  Offline
Junior Member

Joined: Nov 2002
Posts: 1
As part of a class project I need to write an exploit for the read below:

Code:
unsigned char data[200];
int i,j,n;
 
n=open(filename, O_RDONLY);
 
i=-1;
do{
i++;
j=read(n,data+i,1);
}while(j>0);
I have the binary code for NOP/open a shell/etc, but I can't figure out how to store it correctly in data since I have to read from a file - It ends up stored as ascii characters, having different values from what I need.

Any help would be appreciated.

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#7673 - 11/28/02 01:34 AM Re: help?  
Joined: May 2002
Posts: 189
CyberNerd Offline
Member
CyberNerd  Offline
Member

Joined: May 2002
Posts: 189
Here
isnt this what they would call cheating...
(i couldnt help you anyway)


Just because I dont care doesn't mean that I don't understand.
-Homer Simpson
#7674 - 11/28/02 03:22 PM Re: help?  
Joined: Mar 2002
Posts: 1,273
SilentRage Offline
DollarDNS Owner
SilentRage  Offline
DollarDNS Owner

Joined: Mar 2002
Posts: 1,273
OH, USA
Are you trying to get a buffer overflow with that? seems you're reading characters from a file one at a time into the data buffer. If you read over 200 bytes, then possibly the data in the file after 200 bytes could be shell code and somehow get it executed. But anyway, that seems awefully vague.


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