Class: Arachni::Checks::HttpPut

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

Overview

HTTP PUT recon check.

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

.bodyObject


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# File 'components/checks/passive/http_put.rb', line 18

def self.body
    @body ||= 'Created by Arachni. ' + substring
end

.infoObject


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# File 'components/checks/passive/http_put.rb', line 49

def self.info
    {
        name:        'HTTP PUT',
        description: %q{Checks if uploading files is possible using the HTTP PUT method.},
        elements:    [ Element::Server ],
        author:      'Tasos "Zapotek" Laskos <[email protected]>',
        version:     '0.2.3',

        issue:       {
            name:            %q{Publicly writable directory},
            description:     %q{
There are various methods in which a file (or files) may be uploaded to a
webserver. One method that can be used is the HTTP `PUT` method. The `PUT`
method is mainly used during development of applications and allows developers to
upload (or put) files on the server within the web root.

By nature of the design, the `PUT` method typically does not provide any filtering
and therefore allows sever side executable code (PHP, ASP, etc) to be uploaded to
the server.

Cyber-criminals will search for servers supporting the `PUT` method with the
intention of modifying existing pages, or uploading web shells to take control
of the server.

Arachni has discovered that the affected path allows clients to use the `PUT`
method. During this test, Arachni has `PUT` a file on the server within the web
root and successfully performed a `GET` request to its location and verified the
contents.
},
            references: {
                'W3' => 'http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html'
            },
            tags:            %w(http methods put server),
            cwe:             650,
            severity:        Severity::HIGH,
            remedy_guidance: %q{
Where possible the HTTP `PUT` method should be globally disabled.
This can typically be done with a simple configuration change on the server.
The steps to disable the `PUT` method will differ depending on the type of server
being used (IIS, Apache, etc.).

For cases where the `PUT` method is required to meet application functionality,
such as REST style web services, strict limitations should be implemented to
ensure that only secure (SSL/TLS enabled) and authorised clients are permitted
to use the `PUT` method.

Additionally, the server's file system permissions should also enforce strict limitations.
}
        }
    }
end

.substringObject


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# File 'components/checks/passive/http_put.rb', line 14

def self.substring
    @substring ||= 'PUT' + random_seed
end

Instance Method Details

#check_and_log(response, put_response) ⇒ Object


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# File 'components/checks/passive/http_put.rb', line 39

def check_and_log( response, put_response )
    return if !response.body.to_s.include?( self.class.substring )

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

#runObject


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

def run
    path = "#{get_path( page.url )}Arachni-#{random_seed}"
    return if audited?( path )
    audited( path )

    http.request( path, method: :put, body: self.class.body ) do |res|
        next if res.code != 201

        http.get( path ) do |c_res|
            check_and_log( c_res, res )

            # Try to DELETE the PUT file.
            http.request( path, method: :delete ){}
        end
    end
end