Class: Arachni::Checks::XpathInjection

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

Overview

XPath Injection check.

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

.error_stringsObject


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# File 'components/checks/active/xpath_injection.rb', line 18

def self.error_strings
    @error_strings ||= read_file( 'errors.txt' )
end

.infoObject


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# File 'components/checks/active/xpath_injection.rb', line 35

def self.info
    {
        name:        'XPath Injection',
        description: %q{XPath injection check},
        elements:    ELEMENTS_WITH_INPUTS,
        author:      'Tasos "Zapotek" Laskos <[email protected]>',
        version:     '0.1.6',

        issue:       {
            name:            %q{XPath Injection},
            description:     %q{
XML Path Language (XPath) queries are used by web applications for selecting
nodes from XML documents.
Once selected, the value of these nodes can then be used by the application.

A simple example for the use of XML documents is to store user information. As
part of the authentication process, the application will perform an XPath query
to confirm the login credentials and retrieve that user's information to use in
the following request.

XPath injection occurs where untrusted data is used to build XPath queries.

Cyber-criminals may abuse this injection vulnerability to bypass authentication,
query other user's information, or, if the XML document contains privileged user
credentials, allow the cyber-criminal to escalate their privileges.

Arachni injected special XPath query characters into the page and based on the
responses from the server, has determined that the page is vulnerable to XPath injection.
},
            references:  {
                'OWASP' => 'https://www.owasp.org/index.php/XPATH_Injection',
                'WASC' => 'http://projects.webappsec.org/w/page/13247005/XPath%20Injection'
            },
            tags:            %w(xpath database error injection regexp),
            cwe:             91,
            severity:        Severity::HIGH,
            remedy_guidance: %q{
The preferred way to protect against XPath injection is to utilise parameterized
(also known as prepared) XPath queries.
When utilising this method of querying the XML document any value supplied by the
client will be handled as a string rather than part of the XPath query.

An alternative to parameterized queries it to use precompiled XPath queries.
Precompiled XPath queries are not generated dynamically and will therefor never
process user supplied input as XPath.
}
        }
    }
end

.optionsObject


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# File 'components/checks/active/xpath_injection.rb', line 27

def self.options
    @options ||= { format: [Format::APPEND], signatures: error_strings }
end

.payloadsObject

These will hopefully cause the webapp to output XPath error messages.


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# File 'components/checks/active/xpath_injection.rb', line 23

def self.payloads
    @payloads ||= %w('" ]]]]]]]]] <!--)
end

Instance Method Details

#runObject


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# File 'components/checks/active/xpath_injection.rb', line 31

def run
    audit self.class.payloads, self.class.options
end