Zero Science Lab

User sessions on ABB Cylon FLXeon controllers remain active for up to seven days, even after a client-side logout. Clicking "Log Out" does not properly revoke the session on the server, allowing attackers with access to stolen session tokens to maintain unauthorized access. This increases the risk of session hijacking and privilege abuse.

The ABB Cylon FLXeon BACnet controller uses a weak set of default administrative credentials that can be guessed in remote password attacks and gain full control of the system.

An authenticated attacker can access sensitive information via the system logs page of ABB Cylon FLXeon controllers. The logs expose critical data, including the OpenSSL password for stored certificates. This information can be leveraged for further attacks, such as decrypting encrypted communications, impersonation, or gaining deeper system access.

A CSRF vulnerability has been identified in the ABB Cylon FLXeon series. However, exploitation is limited to specific conditions due to the server's CORS configuration (Access-Control-Allow-Origin: * without Access-Control-Allow-Credentials: true). The vulnerability can only be exploited under the following scenarios: Same Domain: The attacker must host the malicious page on the same domain as the target server. Man-in-the-Middle (MitM): The attacker can intercept and modify traffic between the user and the server (e.g., on an unsecured network). Local Area Network (LAN) Access: The attacker must have access to the same network as the target server. Subdomains: The attacker can host the malicious page on a subdomain if the server allows it. Misconfigured CORS: The server’s CORS policy is misconfigured to allow certain origins or headers. Reflected XSS: The attacker can exploit a reflected XSS vulnerability to execute JavaScript in the context of the target origin.

The framework suffers from an authenticated stored cross-site scripting vulnerability. Input passed to the 'content' POST parameter is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML/JS code in a user's browser session in context of an affected site.

The ABB Cylon Aspect BMS/BAS controller is vulnerable to session fixation, allowing an attacker to set a predefined PHPSESSID value. An attacker can leverage an unauthenticated reflected XSS vulnerability in jsonProxy.php to inject a crafted request, forcing the victim to adopt a fixated session.

The ABB Cylon FLXeon BACnet controller is vulnerable to an authenticated JSON flooding attack, leading to uncontrolled resource consumption and a denial-of-service (DoS) condition. The /api/serialConfig endpoint allows an authenticated attacker to abuse an unrestricted loop to create a large number of JSON objects by sending specially crafted requests through the ports JSON array. This results in excessive memory and CPU usage, causing resource exhaustion and potential service failure.

The ABB Cylon FLXeon BACnet controller is vulnerable to an unauthenticated WebSocket implementation that allows an attacker to execute the tcpdump command. This command captures network traffic and filters it on serial ports 4855 and 4851, which are relevant to the device's services. The vulnerability can be exploited in a loop to start multiple instances of tcpdump, leading to resource exhaustion, denial of service (DoS) conditions, and potential data exfiltration. The lack of authentication on the WebSocket interface allows unauthorized users to continuously spawn new tcpdump processes, amplifying the attack's impact.

The application has a hidden administrative account 'cxpro' that has write access permissions to the device.

The ABB Cylon FLXeon BACnet controller is vulnerable to authenticated remote root code execution via the /api/users/password endpoint. An attacker with valid credentials can inject arbitrary system commands by manipulating the newPassword PUT parameter. The issue arises in users.js, where the new password is hashed and improperly escaped before being passed to ChildProcess.exec() within a usermod command, allowing out of band (blind) command injection.