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There are several blogs in the Internet which **highlight the dangers of leaving printers configured with LDAP with default/weak** logon credentials.\
This is because an attacker could **trick the printer to authenticate against a rouge LDAP server** (typically a `nc -vv -l -p 444` is enough) and to capture the printer **credentials on clear-text**.
Also, several printers will contains **logs with usernames** or could even be able to **download all usernames** from the Domain Controller.
All this **sensitive information** and the common **lack of security** makes printers very interesting for attackers.
Some blogs about the topic:
* [https://www.ceos3c.com/hacking/obtaining-domain-credentials-printer-netcat/](https://www.ceos3c.com/hacking/obtaining-domain-credentials-printer-netcat/)
* [https://medium.com/@nickvangilder/exploiting-multifunction-printers-during-a-penetration-test-engagement-28d3840d8856](https://medium.com/@nickvangilder/exploiting-multifunction-printers-during-a-penetration-test-engagement-28d3840d8856)
## Printer Configuration
- **Location**: The LDAP server list is found at: `Network > LDAP Setting > Setting Up LDAP`.
- **Behavior**: The interface allows LDAP server modifications without re-entering credentials, aiming for user convenience but posing security risks.
- **Exploit**: The exploit involves redirecting the LDAP server address to a controlled machine and leveraging the "Test Connection" feature to capture credentials.
## Capturing Credentials
**For more detailed steps, refer to the original [source](https://grimhacker.com/2018/03/09/just-a-printer/).**
### Method 1: Netcat Listener
A simple netcat listener might suffice:
```bash
sudo nc -k -v -l -p 386
```
However, this method's success varies.
### Method 2: Full LDAP Server with Slapd
A more reliable approach involves setting up a full LDAP server because the printer performs a null bind followed by a query before attempting credential binding.
1. **LDAP Server Setup**: The guide follows steps from [this source](https://www.server-world.info/en/note?os=Fedora_26&p=openldap).
2. **Key Steps**:
- Install OpenLDAP.
- Configure admin password.
- Import basic schemas.
- Set domain name on LDAP DB.
- Configure LDAP TLS.
3. **LDAP Service Execution**: Once set up, the LDAP service can be run using:
```bash
slapd -d 2
```
## References
* [https://grimhacker.com/2018/03/09/just-a-printer/](https://grimhacker.com/2018/03/09/just-a-printer/)
Learn AWS hacking from zero to hero with htARTE (HackTricks AWS Red Team Expert)!
Other ways to support HackTricks:
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* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
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