Signature Validation Bug Let Malware Bypass Several Mac Security Products

A years-old vulnerability has been discovered in the way several security products for Mac implement Apple’s code-signing API that could make it easier for malicious programs to bypass the security check, potentially leaving millions of Apple users vulnerable to hackers.

Josh Pitts, a researcher from security firm Okta, discovered that several third-party security products for Mac—including Little Snitch, F-Secure xFence, VirusTotal, Google Santa, and Facebook OSQuery—could be tricked into believing that an unsigned malicious code is signed by Apple.

Code-signing mechanism is a vital weapon in the fight against malware, which helps users identify who has signed the app and also provides reasonable proof that it has not been altered.

images from Hacker News