Class: Arachni::Checks::SqlInjection

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

Overview

SQL 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, 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

.error_signaturesObject


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# File 'components/checks/active/sql_injection.rb', line 20

def self.error_signatures
    return @error_signatures if @error_signatures

    @error_signatures = {}

    Dir[File.dirname( __FILE__ ) + '/sql_injection/substrings/*'].each do |file|
        @error_signatures[File.basename( file ).to_sym] =
            IO.read( file ).split( "\n" )
    end

    Dir[File.dirname( __FILE__ ) + '/sql_injection/regexps/*'].each do |file|
        platform = File.basename( file, '.yaml' ).to_sym

        @error_signatures[platform] ||= []

        YAML.load_file( file ).each do |substring, pattern|
            regexp = Regexp.new( pattern )

            @error_signatures[platform] << proc do |response|
                next if !response.body.include?( substring )
                regexp
            end
        end
    end

    @error_signatures
end

.ignore_signaturesObject


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# File 'components/checks/active/sql_injection.rb', line 48

def self.ignore_signatures
    @ignore_signatures ||= read_file( 'ignore_substrings' )
end

.infoObject


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# File 'components/checks/active/sql_injection.rb', line 70

def self.info
    {
        name:        'SQL Injection',
        description: %q{
SQL injection check, uses known SQL DB errors to identify vulnerabilities.
},
        elements:    ELEMENTS_WITH_INPUTS,
        author:      'Tasos "Zapotek" Laskos <[email protected]>',
        version:     '0.2.3',
        platforms:   options[:signatures].keys,

        issue:       {
            name:            %q{SQL Injection},
            description:     %q{
Due to the requirement for dynamic content of today's web applications, many
rely on a database backend to store data that will be called upon and processed
by the web application (or other programs).
Web applications retrieve data from the database by using Structured Query Language
(SQL) queries.

To meet demands of many developers, database servers (such as MSSQL, MySQL,
Oracle etc.) have additional built-in functionality that can allow extensive
control of the database and interaction with the host operating system itself.

An SQL injection occurs when a value originating from the client's request is used
within a SQL query without prior sanitisation. This could allow cyber-criminals
to execute arbitrary SQL code and steal data or use the additional functionality
of the database server to take control of more server components.

The successful exploitation of a SQL injection can be devastating to an
organisation and is one of the most commonly exploited web application vulnerabilities.

This injection was detected as Arachni was able to cause the server to respond to
the request with a database related error.
},
            references:  {
                'UnixWiz'    => 'http://unixwiz.net/techtips/sql-injection.html',
                'Wikipedia'  => 'http://en.wikipedia.org/wiki/SQL_injection',
                'SecuriTeam' => 'http://www.securiteam.com/securityreviews/5DP0N1P76E.html',
                'OWASP'      => 'https://www.owasp.org/index.php/SQL_Injection',
                'WASC'       => 'http://projects.webappsec.org/w/page/13246963/SQL%20Injection',
                'W3 Schools' => 'http://www.w3schools.com/sql/sql_injection.asp'
            },
            tags:            %w(sql injection regexp database error),
            cwe:             89,
            severity:        Severity::HIGH,
            remedy_guidance: %q{
The only proven method to prevent against SQL injection attacks while still
maintaining full application functionality is to use parameterized queries
(also known as prepared statements).
When utilising this method of querying the database, any value supplied by the
client will be handled as a string value rather than part of the SQL query.

Additionally, when utilising parameterized queries, the database engine will
automatically check to make sure the string being used matches that of the column.
For example, the database engine will check that the user supplied input is an
integer if the database column is configured to contain integers.
}
        }
    }
end

.optionsObject


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# File 'components/checks/active/sql_injection.rb', line 58

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

.payloadsObject

Prepares the payloads that will hopefully cause the webapp to output SQL error messages if included as part of an SQL query.


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# File 'components/checks/active/sql_injection.rb', line 54

def self.payloads
    @payloads ||= [ '"\'`--', ')' ]
end

Instance Method Details

#runObject


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# File 'components/checks/active/sql_injection.rb', line 66

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