Class: Arachni::Checks::LocalstartAsp

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

Overview

Author:

Constant Summary

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/localstart_asp.rb', line 41

def self.info
    {
        name:        'localstart.asp',
        description: %q{Checks for localstart.asp.},
        elements:    [ Element::Server ],
        author:      'Tasos "Zapotek" Laskos <[email protected]>',
        version:     '0.1.3',

        issue:       {
            name:            %q{Exposed localstart.asp page},
            description:     %q{
To restrict access to specific pages on a webserver, developers can implement
various methods of authentication, therefore only allowing access to clients
with valid credentials.
There are several forms of authentication that can be used. The simplest forms of
authentication are known as 'Basic' and 'Basic Realm'.
These methods of authentication have several known weaknesses such as being
susceptible to brute force attacks.

Additionally, when utilising the NTLM mechanism in a windows environment, several
disclosures of information exist, and any brute force attack occurs against the
server's local users, or domain users if the web server is a domain member.

Cyber-criminals will attempt to locate protected pages to gain access to them
and also perform brute force attacks to discover valid credentials.

Arachni discovered the following page requires NTLM based basic authentication
in order to be accessed.
},
            tags:            %w(asp iis server),
            severity:        Severity::LOW,
            remedy_guidance: %q{
If the pages being protected are not required for the functionality of the web
application they should be removed, otherwise, it is recommended that basic
and basic realm authentication are not used to protect against pages requiring
authentication.

If NTLM based basic authentication must be used, then default server and domain
accounts such as `administrator` and `root` should be disabled, as these will
undoubtedly be the first accounts to be targeted in any such attack.

Additionally, the webserver should not be joined to any corporate domain where
usernames are readily available (such as from email addresses). If the pages are
required, and it is possible to remove the basic authentication, then a stronger
and more resilient form-based authentication mechanism should be implemented to
protect the affected pages.
}
        }
    }
end

Instance Method Details

#check_and_log(response) ⇒ Object


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# File 'components/checks/passive/localstart_asp.rb', line 31

def check_and_log( response )
    return if response.code != 401

    log(
        vector:   Element::Server.new( response.url ),
        response: response,
        proof:    response.status_line
    )
end

#runObject


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# File 'components/checks/passive/localstart_asp.rb', line 12

def run
    return if page.platforms.languages.any? && !page.platforms.languages.include?( :asp )

    path = get_path( page.url )
    return if audited?( path )
    audited path

    http.get( "#{path}/#{random_seed}" ) do |response|
        # If it needs auth by default then don't bother checking because
        # we'll get an FP.
        next if response.code == 401

        url = "#{path}/localstart.asp"

        print_status "Checking: #{url}"
        http.get( url, &method( :check_and_log ) )
    end
end