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CVE-2020-24364

Description

When @4nqr34z and myself, @theart42, were looking into new software for a CTF box, we came across an injection in MineTime that could lead to remote code execution.

Use the following payload for the notes field::

><img src="x" id="require('child_process').exec('ping 192.168.1.1')" onerror=eval(id)>

TimeLine

When a user opens the event, this code is executed on the local machine.

Exploitation

A malicious actor needs to send an invite to a victim with the code in the notes field and then just waits for the user to open the event.

TimeLine

Code is executed under the privilege of the user.

Mitigation

The developer has been notified and has an update version available.