> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/fr/web-vulnerabilities/owasp-top-10-vulnerabilities/vulnerability-xml-external-entity-injection-xxe/xxe-user-enumeration-pentesting-web.md).

# Énumération d’utilisateurs via XXE

## XXE (injection d’entités externes XML) :

<figure><img src="/files/ca819beb0911b18519f65fc62739ef13e39dc1bc" alt=""><figcaption></figcaption></figure>

#### Analyse du code source (structure XML) interceptée avec Burp Suite

<figure><img src="/files/b9a79f5b6ded7da8f3aeb43b0dfa3c8ca21d49e1" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/215cadd512e35cc3bb55079957320f2cb37aeee1" alt=""><figcaption></figcaption></figure>

#### Tentative d’attaque XXE (injection d’entités externes XML)

* Modification de la méthode de la requête de GET vers POST.

<figure><img src="/files/7f9592de276873a7c72c001bca4c0f71fb65c8b9" alt=""><figcaption></figcaption></figure>

* Essai d’injection d’un modèle d’imprimante XXE dans la requête POST.

<pre class="language-xml"><code class="lang-xml">&#x3C;creds>
<strong>	&#x3C;customer>
</strong>		Jordan
	&#x3C;/customer>
	&#x3C;password>
		jordan123
	&#x3C;/password>
&#x3C;/creds>
</code></pre>

* Observation de la façon dont le serveur interprète le modèle d’imprimante XXE.

<figure><img src="/files/3744a8180bcf8be3688d64fed51b437e7f8ccceb" alt=""><figcaption></figcaption></figure>

* Pour accéder au système de fichiers, nous devons créer une nouvelle **entité**, par exemple, "myFile", comme suit : `<!DOCTYPE foo [<!ENTITY myFile SYSTEM "file:///etc/passwd">]>` Ensuite, dans une variable, nous devrions publier le résultat avec "**/\&myFile**" comme ceci :

<figure><img src="/files/e65610facd9fe0136ec18e5c2cb3ea47920813b9" alt=""><figcaption></figcaption></figure>

#### Identification d’un utilisateur "ftpUserULTRA

<figure><img src="/files/563addb0d1e3ed3c16bdeca3777012792b17fa3c" alt=""><figcaption></figcaption></figure>


---

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