Class: Arachni::Checks::OriginSpoofAccessRestrictionBypass

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

Overview

Author:

Version:

  • 0.1

Constant Summary collapse

HEADERS =
[
    'X-Forwarded-For',
    'X-Originating-IP',
    'X-Remote-IP',
    'X-Remote-Addr'
]
ADDRESS =
'127.0.0.1'

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

.http_optionsObject


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# File 'components/checks/passive/origin_spoof_access_restriction_bypass.rb', line 22

def self.http_options
    @http_options ||= {
        headers: HEADERS.inject({}) { |h, header| h.merge( header => ADDRESS ) }
    }
end

.infoObject


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# File 'components/checks/passive/origin_spoof_access_restriction_bypass.rb', line 45

def self.info
    {
        name:        'Origin Spoof Access Restriction Bypass',
        description: %q{Retries denied requests with a spoofed origin header
            to trick the web application into thinking that the request originated
            from localhost and checks whether the restrictions was bypassed.},
        elements:    [ Element::Server ],
        author:      'Tasos "Zapotek" Laskos <[email protected]>',
        version:     '0.1',

        issue:       {
            name:        %q{Access restriction bypass via origin spoof},
            description: %q{
Origin headers are utilised by proxies and/or load balancers to track the
originating IP address of the client.

As the request progresses through a proxy, the origin header is added to the
existing headers, and the value of the client's IP is then set within this header.
Occasionally, poorly implemented access restrictions are based off of the
originating IP address alone.

For example, any public IP address may be forced to authenticate, while an
internal IP address may not.

Because this header can also be set by the client, it allows cyber-criminals to
spoof their IP address and potentially gain access to restricted pages.

Arachni discovered a resource that it did not have permission to access, but been
granted access after spoofing the address of localhost (127.0.0.1), thus bypassing
any requirement to authenticate.
},
            tags:        %w(access restriction server bypass),
            severity:    Severity::HIGH,
            remedy_guidance: %q{
Remediation actions may be vastly different depending on the framework being used,
and how the application has been coded. However, the origin header should never
be used to validate a client's access as it is trivial to change.
}
        }
    }
end

Instance Method Details

#check_and_log(response) ⇒ Object


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# File 'components/checks/passive/origin_spoof_access_restriction_bypass.rb', line 34

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

    log(
        vector:   Element::Server.new( response.url ),
        response: response,
        proof:    response.status_line
    )
    print_ok "Request was accepted: #{response.url}"
end

#runObject


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# File 'components/checks/passive/origin_spoof_access_restriction_bypass.rb', line 28

def run
    return if ![401, 403].include?( page.code )

    http.get( page.url, self.class.http_options, &method(:check_and_log) )
end