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20 lines
793 B
Markdown
20 lines
793 B
Markdown
# TaintedUnserialize
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Tainted input detected to an `unserialize` call.
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Passing untrusted user input to `unserialize` calls is dangerous – from the [PHP documentation on unserialize](https://www.php.net/manual/en/function.unserialize.php):
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> Do not pass untrusted user input to unserialize() regardless of the options value of allowed_classes. Unserialization can result in code being loaded and executed due to object instantiation and autoloading, and a malicious user may be able to exploit this. Use a safe, standard data interchange format such as JSON (via json_decode() and json_encode()) if you need to pass serialized data to the user.
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```php
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<?php
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$command = $_GET["data"];
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getObject($command);
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function getObject(string $data) : object {
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return unserialize($data);
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}
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```
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