Class: Arachni::Checks::LdapInjection

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

Overview

LDAP 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_stringsObject


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

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

.infoObject


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# File 'components/checks/active/ldap_injection.rb', line 30

def self.info
    {
        name:        'LDAPInjection',
        description: %q{
It tries to force the web application to return LDAP error messages, in order to
discover failures in user input validation.
},
        elements:    ELEMENTS_WITH_INPUTS,
        author:      'Tasos "Zapotek" Laskos <[email protected]>',
        version:     '0.1.4',

        issue:       {
            name:            %q{LDAP Injection},
            description:     %q{
Lightweight Directory Access Protocol (LDAP) is used by web applications to access
and maintain directory information services.

One of the most common uses for LDAP is to provide a Single-Sign-On (SSO) service
that will allow clients to authenticate with a web site without any interaction
(assuming their credentials have been validated by the SSO provider).

LDAP injection occurs when untrusted data is used by the web application to query
the LDAP directory without prior sanitisation.

This is a serious security risk, as it could allow cyber-criminals the ability
to query, modify, or remove anything from the LDAP tree. It could also allow other
advanced injection techniques that perform other more serious attacks.

Arachni was able to detect a page that is vulnerable to LDAP injection based on
known error messages.
},
            tags:            %w(ldap injection regexp),
            references:  {
                'WASC'  => 'http://projects.webappsec.org/w/page/13246947/LDAP-Injection',
                'OWASP' => 'https://www.owasp.org/index.php/LDAP_injection'
            },
            cwe:             90,
            severity:        Severity::HIGH,
            remedy_guidance: %q{
It is recommended that untrusted data is never used to form a LDAP query.

To validate data, the application should ensure that the supplied value contains
only the characters that are required to perform the required action. For example,
where a username is required, then no non-alphanumeric characters should be accepted.

If this is not possible, special characters should be escaped so they are treated
accordingly. The following characters should be escaped with a `\`:

* `&`
* `!`
* `|`
* `=`
* `<`
* `>`
* `,`
* `+`
* `-`
* `"`
* `'`
* `;`

Additional character filtering must be applied to:

* `(`
* `)`
* `\`
* `/`
* `*`
* `NULL`

These characters require ASCII escaping.
}
        }
    }
end

Instance Method Details

#runObject


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# File 'components/checks/active/ldap_injection.rb', line 22

def run
    # This string will hopefully force the webapp to output LDAP error messages.
    audit( '#^([email protected]$)(()))******',
        format:     [Format::APPEND],
        signatures: self.class.error_strings
    )
end