published November 14, 2019
🚨 No login required! Unauthenticated attackers can drop TCL scripts through the web interface of eQ-3 Homematic CCU2 and CCU3 like a delivery person leaving packages at a doorstep without checking who they’re for! 🔥 Think of it as a restaurant where anyone can walk in and place orders without needing to know the secret menu. Without proper checks, any malicious customer could request anything on the menu, including some not-so-nice surprises! An attacker could exploit this by sending harmful scripts, allowing them to execute arbitrary commands on your device. This could lead to unauthorized access and control over your smart home, potentially turning your convenient setup into a security nightmare!
Think of it as a restaurant where anyone can walk in and place orders without needing to know the secret menu. Without proper checks, any malicious customer could request anything on the menu, including some not-so-nice surprises! The vulnerability exists in the exec.cgi and exec1.cgi scripts of the eQ-3 Homematic CCU2 and CCU3 systems, which accept TCL script content from unauthenticated HTTP POST requests, enabling remote code execution without any authentication checks.
An attacker could exploit this by sending harmful scripts, allowing them to execute arbitrary commands on your device. This could lead to unauthorized access and control over your smart home, potentially turning your convenient setup into a security nightmare! To protect your device, ensure that you restrict access to the web interface, ideally by implementing strong authentication. Additionally, check for any available firmware updates from eQ-3 that may address this vulnerability and apply them promptly. You can tackle this! Follow these steps and put your smart home back in your hands. 🛡️