---
title: "9100 - Printer"
weight: 9100
date: "2026-03-10T10:03:28+08:00"
lastmod: "2026-03-10T13:26:55+08:00"
---

💡 **学习提示**: 本文档介绍 **9100 - PJL Printer** 的渗透测试方法，适合信息安全初学者和从业人员参考。

⚠️ **法律声明**: 本文档仅供学习和授权测试使用。未经授权的系统测试可能违反法律法规。

---

> ⚠️ **法律声明**: 本文档仅供学习和授权测试使用。未经授权的系统测试可能违反法律法规。

## 9100/tcp - PJL (Printer Job Language)

### 基本信息

From [here](http://hacking-printers.net/wiki/index.php/Port_9100_printing): Raw printing is what we define as the process of making a connection to port 9100/tcp of a network printer. It is the default method used by CUPS and the Windows printing architecture to communicate with network printers as it is considered as ‘_the simplest, fastest, and generally the most reliable network protocol used for printers_’. Raw port 9100 printing, also referred to as JetDirect, AppSocket or PDL-datastream actually **is not a printing protocol by itself**. Instead **all data sent is directly processed by the printing device**, just like a parallel connection over TCP. In contrast to LPD, IPP and SMB, this can send direct feedback to the client, including status and error messages. Such a **bidirectional channel** gives us direct **access** to **results** of **PJL**, **PostScript** or **PCL** commands. Therefore raw port 9100 printing – which is supported by almost any network printer – is used as the channel for security analysis with PRET and PFT.

If you want to learn more about [**hacking printers read this page**](http://hacking-printers.net/wiki/index.php/Main_Page).

**默认 port:** 9100

```
9100/tcp open  jetdirect
```

### 信息收集

#### Manual

```bash
nc -vn <IP> 9100
@PJL INFO STATUS      #CODE=40000   DISPLAY="Sleep"   ONLINE=TRUE
@PJL INFO ID          # ID (Brand an version): Brother HL-L2360D series:84U-F75:Ver.b.26
@PJL INFO PRODINFO    #Product info
@PJL FSDIRLIST NAME="0:\" ENTRY=1 COUNT=65535  #List dir
@PJL INFO VARIABLES   #Env variales
@PJL INFO FILESYS     #?
@PJL INFO TIMEOUT     #Timeout variables
@PJL RDYMSG           #Ready message
@PJL FSINIT
@PJL FSDIRLIST
@PJL FSUPLOAD         #Useful to upload a file
@PJL FSDOWNLOAD       #Useful to download a file
@PJL FSDELETE         #Useful to delete a file
```

#### Automatic

```bash
nmap -sV --script pjl-ready-message -p <PORT> <IP>
```

```bash
msf> use auxiliary/scanner/printer/printer_env_vars
msf> use auxiliary/scanner/printer/printer_list_dir
msf> use auxiliary/scanner/printer/printer_list_volumes
msf> use auxiliary/scanner/printer/printer_ready_message
msf> use auxiliary/scanner/printer/printer_version_info
msf> use auxiliary/scanner/printer/printer_download_file
msf> use auxiliary/scanner/printer/printer_upload_file
msf> use auxiliary/scanner/printer/printer_delete_file
```

### Printers Hacking tool

This is the tool you want to use to abuse printers: [PRET](https://github.com/RUB-NDS/PRET)

### XPS/TrueType VM exploitation (Canon ImageCLASS)

- Deliver XPS over PJL:
  - `@PJL ENTER LANGUAGE = XPS`
  - Then send the XPS ZIP bytes on the same TCP connection.

- Minimal XPS page referencing an attacker font:

```xml
<Glyphs Fill="#ff000000" FontUri="/Resources/evil.ttf" FontRenderingEmSize="12" OriginX="10" OriginY="10"/>
```

- 远程代码执行 primitive summary (TrueType hinting VM):
  - Hinting bytecode in TTF is executed by a TrueType VM. Canon’s VM lacked stack bounds checks.
  - CINDEX: OOB stack read → info leak
  - DELTAP1: unchecked relative stack pivot → controlled writes with subsequent pushes
  - Combine `WS`/`RS` (VM storage write/read) to stage values and perform a precise 32-bit write after pivot.

- 利用 outline:
  1) Create XPS with the page above and include `/Resources/evil.ttf`.
  2) In `fpgm`/`prep`, use `CINDEX` to leak and compute `stack_cur`.
  3) Stage target value with `WS`; pivot with `DELTAP1` to the destination; use `RS` to write it (e.g., to a function pointer) to gain PC control.

- Send over 9100/tcp:

```bash
{ printf "@PJL ENTER LANGUAGE = XPS\r\n"; cat exploit.xps; } | nc -q0 <PRINTER_IP> 9100
```

- `exploit.xps` is a valid XPS ZIP containing `Documents/1/Pages/1.fpage` and `/Resources/evil.ttf`.

### **Shodan**

- `pjl port:9100`

---


### 搜索引擎语法

#### FOFA

```bash
# FOFA 搜索语法
port="9100"
```

#### Shodan

```bash
# Shodan 搜索语法
port:9100
```

#### ZoomEye

```bash
# ZoomEye 搜索语法
port:9100
```

---

## 📖 参考资料

- [HackTricks - 9100-printer](https://book.hacktricks.wiki/en/network-services-pentesting/9100-printer.html)