Huancheng Hu

**Name of the Vulnerable Software and Affected Versions** Setracker2 Android Companion App com.tgelec.setracker versions prior to 3.1.6 **Description** The application uses a predictable registration ID derived from the International Mobile Equipment Identity (IMEI), which is a unique identifier for mobile devices. The enrollment system does not require additional authentication before assignment. An attacker who obtains the registration ID can arbitrarily enroll watches belonging to other users. **Recommendations** Update Setracker2 Android Companion App com.tgelec.setracker to version 3.1.6 or later.

**Name of the Vulnerable Software and Affected Versions** Setracker2 Android Companion App com.tgelec.setracker versions prior to 3.1.6 **Description** The application encrypts requests between the watch and its backend using static hardcoded AES keys and initialization vectors. This flaw allows an attacker to decrypt the traffic transmitted by the Setracker2 watch. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Setracker2 Android Companion App versions prior to 3.1.6 **Description** The application uses MD5, a broken cryptographic hash function, to generate a request signature for authenticating communications between the mobile client and the backend REST API. This weakness allows attackers to potentially reverse the signature to recover the `session ID`. Once the `session ID` is exposed, an attacker can impersonate a legitimate user to issue authenticated API requests. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Setracker2 Android Companion App com.tgelec.setracker versions prior to 3.1.6 **Description** The application only requires the password hash when authenticating with backend services from the client. This flaw allows an attacker who possesses the hash to bypass standard authentication and gain full access to the account. **Recommendations** Update to a version newer than 3.1.5.