debian-mirror-gitlab/doc/user/application_security/dast/checks/548.1.md

---
stage: Secure
group: Dynamic Analysis
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
---

# Exposure of information through directory listing

## Description

The target web server is configured to list the contents of directories that do not contain an index file
such as `index.html`. This could lead to accidental exposure of sensitive information, or give an attacker
details on how filenames and directories are structured and stored.

## Remediation

Directory indexing should be disabled.

Apache:
For Apache based web sites, ensure all `<Directory>` definitions have `Options -Indexes` configured in the
`apache2.conf` or `httpd.conf` configuration file.

NGINX:
For NGINX based websites, ensure all `location` definitions have the `autoindex off` directive set in the
`nginx.conf` file.

IIS:
For IIS based websites version 7.0 and above you can use the `<directoryBrowse enabled="false" />` element
in the `applicationHost.config` or `Web.config` files.

For all other server types, please consult your product's documentation on how to disable directory
indexing.

## Details

| ID | Aggregated | CWE | Type | Risk |
|:---|:--------|:--------|:--------|:--------|
| 548.1 | false | 548 | Passive | Low |

## Links

- [CWE](https://cwe.mitre.org/data/definitions/548.html)
- [Apache Options](https://httpd.apache.org/docs/2.4/mod/core.html#options)
- [NGINX autoindex](https://nginx.org/en/docs/http/ngx_http_autoindex_module.html)
- [IIS directoryBrowse element](https://docs.microsoft.com/en-us/iis/configuration/system.webserver/directorybrowse)