You’ve probably heard of the popular video conferencing platform, Zoom. This platform enables its millions of users in various locations to virtually meet face to face. In an effort to enhance user experience and work around changes in Safari 12, Zoom installed a web server that allows users to enjoy one-click-to-join meetings. Unfortunately, a security researcher recently disclosed that this product feature acts as a flaw that could allow cybercriminals to activate a Mac user’s webcam without their permission.
How exactly does this vulnerability work? Cybercriminals are able to exploit a feature that allows users to send a meeting link directly to a recipient. When the recipient clicks on the link, they are automatically launched into the video conferencing software. If the user has previously installed the Zoom app onto their Mac and hasn’t turned off their camera for meetings, Zoom will auto-join the user to a conference call with the camera on. With this flaw, an attacker can send a victim a meeting link via email message or web server, allowing them to look into a victim’s room, office, or wherever their camera is pointing. It’s important to note that even if a user has deleted the Zoom app from their device, the Zoom web server remains, making the device susceptible to this vulnerability.
While the thought of someone unknowingly accessing a user’s Mac camera is creepy, this vulnerability could also result in a Denial of Service (DoS) attack by overwhelming a user’s device with join requests. And even though this patch has been successfully patched by Zoom, it’s important for users to realize that this update is not enforced by the platform. So, how can Zoom users avoid getting sucked into a potentially malicious call? Check out these security tips to stay secure on conference calls:
- Adjust your Zoom settings. Users can disable the setting that allows Zoom to turn your camera on when joining a meeting. This will prevent a hacker from accessing your camera if you are sent a suspicious meeting link.
- Update, update, update. Be sure to manually install the latest Zoom update to prevent DoS or other potential attacks. Additionally, Zoom will introduce an update in July that allows users to apply video preferences from their first call to all future calls. This will ensure that if a user joins their first meeting without video, this setting will remain consistent for all other calls.