ASPECT is an award-winning scalable building energy management and control solution designed to allow users seamless access to their building data through standard building protocols including smart devices.
The ABB BMS/BAS controller suffers from a remote code execution vulnerability. The vulnerable uploadFile() function in bigUpload.php improperly reads raw POST data using the php://input wrapper without sufficient validation. This data is passed to the fwrite() function, allowing arbitrary file writes. Combined with an improper sanitization of file paths, this leads to directory traversal, allowing an attacker to upload malicious files to arbitrary locations. Once a malicious file is written to an executable directory, an authenticated attacker can trigger the file to execute code and gain unauthorized access to the building controller.