![]() ![]() Thanks to authors of public resources about macOS security for sharing knowledge with others.Mahalo to “Objective by the Sea” for inviting me to this awesome conference!.Microsoft response to my report about quarantine issues in Skype was like: “ok, nice, bye. You’ll notice that most “ DANGEROUS” executable file types belong to Windows. It’s easy to prove by checking Chrome SafeBrowsing rules. fileloc a security threat again.Īlso, Microsoft historically has issues with secure file handling in their products. At the same time, Apple grants entitlements to AppStore apps (OneDrive) to bypass quarantine. fileloc and implements secure file handling in default apps. Product companies don’t want to implement OS security features because it impacts their growth and profits. Both TCC and Quarantine impact macOS UX heavily.Do you have a hack for this? Apple: Sure, apply these entitlements. Microsoft: Hey Apple, we lose $PROFIT per year due to Quarantine dialogs. At the same time, Apple’s iCloud applies quarantine meta-attribute to synced files □ “Apple’s position is generally that sync apps do not need to have MOTW”.When big companies can obtain some specific permissions ignoring general platform rules. In my opinion, this case is pretty similar to “Hey vs Apple” case. Apple’s head of macOS security made an exception for OneDrive □.Apple “legitimately” granted OneDrive those entitlements.Apple’s position is generally that sync apps do not need to have MOTW/quarantine set on synced content. We asked for (and received) an exception from Apple’s head of macOS security to set an entitlement that does not cause the quarantine bit to be set. On the Mac, attaching a quarantine/MOTW bit has a bunch of user experience impacts that break features like Files on Demand and in general are inappropriate for a sync client.Īt one point, the Mac store app had the quarantine bit set on files automatically by the system because it was sandboxed. We do not do this on either Windows or the Mac. The ask is for a mark-of-the-web (MOTW) to be attached to files that OneDrive syncs. See slides for my talk on “Objective by The Sea v3” conference about File Quarantine issues. This behaviour allowed me to discover two Chrome and Firefox bugs: CVE-2020–6797, CVE-2020–6402 url shortcut files, those allow executing arbitrary local files by the full path at shortcut file opening. Overall, this vulnerability has affected at least 20+ apps, a significant part of the macOS ecosystem.Īpps from AppStore aren’t vulnerable to File Quarantine issues unless it’s OneDrive, which we’ll discuss later in this post.ĭuring the research, I also discovered two “insecure features” in macOS: dangerous handling of. Many popular products like Keybase, Slack, Skype, Signal, Telegram decided to fix the issue, but the vulnerability remains unfixed in file-syncing apps: Dropbox, OneDrive, Google Drive, etc. The vulnerability has low/ moderate impact, but it can be combined with other custom behaviours, and UX features to increase the severity. Popular macOS apps with a file-sharing functionality didn’t delegate file quarantine to OS leading to File Quarantine bypass (Windows MOTW analogue) for downloaded files. ![]() However, fellow Macworld author did have this problem, and he reports that the ACL method shown here did, in fact, solve the problem.A story about macOS File Quarantine, 10-year old bug, privileged OneDrive entitlements and UX security. Please note that I haven’t experienced this issue myself, so I haven’t personally tested this solution. Chmod +a 'shortusername allow list,addfile,search,delete,addsubdirectory,deletechild,readattr,writeattr,readextattr,writeextattr,readsecurity,writesecurity,chown,fileinherit,directoryinherit' /Users/shortusername/Public/Drop Box After running this command, you should find that your Drop Box works as expected, and you have full rights to files that others leave for your use. For that reason, I suggest copying this into TextEdit, editing it as needed, and then pasting it into Terminal. To do that, open Terminal, and enter this command-note that you can’t just copy and paste it as is, as you need to replace the two occurrences of shortusername with your user’s actual short username. The permanent fix to this problem is to add the proper ACL to the Drop Box folder. How Do You Insert A Video In Powerpoint For Mac To Automatically Playīest Large Format Photo Color Printer For Mac Webex Productivity Tools For Mac Outlook 2011 Tv Mirror Samsung Tv Sound Not Working For Mac How Do You Create A Folder On Microsoft Word For Mac How To Install Cracked Version Of Adobe Cs6 For Mac Word For Mac How To Select Obvjects For Grouping Outlook For Mac I Cant Click On Different Email Messages ![]()
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