Kaspersky publishes information on newly identified vulnerabilities in order to raise user awareness of the IT security threats detected. Kaspersky does not make any guarantees in respect of information received from vendors of products in which vulnerabilities have been identified, which is included in the following sections of the advisory: Affected Products, Vendor Mitigation.
|Researcher||Alexander Nochvay, Kaspersky ICS CERT|
|Description||By exploiting the vulnerability, a user with “Read Only” privilege level can send requests via the web console to have the device’s configuration changed.|
|Impact||A remote attacker that has an account with “Read Only” privileges is able to execute requests, that should only be available to users with “Read Write” privileges.|
|CVSS v3 Base Score:||9.9|
|Exploitability||Remotely exploitable: network access to port 80/TCP or 443/TCP is required|
|Difficulty||Low skill level to exploit|
|Privilege required||Low privilege level required: an account with “Read Only” privileges is required|
|Scope||Scope changed: the security of serial devices connected to NPort can be affected|
|Existence of exploit||Unknown|
|Affected products||NPort IA5150A-IEX
You can download new firmware from here.
Disable all unused user accounts with “Read Only” privileges
Set up a border firewall (or a similar network traffic control solution) passing traffic into the device’s network segment to allow traffic to ports 80/TCP, 443/TCP from authorized parties only.
Disable all unused network services
Firewall. Configure the firewall to restrict access to the industrial network in such a way that only essential communications from authorized sources are allowed. This will help reduce the attack surface. Make sure that the firewall restrictions do not affect core business workflows.
VPN. Use virtual private networks (VPN) to secure remote access to the industrial network. A VPN encrypts network traffic between VPN clients and the VPN server, as well as providing secure authorized access to local resources on the company’s internal network. Traffic encryption protects against traffic eavesdropping attacks, including man-in-the-middle (MitM) and other types of traffic analysis attacks.
Network monitoring. Implement a network intrusion detection solution (NIDS). A comprehensive IDS solution is capable of detecting unusual network connections and abnormal traffic sent to the device, providing timely information about various suspicious activities and sufficiently reducing the attacker’s chances of successful exploitation.
Network segmentation. Compartmentalize your network: implement network segmentation and strict access control for each segment to provide more comprehensive and effective protection against a wide range of threats. Proper network segmentation prevents attackers from reaching critical assets in the event of a network breach
|Timeline||14.08.2020 – Vulnerability reported
24.08.2020 – Moxa confirmed the vulnerability
28.04.2021 – Moxa published the advisory