Siemens SINEMA Remote Connect Server

An attacker could launch clickjacking or channel downgrade attacks against users of the SINEMA Remote Connect Server web interface, potentially tricking operators into performing unintended actions or downgrading encrypted connections to plaintext.

Organizations operating Siemens SINEMA Remote Connect Server (remote access management appliance) are affected. This impacts IT and field service personnel who use the web interface to manage remote connections to industrial control systems, particularly in water utilities and power generation facilities.

An attacker crafts a malicious web page and tricks an operator into visiting it while logged into SINEMA Remote Connect Server. The missing HTTP security headers (such as X-Frame-Options, Strict-Transport-Security, Content-Security-Policy) allow the attacker's page to frame the SINEMA interface or intercept/downgrade the connection, enabling clickjacking or man-in-the-middle attacks on the operator's session.