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CVE-2021-41773 PoC — Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49

Source
Associated Vulnerability
Title:Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49 (CVE-2021-41773)
Description:A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.
Description
CVE-2021-41773 
Readme
# Apache HTTP Server 2.4.49 - Path Traversal & Remote Code Execution (RCE) Exploit (Fixed Version)

## Descripción

Este es un exploit para la vulnerabilidad de Apache HTTP Server 2.4.49 identificada como **CVE-2021-41773**. La versión original del exploit publicada en [Exploit-DB](https://www.exploit-db.com/exploits/50383) contenía errores de sintaxis y ejecución, por lo que esta versión ha sido corregida para garantizar su correcto funcionamiento en entornos Linux.

## Correcciones realizadas
- Se corrigió la sintaxis incorrecta en la estructura `if`.
- Se corrigió el bucle `for` para asegurar su correcta ejecución.
- Se agregó validación adecuada de los argumentos.
- Se mejoró la legibilidad y el manejo de errores.
- Se incluyó una verificación de permisos y ejecución.

## Uso

```bash
chmod +x PoC.sh
./50383.sh targets.txt /etc/passwd
```

### Ejemplo de Uso
#### Archivo `targets.txt` (lista de objetivos):
```
http://192.168.1.100
http://vulnerable-site.com
```

#### Ejecución del exploit para leer `/etc/passwd`:
```bash
./50383.sh targets.txt /etc/passwd
```

#### Ejecución del exploit para ejecutar un comando en el sistema objetivo:
```bash
./50383.sh targets.txt /bin/sh whoami
```


File Snapshot

[4.0K] /data/pocs/5cbdeeed5553a786a7f0e2da18c0acdddc0c4b07 ├── [ 370] 50383.sh └── [1.2K] README.md 0 directories, 2 files
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