Apple macOS High Sierra Exploit Lets Hackers Steal Keychain Passwords in Plaintext

Apple yesterday rolled out a new version of its macOS operating system, dubbed High Sierra 10.13—a few hours before an ex-NSA hacker publicly disclosed the details of a critical vulnerability that affects High Sierra as well as all earlier versions of macOS.
Patrick Wardle, an ex-NSA hacker and now head of research at security firm Synack, found a critical zero-day vulnerability in macOS that