Module: Arachni::Module::Auditor

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# File 'lib/module/auditor.rb', line 198

def audit_forms( injection_str, id_regex = nil, id = nil, &block )
    
    results = []
    
    work_on_forms {
        |orig_form|
        form = get_form_simple( orig_form )

        next if !form
        
        url    = form['attrs']['action']
        method = form['attrs']['method']
            
        # iterate through each auditable element
        inject_each_var( form['auditable'], injection_str ).each {
            |input|

            audit_id = "#{self.class.info['Name']}:" +
                "#{url}:" +
                "#{Vulnerability::Element::FORM}:" + 
                "#{input['altered'].to_s}=#{input['hash'].to_s}"
            
            next if @@audited.include?( audit_id )
            
            # inform the user what we're auditing
            print_status( self.class.info['Name']  + 
                " is auditing:\tform input '" +
                input['altered'] + "' with action " + url )

            if( method != 'get' )
                res = @http.post( url, input['hash'] )
            else
                res = @http.get( url, input['hash'] )
            end
            
            @@audited << audit_id
            
            # make sure that we have a response before continuing
            if !res then next end
            
            # call the block, if there's one
            if block_given?
                block.call( url, res, input['altered'] )
                next
            end

            if !res.body then next end
        
            # get matches
            result = get_matches( Vulnerability::Element::FORM,
                input['altered'], res, injection_str, id_regex, id, url )
            
            # and append them to the results array
            results << result if result
        }
    }
    results
end

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# File 'lib/module/auditor.rb', line 54

def audit_headers( injection_str, id_regex = nil, id = nil, &block )

    results = []
    
    # iterate through header fields and audit each one
    inject_each_var( get_request_headers( true ), injection_str ).each {
        |vars|

        audit_id = "#{self.class.info['Name']}:" +
            "#{@page.url}:#{Vulnerability::Element::HEADER}:" +
            "#{vars['altered'].to_s}=#{vars['hash'].to_s}"
        
        next if @@audited.include?( audit_id )

        # tell the user what we're doing
        print_status( self.class.info['Name']  + 
            " is auditing:\theader field '" +
            vars['altered'] + "' of " + @page.url )
        
        # audit the url vars
        res = @http.header( @page.url, vars['hash'] )
        @@audited << audit_id

        # something might have gone bad,
        # make sure it doesn't ruin the rest of the show...
        if !res then next end
        
        # call the passed block
        if block_given?
            block.call( @page.url, res, vars['altered'] )
            next
        end
        
        if !res.body then next end
        
        # get matches
        result = get_matches( Vulnerability::Element::HEADER,
            vars['altered'], res, injection_str, id_regex, id, @page.url )
        
        # and append them to the results array
        results << result if result
    }

    results
end

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# File 'lib/module/auditor.rb', line 121

def audit_links( injection_str, id_regex = nil, id = nil, &block )

    results = []
    
    work_on_links {
        |link|
        
        url       = link['href']
        link_vars = link['vars']
            
        # if we don't have any auditable elements just return
        if !link_vars then next end

        # iterate through all url vars and audit each one
        inject_each_var( link_vars, injection_str ).each {
            |vars|

            audit_id = "#{self.class.info['Name']}:" +
                "#{url}:#{Vulnerability::Element::LINK}:" +
                "#{vars['altered'].to_s}=#{vars['hash'].to_s}"
            
            next if @@audited.include?( audit_id )

            # tell the user what we're doing
            print_status( self.class.info['Name']  + 
                " is auditing:\tlink var '" +
                vars['altered'] + "' of " + url )
            
            # audit the url vars
            res = @http.get( url, vars['hash'] )
            @@audited << audit_id
            
            # something might have gone bad,
            # make sure it doesn't ruin the rest of the show...
            if !res then next end
            
            # call the passed block
            if block_given?
                block.call( url, res, vars['altered'] )
                next
            end
            
            if !res.body then next end
            
            # get matches
            result = get_matches( Vulnerability::Element::LINK,
                vars['altered'], res, injection_str, id_regex, id, url )
            
            # and append them to the results array
            results << result if result
        }
    }    

    results
end

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# File 'lib/module/auditor.rb', line 327

def get_matches( where, var, res, injection_str, id_regex, id, url )
    
    # fairly obscure condition...pardon me...
    if ( id && res.body.scan( id_regex )[0] == id ) ||
       ( !id && res.body.scan( id_regex )[0].size > 0 )
    
        print_ok( self.class.info['Name'] + " in: #{where} var #{var}" +
        '::' + url )
        
        print_verbose( "Injected str:\t" + injection_str )    
        print_verbose( "ID str:\t\t" + id )
        print_verbose( "Matched regex:\t" + id_regex.to_s )
        print_verbose( '---------' ) if only_positives?

        return {
            'var'          => var,
            'url'          => url,
            'injected'     => injection_str,
            'id'           => id,
            'regexp'       => id_regex.to_s,
            'regexp_match' => res.body.scan( id_regex ),
            'response'     => res.body,
            'elem'         => where,
            'headers'      => {
                'request'    => get_request_headers( ),
                'response'   => get_response_headers( res ),    
            }
        }
    end
end

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# File 'lib/module/auditor.rb', line 367

def inject_each_var( hash, to_inj )
    
    var_combo = []
    if( !hash || hash.size == 0 ) then return [] end
    
    # this is the original hash, in case the default values
    # are valid and present us with new attack vectors
    as_is = Hash.new( )
    as_is['altered'] = '__orig'
    chash = as_is['hash']    = hash.clone
        
    as_is['hash'].keys.each {
        |k|
        if( !as_is['hash'][k] ) then as_is['hash'][k] = '' end
    }
    var_combo << as_is
    
    # these are audit inputs, if a value is empty or null
    # we put a sample e-mail address in its place
    hash.keys.each {
        |k|
        
        hash = KeyFiller.fill( hash )
        
        var_combo << { 
            'altered' => k,
            'hash'    => hash.merge( { k => to_inj } )
        }
    }
    
    var_combo
end