directory-listing: Directory Listing Enabled

id: directory-listing

info:
  name: Directory Listing Enabled
  author: theMiddle
  severity: low
  description: Directory Indexing is a web server feature that allows the contents of a directory to be displayed when no index file is present. This can be a security risk as it can expose sensitive files, old backup or unreferenced files.
  impact: |
    Sensitive files and directories may be exposed to unauthorized users.
  remediation: |
    Disable directory listing in the web server configuration.
  reference:
    - https://owasp.org/www-project-web-security-testing-guide/v42/4-Web_Application_Security_Testing/02-Configuration_and_Deployment_Management_Testing/04-Review_Old_Backup_and_Unreferenced_Files_for_Sensitive_Information
    - https://portswigger.net/kb/issues/00600100_directory-listing
  metadata:
    max-request: 2
  tags: misc,generic,misconfig,fuzz,miscellaneous,vuln
flow: |
  function target_is_in_scope(url) {
    if (url.startsWith(template.http_1_host) || url.startsWith("/")) {
      return true;
    }
    return false;
  }

  http(1);

  if(template.links) {
    var path_checked = [];
    var paths = [];

    for(i=0; i<template.links.length; i++) {
      if (target_is_in_scope(template.links[i])) {

        var path = template.links[i].replace(template.http_1_host, "");
        var path_split = path.split("/");
        var path_to_check = "";

        for(p in path_split) {
          if (path_split[p] != "") {
            path_to_check += "/"+path_split[p];

            if (!path_checked.includes(path_to_check)) {
              path_checked.push(path_to_check);

              set("path_to_check", path_to_check);
              http(2);
            }
          }
        }

      }
    }
  }

http:
  - method: GET
    path:
      - "{{BaseURL}}"

    host-redirects: true
    max-redirects: 2
    matchers:
      - type: dsl
        internal: true
        dsl:
          - contains(header, "text/html")
          - status_code_1 == 200
        condition: and

    extractors:
      - type: xpath
        name: links
        part: body
        internal: true
        xpath:
          - "//*/@href|//*/@src"

  - method: GET
    path:
      - "{{BaseURL}}{{path_to_check}}"

    host-redirects: true
    max-redirects: 2

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "<title>Index of"
        case-insensitive: true

      - type: word
        part: header
        words:
          - "text/html"

      - type: status
        status:
          - 200
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