Micca KE700 Car Alarm System RF Communication Vulnerability Allowing Interception of Sensitive Data

A vulnerability exists in the Micca KE700 car alarm system due to the RF communication protocol's lack of encryption, leaving data frames exposed. This flaw allows an attacker with a radio interception tool to capture sensitive information, such as the Key Fob ID and rolling code counters, transmitted in cleartext. The KE700 version is affected, and the vulnerability arises from a fundamental design flaw in the system's rolling code implementation, which does not secure transmissions, enabling potential brute-force attacks.

Impact

Exploitation of this vulnerability allows for the passive interception of unencrypted rolling code transmissions, including critical authentication data such as the Key Fob ID and counter values. This information disclosure is a prerequisite for launching a brute-force attack on the system's rolling code authentication.

Remediation

It is recommended to implement encryption for the entire transmission frame using a standard symmetric algorithm, such as AES-128. Additionally, the encrypted payload should include a Message Authentication Code (MAC) to prevent tampering or spoofing.