Anhui Huami Mi Fit Android Application - Unencrypted Update Check -- https://www.info-sec.ca/advisories/Huami-Mi-Fit.html
Overview "Mi Fit tracks your activity, analyzes sleep, and evaluates your workouts." (https://play.google.com/store/apps/details?id=com.xiaomi.hm.health) Issue The Anhui Huami Mi Fit Android application (version 4.0.10 and below), does not encrypt the connection when it checks for an update. Impact An attacker who can monitor network traffic may be able to tamper with the application's update function. Timeline October 21, 2019 - Attempted to obtain a security contact via an email to supp...@amazfit.com October 22, 2019 - Provided the details to CERT/CC October 23, 2019 - CERT/CC opened a case for tracking November 4, 2019 - Attempted to obtain a security contact via an email to secur...@xiaomi.com Solution Upgrade to version 4.0.11 or later
