Class: Arachni::Checks::InsecureCrossDomainPolicyHeaders

Inherits:
Arachni::Check::Base show all
Defined in:
components/checks/passive/insecure_cross_domain_policy_headers.rb

Overview

Author:

Version:

  • 0.1

Constant Summary collapse

INSECURE_WILDCARDS =
[
    '*',
    'http://*',
    'https://*'
]

Constants included from Arachni::Check::Auditor

Arachni::Check::Auditor::DOM_ELEMENTS_WITH_INPUTS, Arachni::Check::Auditor::ELEMENTS_WITH_INPUTS, Arachni::Check::Auditor::FILE_SIGNATURES, Arachni::Check::Auditor::FILE_SIGNATURES_PER_PLATFORM, Arachni::Check::Auditor::Format, Arachni::Check::Auditor::SOURCE_CODE_SIGNATURES_PER_PLATFORM

Constants included from Arachni

BANNER, Arachni::Cookie, Form, Header, JSON, Link, LinkTemplate, Severity, UIForm, UIInput, VERSION, WEBSITE, WIKI, XML

Instance Attribute Summary

Attributes included from Arachni::Check::Auditor

#framework, #page

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Arachni::Check::Base

#browser_cluster, #clean_up, elements, exempt_platforms, has_exempt_platforms?, has_platforms?, #initialize, platforms, #plugins, prefer, #preferred, preferred, #prepare, #session, supports_platforms?

Methods included from Arachni::Check::Auditor

#audit, #audit_differential, #audit_signature, #audit_timeout, #audited, #audited?, #buffered_audit, #each_candidate_dom_element, #each_candidate_element, has_timeout_candidates?, #http, #initialize, #log, #log_issue, #log_remote_file, #log_remote_file_if_exists, #match_and_log, #max_issues, #preferred, reset, #skip?, timeout_audit_run, #trace_taint, #with_browser, #with_browser_cluster

Methods inherited from Arachni::Component::Base

author, description, fullname, #shortname, shortname, shortname=, version

Methods included from Arachni::Component::Output

#depersonalize_output, #depersonalize_output?, #intercept_print_message

Methods included from UI::Output

#caller_location, #debug?, #debug_level, #debug_level_1?, #debug_level_2?, #debug_level_3?, #debug_level_4?, #debug_off, #debug_on, #disable_only_positives, #error_buffer, #error_log_fd, #error_logfile, #has_error_log?, #included, #log_error, #mute, #muted?, #only_positives, #only_positives?, #print_bad, #print_debug, #print_debug_backtrace, #print_debug_exception, #print_debug_level_1, #print_debug_level_2, #print_debug_level_3, #print_debug_level_4, #print_error, #print_error_backtrace, #print_exception, #print_info, #print_line, #print_ok, #print_status, #print_verbose, #reroute_to_file, #reroute_to_file?, reset_output_options, #set_error_logfile, #unmute, #verbose?, #verbose_off, #verbose_on

Methods included from Arachni::Component::Utilities

#read_file

Methods included from Utilities

#available_port, available_port_mutex, #bytes_to_kilobytes, #bytes_to_megabytes, #caller_name, #caller_path, #cookie_decode, #cookie_encode, #cookies_from_file, #cookies_from_parser, #cookies_from_response, #exception_jail, #exclude_path?, #follow_protocol?, #form_decode, #form_encode, #forms_from_parser, #forms_from_response, #full_and_absolute_url?, #generate_token, #get_path, #hms_to_seconds, #html_decode, #html_encode, #include_path?, #links_from_parser, #links_from_response, #normalize_url, #page_from_response, #page_from_url, #parse_set_cookie, #path_in_domain?, #path_too_deep?, #port_available?, #rand_port, #random_seed, #redundant_path?, #regexp_array_match, #remove_constants, #request_parse_body, #seconds_to_hms, #skip_page?, #skip_path?, #skip_resource?, #skip_response?, #to_absolute, #uri_decode, #uri_encode, #uri_parse, #uri_parse_query, #uri_parser, #uri_rewrite

Methods included from Arachni

URI, collect_young_objects, #get_long_win32_filename, jruby?, null_device, profile?, windows?

Constructor Details

This class inherits a constructor from Arachni::Check::Base

Class Method Details

.infoObject


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# File 'components/checks/passive/insecure_cross_domain_policy_headers.rb', line 47

def self.info
    {
        name:        'Insecure cross-domain policy (allow-http-request-headers-from)',
        description: %q{
Checks `crossdomain.xml` files for wildcard `allow-http-request-headers-from` policies.
},
        author:      'Tasos Laskos <[email protected]>',
        version:     '0.1',
        elements:    [ Element::Server ],

        issue:       {
            name:           %q{Insecure cross-domain policy (allow-http-request-headers-from)},
            description:    %q{
The browser security model normally prevents web content from one domain from
accessing data from another domain. This is commonly known as the "same origin policy".

URL policy files grant cross-domain permissions for reading data. They permit
operations that are not permitted by default. The URL policy file for Silverlight
is located, by default, in the root directory of the target server, with the name
`crossdomain.xml` (for example, at `www.example.com/crossdomain.xml`).

When a domain is specified in `crossdomain.xml`, the site declares that it
is willing to allow the operators of any servers in that domain to obtain any
document on the server where the policy file resides.

The `crossdomain.xml` file deployed on this website opens the server to all
domains (use of a single asterisk "*" as a pure wildcard is supported).
},
            references:      {
                'OWASP' => 'https://www.owasp.org/index.php/Test_Cross_Origin_Resource_Sharing_%28OTG-CLIENT-007%29',
                'Adobe' => 'http://blogs.adobe.com/stateofsecurity/2007/07/crossdomain_policy_files_1.html'
            },
            cwe:             16,
            severity:        Severity::LOW,
            remedy_guidance: %q{
Carefully evaluate which sites will be allowed to make cross-domain calls.

Consider network topology and any authentication mechanisms that will be affected
by the configuration or implementation of the cross-domain policy.
}
        }
    }
end

Instance Method Details

#check_and_log(response) ⇒ Object


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# File 'components/checks/passive/insecure_cross_domain_policy_headers.rb', line 27

def check_and_log( response )
    return if response.code != 200

    policy = Nokogiri::XML( response.body )
    return if !policy

    INSECURE_WILDCARDS.each do |wildcard|
        permissive_headers =
            policy.search( "allow-http-request-headers-from[domain='#{wildcard}']" )
        next if permissive_headers.empty?

        log(
            proof:    permissive_headers.to_xml,
            vector:   Element::Server.new( response.url ),
            response: response
        )
        return
    end
end

#runObject


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# File 'components/checks/passive/insecure_cross_domain_policy_headers.rb', line 19

def run
    url = "#{page.parsed_url.up_to_path}crossdomain.xml"
    return if audited?( url )
    audited( url )

    http.get( url, performer: self, &method(:check_and_log) )
end