Zoom vulnerability can leak your Windows login name and password
Zoom is having a moment right now. Information technology's become the go-to form of communication for many people during the current wellness crunch. Unfortunately, a vulnerability within Zoom can allow hackers to obtain people'southward Windows login name and password. Security researcher and Twitter user Mitch (@_g0dmode) spotted the vulnerability showtime. BleepingComputer then followed upwardly with its own investigation and testing.
The core of the result revolves around how Zoom handles URLs. When you send a URL within a Zoom conversation, the programme converts information technology into a link. That'due south handy for websites, but the problem is that Zoom besides converts Windows networking UNC paths into links. If someone clicks a link that's a UNC path, Windows will endeavor to connect to the remote site the path goes to using SMB file-sharing protocol. By default, this action volition crusade Windows to send a person's login name and their NTM password hash. The NTLM password hash tin can exist croaky using free tools, such as Hashcat, and reveal someone's password.
Security researcher Matthew Hickey (@HackerFantastic) tested this process and was able to get NTLM password hashes using the vulnerability. BleepingComputer replicated the procedure besides. BleepingComputer was able to dehash an "like shooting fish in a barrel password" in just 16 seconds.
In addition to helping hackers obtain people's passwords, the same procedure tin as well be used to launch programs on people'due south computers. Fortunately, Windows will prompt yous when this happens and enquire if you want to run the program.
How to gear up Zoom's Windows x user-info and password-leak bug
Hickey spoke to BleepingComputer about how to ready the issue, stating, "Zoom should not render UNC paths as hyperlinks is the fix, I accept notified Zoom as I disclosed it on Twitter."
Until Zoom issues a fix, you tin preclude NTML credentials from being automatically sent to a remote server when you click a UNC link. This is done with a Group Policy. Bleeping Figurer outlines the process and nosotros also accept our own guide on how to do it.
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Source: https://www.windowscentral.com/zoom-vulnerability-can-leak-your-windows-login-name-and-password
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