CVE-2023-35120 : What You Need to Know

A cross-site request forgery vulnerability has been discovered in PiiGAB M-Bus software, allowing attackers to execute unauthorized commands. Here's what you need to know about CVE-2023-35120.

Understanding CVE-2023-20657

PiiGAB M-Bus is susceptible to cross-site request forgery, posing a risk of command execution by attackers through phishing methods.

What is CVE-2023-20657?

PiiGAB M-Bus is vulnerable to cross-site request forgery. Attackers can exploit this issue by sending phishing emails to device owners to execute unauthorized commands.

The Impact of CVE-2023-20657

The vulnerability allows attackers to manipulate devices by tricking users into clicking on malicious links, potentially leading to unauthorized actions being performed.

Technical Details of CVE-2023-20657

The vulnerability is rated with a CVSSv3 base score of 8.8, indicating a high severity issue with significant impact on confidentiality, integrity, and availability of affected systems.

Vulnerability Description

PiiGAB M-Bus is prone to cross-site request forgery, enabling attackers to execute unauthorized commands through phishing techniques.

Affected Systems and Versions

The vulnerability affects PiiGAB M-Bus software version 900S.

Exploitation Mechanism

Attackers can exploit this issue by sending phishing emails containing malicious links to device owners, leveraging stored cookies for unauthorized command execution.

Mitigation and Prevention

Mitigate the risks associated with CVE-2023-20657 by following these guidelines:

Immediate Steps to Take

Adhere to the principle of least-privilege user accounts.
Ensure strong and unique passwords are set for all devices requiring authentication.
Minimize network exposure and restrict Internet accessibility.
Segregate control system networks from business networks behind firewalls.
Use secure methods like VPNs for remote access and keep them updated.

Long-Term Security Practices

Regularly update software and firmware to mitigate security vulnerabilities.

Patching and Updates

PiiGAB has released updated software to address the vulnerabilities. Users are advised to install the new update via the web UI on their gateway.