Lockdown Mode is described by Apple as for a small number of users whose lives and/or work make them targets for digital threats.

Lockdown Mode, schmockdown modeĪpple claimed in July that Lockdown Mode was so secure, and the company so confident in its capabilities, that it was doubling its bug bounty payouts to a max of $2 million for Lockdown Mode compromises. 'Our data shows that fake apps remain one of the top entry vectors on macOS, indicating Gatekeeper bypass techniques are an attractive and even a necessary capability for adversaries to leverage in attacks,' Bar Or wrote. Slip in the right extended attribute by using the xattr command, like a modified ACL, and you have a way to tell Gatekeeper that whatever it's looking at definitely isn't the file it's looking for, Bar Orr said. When AppleDouble files are extracted by macOS, they found, all of the file's extended attributes are also restored. Patch now: Zoom chat messages can infect PCs, Macs, phones with malwareĪ closer look at one particular vulnerability reported in 2021 led the researchers to turn to archive files as a method of bypassing Gatekeeper, and they found one in the form of AppleDouble binaries, which save metadata in a separate file.Microsoft fixes under-attack Windows zero-day Follina.Microsoft squashes six security bugs already exploited in the wild.Apple patches iPhone and macOS flaws under active attack.He said that Apple has imposed 'strong security mechanisms' on macOS to combat the use of disguised malware or legitimate-but-infected appsĪpple does that by assigning a special extended attribute to files that it uses to enforce certain policies, like Gatekeeper quarantines. But in the course of researching recent Gatekeeper bypasses the team noticed two common approaches: misusing extended attributes and finding vulnerabilities in policy check enforcers that quarantine files. Infections with macOS are often the result of users running malicious apps, Microsoft principal security researcher Jonathan Bar Or wrote in the company's report on the bug.

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