CVE-2018-10404: Objective-See Knockknock

High severity, CVSS 7.8. EPSS: 0.9% chance of exploitation in the next 30 days.

An issue was discovered in Objective-See KnockKnock, LuLu, TaskExplorer, WhatsYourSign, and procInfo. A maliciously crafted Universal/fat binary can evade third-party code signing checks. By not completing full inspection of the Universal/fat binary, the user of the third-party tool will believe that the code is signed by Apple, but the malicious unsigned code will execute.

Affected products

• Objective-See Knockknock: up to and including 1.9.3
• Objective-See Lulu: up to and including 0.9.8
• Objective-See Procinfo: affected versions not specified
• Objective-See Taskexplorer: up to and including 1.6.0
• Objective-See Whatsyoursign: up to and including 1.4.0

Published 2018-06-13. Last modified 2026-06-17.