Advantech iView NetworkServlet Command Injection
Posted on 18 August 2022
Advantech iView software versions prior to 5.7.04.6469 are vulnerable to an unauthenticated command injection vulnerability via the NetworkServlet endpoint. The database backup functionality passes a user-controlled parameter, backup_file to the mysqldump command. The sanitization functionality only tests for SQL injection attempts and directory traversal, so leveraging the -r and -w mysqldump flags permits exploitation. The command injection vulnerability is used to write a payload on the target and achieve remote code execution as NT AUTHORITYSYSTEM.
