CVE-2011-4367 PoC — Apache MyFaces Core ‘ln’ 参数目录遍历漏洞

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Apache's implementation of the JavaServer Faces (JSF) and Jakarta Faces specification

## Branches

### main

Jakarta Faces 5.0 implementation  

### 4.1.x
![4.1.x](https://img.shields.io/maven-central/v/org.apache.myfaces.core/myfaces-impl?versionPrefix=4.1&color=cyan)
Jakarta Faces 4.1 implementation  

### 4.0.x
![4.0.x](https://img.shields.io/maven-central/v/org.apache.myfaces.core/myfaces-impl?versionPrefix=4.0&color=cyan)
Jakarta Faces 4.0 implementation  
Based on the refactored 2.3-next codebase

### 2.3-next
![2.3-next](https://img.shields.io/maven-central/v/org.apache.myfaces.core/myfaces-impl?versionPrefix=2.3-next&color=cyan)
(Almost) JavaServer Faces 2.3 implementation  
Completely refactored codebase compared to 2.3, also providing a Quarkus extension  
2.3-next equals the JSF 2.3 API but delegates @ManagedBeans to CDI; ManagedBeans configured via XML are completely ignored. The implementation of the old FacesEL (javax.faces.el.*) also has been completely removed.

### 2.3.x
![2.3](https://img.shields.io/maven-central/v/org.apache.myfaces.core/myfaces-impl?versionPrefix=2.3&color=cyan)
JavaServer Faces 2.3 implementation


## Minimum Requirements (main)

- Java 17+
- Servlet 5.0+
- EL 5.0+
- CDI 4.0+
- JSTL 3.0+ (optional)
- BV 3.0+ (optional)

## Installation

mvn clean install

## Usage

### Dependency
```xml
<dependency>
    <groupId>org.apache.myfaces.core</groupId>
    <artifactId>myfaces-api</artifactId>
    <version>5.0.0-SNAPSHOT</version>
</dependency>
<dependency>
    <groupId>org.apache.myfaces.core</groupId>
    <artifactId>myfaces-impl</artifactId>
    <version>5.0.0-SNAPSHOT</version>
</dependency>
```

### web.xml
```xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="https://jakarta.ee/xml/ns/jakartaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/web-app_5_0.xsd"
         version="5.0">

    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>jakarta.faces.webapp.FacesServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.xhtml</url-pattern>
    </servlet-mapping>

</web-app>
```

### index.xhtml
```xml
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
  xmlns:f="jakarta.faces.core"
  xmlns:h="jakarta.faces.html">

  <h:head>

  </h:head>

  <h:body>

    Hello World!

  </h:body>
</html>
```

## Quarkus extension

Since 2.3-next a Quarkus extension is available. A sample project can be found here: https://github.com/apache/myfaces/blob/main/extensions/quarkus/showcase/

### Not supported features:
- Quarkus does not support session replication / passivation / clustering
- Quarkus beans are not serializable and therefore session passivation would never work anyway
- Quarkus does not implement `@ConversationScoped`
- Quarkus does not support injection in normal objects, therefore injection in JSF artifacts like NavigationHandler etc. is not supported

### Differences to a normal servlet container while developing
- You need to put your views under `src/main/resources/META-INF/resources` as Quarkus doesn't create a WAR and src/main/webapp is ignored!

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