Class: Arachni::Checks::UnvalidatedRedirectDOM

Inherits:
Arachni::Check::Base show all
Defined in:
components/checks/active/unvalidated_redirect_dom.rb

Overview

Unvalidated redirect DOM check.

Constant Summary collapse

BASE_URL =
"www.#{Utilities.random_seed}.com"

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, NestedCookie, 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

.check_and_log(page, element) ⇒ Object


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# File 'components/checks/active/unvalidated_redirect_dom.rb', line 46

def self.check_and_log( page, element )
    return if !payload? page.url
    log vector: element, page: page
end

.infoObject


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# File 'components/checks/active/unvalidated_redirect_dom.rb', line 51

def self.info
    {
        name:        'Unvalidated DOM redirect',
        description: %q{
Injects URLs and checks the browser URL to determine whether the attack was successful.
},
        elements:    DOM_ELEMENTS_WITH_INPUTS - [
            Element::LinkTemplate::DOM,
            Element::UIInput::DOM
        ],
        author:      'Tasos "Zapotek" Laskos <[email protected]>',
        version:     '0.1.3',

        issue:       {
            name:            %q{Unvalidated DOM redirect},
            description:     %q{
Web applications occasionally use DOM input values to store the address of the
page to which the client will be redirected -- for example:
`yoursite.com/#/?redirect=www.yoursite.com/404.asp`

An unvalidated redirect occurs when the client is able to modify the affected
parameter value and thus control the location of the redirection.
For example, the following URL `yoursite.com/#/?redirect=www.anothersite.com`
will redirect to `www.anothersite.com`.

Cyber-criminals will abuse these vulnerabilities in social engineering attacks
to get users to unknowingly visit malicious web sites.

Arachni has discovered that the web page does not validate the parameter value prior
to redirecting the client to the injected value.
},
            references:  {
                'OWASP Top 10 2010' => 'https://www.owasp.org/index.php/Top_10_2010-A10-Unvalidated_Redirects_and_Forwards'
            },
            tags:            %w(unvalidated redirect dom injection),
            cwe:             819,
            severity:        Severity::HIGH,
            remedy_guidance: %q{
The application should ensure that the supplied value for a redirect is permitted.
This can be achieved by performing whitelisting on the parameter value.

The whitelist should contain a list of pages or sites that the application is
permitted to redirect users to. If the supplied value does not match any value
in the whitelist then the server should redirect to a standard error page.
}
        }
    }
end

.optionsObject


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# File 'components/checks/active/unvalidated_redirect_dom.rb', line 32

def self.options
    @options ||= {
        format:               [ Format::STRAIGHT ],
        parameter_names:      false,
        with_extra_parameter: false
    }
end

.payload?(url) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'components/checks/active/unvalidated_redirect_dom.rb', line 25

def self.payload?( url )
    (@set_payloads ||= Set.new( payloads )).include? Arachni::URI( url ).to_s
end

.payloadsObject


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# File 'components/checks/active/unvalidated_redirect_dom.rb', line 17

def self.payloads
    @payloads ||= [
        BASE_URL,
        "https://#{BASE_URL}",
        "http://#{BASE_URL}"
    ].map { |url| Arachni::URI( url ).to_s }
end

Instance Method Details

#payload?(url) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'components/checks/active/unvalidated_redirect_dom.rb', line 28

def payload?( url )
    self.class.payload? url
end

#runObject


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# File 'components/checks/active/unvalidated_redirect_dom.rb', line 40

def run
    each_candidate_dom_element do |element|
        element.audit( self.class.payloads, self.class.options )
    end
end