Class: Arachni::Modules::Recon::BackupFiles

Inherits:
Arachni::Module::Base show all
Includes:
Arachni::Module::Registrar, Arachni::UI::Output
Defined in:
modules/recon/backup_files.rb

Overview

Backup file discovery module.

Appends common backup extesions to the filename of the page under audit
and checks for its existence.

@author: Anastasios “Zapotek” Laskos 

                                     <tasos.laskos@gmail.com>
                                     <zapotek@segfault.gr>

@version: $Rev: 385 $

Class Method Summary (collapse)

Instance Method Summary (collapse)

Methods included from Arachni::Module::Registrar

#add_storage, #get_storage, #get_store, included, #register_results

Methods included from Arachni::UI::Output

#debug!, #debug?, #only_positives!, #only_positives?, #print_debug, #print_debug_backtrace, #print_debug_pp, #print_error, #print_info, #print_line, #print_ok, #print_status, #print_verbose, #verbose!, #verbose?

Methods inherited from Arachni::Module::Base

#clean_up, deps, #get_cookie_simple, #get_cookies, #get_cookies_simple, #get_data_file, #get_form_simple, #get_forms, #get_forms_simple, #get_links, #get_links_simple, #get_request_headers, #get_response_headers, #prepare

Methods included from Arachni::Module::Auditor

#audit_cookies, #audit_forms, #audit_headers, #audit_links, #get_matches, #inject_each_var

Methods included from Arachni::Module::Trainer

#train

Methods included from Arachni::Module::ElementDB

#init_cookies, #init_forms, #init_links, #update_cookies, #update_forms, #update_links, #work_on_cookies, #work_on_forms, #work_on_links

Constructor Details

- (BackupFiles) initialize(page)

A new instance of BackupFiles 



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# File 'modules/recon/backup_files.rb', line 38

def initialize( page )
    super( page )

    @__backup_ext = [
        '%s.old',
        '%s.OLD',
        '%s.bak',
        '%s.BAK',
        '%s.zip',
        '%s.ZIP',
        '%s.gz',
        '%s.tar.gz',
        '%s.temp',
        '%s.save',
        '%s.orig',
        '%s.backup',
        '%s.000',
        '%s~',
        '%s~1',
        '%s.cs',
        '%s.pas',
        '%s.vb',
        '%s.java',
        '%s.class',
        '%s.sav',
        '%s.saved',
        '%s.rar',
        '%s.src',
        '%s.tmp',
        '%s.inc',
        '%s.copy',
        '%s1',
        'Copy%%20of%%20%s'
    ]
    
    # our results hash
    @results = []
end

Class Method Details

+ (Object) info 



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# File 'modules/recon/backup_files.rb', line 121

def self.info
    {
        'Name'           => 'BackupFiles',
        'Description'    => %q{Tries to find sensitive backup files.},
        'Elements'       => [ ],
        'Author'         => 'zapotek',
        'Version'        => '$Rev: 385 $',
        'References'     => {},
        'Targets'        => { 'Generic' => 'all' },
            
        'Vulnerability'   => {
            'Name'        => %q{A backup file exists on the server.},
            'Description' => %q{},
            'CWE'         => '530',
            'Severity'    => Vulnerability::Severity::HIGH,
            'CVSSV2'       => '',
            'Remedy_Guidance'    => '',
            'Remedy_Code' => '',
        }

    }
end

Instance Method Details

- (Object) __get_path(url) 



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# File 'modules/recon/backup_files.rb', line 144

def __get_path( url )
  
    splits = []
    tmp = ''
    
    url.each_char {
        |c|
        if( c != '/' )
            tmp += c
        else
            splits << tmp
            tmp = ''
        end
    }
    
    if( !tmp =~ /\./ )
      splits << tmp
    end
    
    return splits.join( "/" ) + '/'
end

- (Object) __log_results(res, filename, url) 



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# File 'modules/recon/backup_files.rb', line 166

def __log_results( res, filename, url )
    
    # append the result to the results hash
    @results << Vulnerability.new( {
        'var'          => 'n/a',
        'url'          => url,
        'injected'     => filename,
        'id'           => filename,
        'regexp'       => 'n/a',
        'regexp_match' => 'n/a',
        'elem'         => Vulnerability::Element::LINK,
        'response'     => res.body,
        'headers'      => {
            'request'    => 'n/a',
            'response'   => 'n/a',    
        }
    }.merge( self.class.info ) )
            
    # inform the user that we have a match
    print_ok( self.class.info['Name'] +
        " named #{filename} at\t" + url )
end

- (Object) run 



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# File 'modules/recon/backup_files.rb', line 77

def run( )

    # ugly crap but it works, as far as I can tell...
    path     = __get_path( @page.url )
    regex    = path + '(.*)'
    
    filename = @page.url.match( Regexp.new( regex ) )
    filename = filename[1].gsub( /\?(.*)/, '' ) 
    
    if( filename.empty? )
        print_debug( self.class.info['Name'] + ' is backing out. ' + 
          'Can\'t extract filename from url: ' + @page.url )
        return
    end
    
    @__backup_ext.each {
        |ext|
        
        #
        # Test for the existance of the file + extension.
        #
        # We're not worrying about its contents, the Trainer will
        # analyze it and if it's HTML it'll extract any new attack vectors.
        #
        
        file = ext % filename # Example: index.php.bak
        url  = path + file
        res  = @http.get( url )

        __log_results( res, file, url ) if( res.code == "200" )
        
        file = ext % filename.gsub( /\.(.*)/, '' ) # Example: index.bak
        url  = path + file
        res  = @http.get( url )
        
        __log_results( res, file, url ) if( res.code == "200" )
    }

    
    # register our results with the system
    register_results( @results )
end