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TechTidBit – Tips and advice for small business computing – Tech Experts™ – Monroe Michigan

TechTidBit - Tips and advice for small business computing - Tech Experts™ - Monroe Michigan

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Zoom Zero-Day Bug: Webcam Hijacking And Other Intrusive Exploits

August 22, 2019

Jason Cooley is Support Services Manager for Tech Experts.

Internet safety is always a concern and there are a large number of tools available to assist with that. Depending on how much security you need, you may need to run multiple pieces of software. Antivirus, antimalware, firewalls, and even 2-factor authentication are security measures all doing different things.

Even with all of these types of security layers in place, there is no such thing as guaranteed safety. You can be as careful as possible and avoid anything seemingly questionable, but one thing you can’t avoid are security exploits.

An exploit could be used to track a user’s history, and possibly even every keystroke. This could potentially send passwords for anything you enter on the computer.

Recently, Zoom, a video conferencing application, was discovered to have a severe vulnerability on the Mac platform. This exploit was a very simple one: a person attempting to access your webcam could send a legitimate Zoom meeting invite, but set with certain settings on a certain server.

When the link is clicked, even without accepting the invite, the client is silently launched, turning on the end user’s webcam. Even if the Mac user had uninstalled Zoom, the client would silently reinstall and launch.

Back in 2017, a much larger user base was at severe risk of an exploit that would allow hackers to silently install malware to take remote control of the user’s computer. The CVE-2017-11882 exploit was a flaw in Microsoft Office software.

If Office was installed, a Visa paylink email was sent, and when the user opened the word document attached, it launched a PowerShell command installing Cobalt Strike, granting remote control to whoever deployed it.

It was not long before Microsoft had a security fix rolled out, but if the software was installed prior to installing the security update, the remote control software would persist and have free reign on not only one computer, but also be able to travel through the network.

These vulnerabilities are discovered in normal software and have been found in Windows’ core system more times than you probably realize. Microsoft is typically quick to roll out updates when they have the power to fix the flaw, even if it isn’t their software. This illustrates the great importance of keeping Windows up to date.

Sure, if you are at work and have an IT team like the staff at Tech Experts, your updates are managed and prioritized. While some updates are optional or just good for a more user-friendly experience, important security updates should always be installed as soon as possible.

As Windows 7 updates come to an end this year, any of these types of exploits will remain unfixed. Switching to Windows 10 or replacing your computer is the only way to keep getting the latest patches for these intrusive exploits.

If you are already on Windows 10, make sure you have antivirus installed. As always, check your system regularly for updates and get help if you need it – your safety depends on it.

Filed Under: Online Security, Vulnerability Tagged With: online security, vulnerabilities

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