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Zoom Enable Video Mac OS And PowerPointThey come from brands including Nintendo, Disney, Netflix and Marvel as well as sites like Unsplash (a library of free stock photography), Canva (an online design tool) and Modsy (an e-interior design service). Add Zoom as an Add-in for Outlook on the web. At the bottom of the client, click the up arrow next to Stop Video.Mac 2 screens. Connect a second display (here are nine options for a second display) and extend your displayArrange the displays in the Mac OS and PowerPoint to match the physical setup Start Presenter View in PowerPoint so the slides are on one screen and Presenter View is on the screen that has the webcam (so you are looking at the webcam while seeing your notes)After configuring your profile, we recommend going to the My Meeting Settings (MAC)/Meetings Settings. (Windows) tab to configure your preferences based on. In the Virtual Background tab, select one of Zoom's defaults or upload your own image.Zoom invited the researcher to join our private paid bug bounty program, which he declined because of non-disclosure terms. It includes the classic tropes:> Our video-first platform is a key benefit to our users around the world, and our customers have told us that they choose Zoom for our frictionless video communications experience.* We have no way of knowing if this has been exploited in the wild, so it’s probably fine> Also of note, we have no indication that this has ever happened.* Other products have the same vulnerability> We are not alone among video conferencing providers in implementing this solution.> Ultimately, Zoom decided not to change the application functionalityAnd also a lovely one I haven’t seen before:* We tried to buy the researcher’s silence, but he refused> Upon his initial communication to Zoom, the researcher asked whether Zoom provides bounties for security vulnerability submissions. Download the Zoom app for iOS to your iPhone or iPad Zoom’s response to this is a wonderful example of how not to respond to security issues. Open the app, sign in and join a meeting. Tap the three dots at the bottom right to open the More menu.These are minor steps, even for a regular user, and ones with which most users are likely already familiar.To me this further illustrates that the web server is truly just a ploy on Zoom's part to keep their hooks in users' systems, and have a way in that the user isn't privy to. You can ask your browser to remember the link association and not be prompted for which app the link should open going forward. If you don't have the client installed the page can prompt you to download it the same as it would the very first time you download and install it. When I visit a Zoom join link or the POC link above, Firefox prompts me to open the Zoom client to join the meeting, and when I click "Open Link" the client opens just as it should and joins the meeting.This seems to confirm that there is no functionality to create a seamless experience for the user that actually requires the presence of the web server. Team reisI will be switching ~/.zoomus/ZoomOpener.app off, and considering other options until it has been fixed.> This vulnerability leverages the amazingly simple Zoom feature where you can just send anyone a meeting link (for example ) and when they open that link in their browser their Zoom client is magically opened on their local machine. My reply to their support team:I do not believe this is a fair trade-off - allowing any arbitrary web site local control of privileged software installed on my machine - because Safari offers a security prompt (specifically so that any arbitrary web site does not gain control of privileged software on my machine). We are not alone among video conferencing providers in implementing this solution.I do not believe that this is a fair trade-off given that any website can act on this locally installed server.EDIT: I think they need to be made aware that this isn't acceptable. We feel that this is a legitimate solution to a poor user experience problem, enabling our users to have faster, one-click-to-join meetings. The local web server enables users to avoid this extra click before joining every meeting. The key thing here is they think this is a fair trade-off because Safari asks if you want to open Zoom.> This is a workaround to a change introduced in Safari 12 that requires a user to confirm that they want to start the Zoom client prior to joining every meeting. We have lots of users, and lots of success having this option turned on by default. We will be sure to keep you informed of our plans in this regard.We don't care. Less clicks equals less thinking.> Such configuration options are available in the Zoom Meeting client audio and video settings.Stop complaining about this as we have given ourselves a legally compelling user defined control hidden in a single tab deep within our preferences.> However, we also recognize the desire by some customers to have a confirmation dialog before joining a meeting.We can tell you aren't going to drop this.> Based on your recommendations and feature requests from other customers, the Zoomteam is evaluating options for such a feature, as well as additional account level controls over user input device settings. This wouldn't require a third-party daemon of any sort, and would just be a regular application that the user could trivially uninstall.Is there a security hole there that I'm missing? Or have I misunderstood the author's point?If you want to really break down their viewpoint on the situation, lets translate their PR statement line by line:> Zoom believes in giving our customers the power to choose how they want to Zoom.Zoom believes if their app isn't convenient to use, their customers have the power to leave their ass, as they are in an incredibly competitive market.> This includes whether they want a seamless experience in joining a meeting with microphone and video automatically enabled, or if they want to manually enable these input devices after joining a meeting.This includes making sure that they aren't asked to provide confirmation to access their camera/microphone, which impedes the convenience of the app to all participants. Nor can I figure out a good way to do this that doesn’t require an additional bit of user interaction to be secure.Does anybody understand (and have a moment to explain) why the author says this is difficult to do securely? macOS has a simple facility for handling custom URL schemes, so my impulse would be to have ` ` do a server-side redirect to a URL like, say, `zoomus://492468757`, which would launch Zoom locally using the OS's built-in services. Come to find out, it really hadn’t been implemented securely. ![]() Once the update is complete, the local web server will be completely removed on that device. Once the patch is deployed, Mac users will be prompted in the Zoom user interface (UI) to update their client. Remove the local web server entirely, once the Zoom client has been updated – We are stopping the use of a local web server on Mac devices. Hence any popular software using this install-from-uri-handler becomes an appealing target for malicious actors to mimic, which they will.- some proportion of users will likely install from malicious links, and whichever product (let's say Zoom for example) is the most likely software for malicious actors to masquerade as will become the name associated with the attack in the mind of the wounded publicIn response to all of the well-deserved criticism, Zoom just made two updates to their blog post to announce that they will be completely removing the webserver for all macOS users in a new release tonight, and also adding an option prompt going forward:JULY 9 PATCH: The patch planned for tonight (July 9) at or before 12:00 AM PT will do the following: 1. ![]()
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