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pgadmin/CVE-2023-5002/README.zh-cn.md
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pgadmin/CVE-2023-5002/README.zh-cn.md
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# pgAdmin <= 7.6 后台远程命令执行漏洞(CVE-2023-5002)
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pgAdmin是一个著名的PostgreSQL数据库管理平台。
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pgAdmin包含一个HTTP API可以用来让用户选择并验证额外的PostgreSQL套件,比如pg_dump和pg_restore。在[CVE-2022-4223](https://github.com/vulhub/vulhub/tree/master/pgadmin/CVE-2022-4223)中,这个API可被用于执行任意命令,官方对此进行了修复,但在7.6版本及以前修复并不完全,导致后台用户仍然可以执行任意命令。
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参考链接:
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- <https://github.com/pgadmin-org/pgadmin4/commit/35f05e49b3632a0a674b9b36535a7fe2d93dd0c2>
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- <https://github.com/advisories/GHSA-ghp8-52vx-77j4>
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## 漏洞环境
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执行如下命令启动一个pgAdmin 7.6服务器:
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```
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docker compose up -d
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```
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服务器启动后,访问`http://your-ip:5050`即可查看到pgAdmin默认的登录页面。
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### 一些值得注意的事情
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CVE-2023-5002是一个针对[CVE-2022-4223](https://github.com/vulhub/vulhub/tree/master/pgadmin/CVE-2022-4223)漏洞的补丁绕过漏洞。官方发布了下面两个修复补丁修复漏洞:
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- 给`validate_binary_path`函数增加`@login_required`装饰器,限制未授权的用户访问相关接口
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- 使用`os.path.exists()`检查用户传入的路径是否有效
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不幸地是,只有第二个修复补丁可以被绕过,所以该漏洞仅是一个后台命令执行漏洞。
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## 漏洞复现
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使用帐号`vulhub@example.com`和密码`vulhub`登录pgAdmin。
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热爱后选择“Tools -> Storage Manager”打开文件管理器:
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创建一个新的目录,名字是我们的Payload `";id;#`:
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这个目录的完整路径是`/var/lib/pgadmin/storage/vulhub_example.com/";id;#`,我们后续就需要使用这个路径来利用漏洞。
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选择“File -> Preferences”打开设置页面,并来到“Paths -> Binary paths”面板。在任意一个“PostgreSQL Binary Path”文本框中填入`/var/lib/pgadmin/storage/vulhub_example.com/";id;#`,并点击右侧的“验证”按钮:
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可见,`id`命令被成功执行:
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