Brute-forcing a macOS user’s real name from a browser using mDNS
Blog post from Fingerprint
An exploration into privacy vulnerabilities in Apple devices reveals a technique for disclosing a macOS user's first name without permissions using the multicast DNS (mDNS) protocol, a component of Apple's Bonjour feature. This method leverages a brute-force approach with a list of common names and locales to guess the user's name, achieving a 65% success rate. Despite the limitations and impracticality of this attack, which can be detected via browser developer tools, it underscores potential privacy risks associated with device name exposure over local networks. The article advocates for open discussions to prompt quick fixes by browser providers, and while the method is primarily discussed in the context of Apple devices, it could be adapted for use in discovering various IoT devices on local networks.
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