CVE-2023-49956 Explained : Impact and Mitigation

A vulnerability has been identified in Dalmann OCPP.Core that could allow an attacker to terminate active transactions by sending a StopTransaction message with any random transactionId.

Understanding CVE-2023-49956

This section will provide insights into the impact and technical details of CVE-2023-49956.

What is CVE-2023-49956?

CVE-2023-49956 is a security issue discovered in Dalmann OCPP.Core versions prior to 1.3.0 for OCPP (Open Charge Point Protocol). It allows an attacker to terminate active transactions using a StopTransaction message with any random transactionId.

The Impact of CVE-2023-49956

The vulnerability in Dalmann OCPP.Core could result in unauthorized termination of electric vehicle charging transactions, leading to service disruption and financial loss for users and service providers.

Technical Details of CVE-2023-49956

Let's delve into the specifics of the vulnerability affecting OCPP.Core.

Vulnerability Description

The issue arises from insufficient validation of the transactionId parameter in the StopTransaction message, enabling an attacker to prematurely end ongoing transactions.

Affected Systems and Versions

All versions of Dalmann OCPP.Core prior to 1.3.0 are impacted by this vulnerability, exposing electric vehicle charging infrastructure to exploitation.

Exploitation Mechanism

By sending a crafted StopTransaction message with a random transactionId, an attacker can trigger the unintended termination of active charging sessions.

Mitigation and Prevention

Discover the steps to secure your systems and prevent exploitation of CVE-2023-49956.

Immediate Steps to Take

Update Dalmann OCPP.Core to version 1.3.0 or above to patch the vulnerability.
Monitor charging sessions for any suspicious activity that may indicate unauthorized termination.

Long-Term Security Practices

Regularly assess and update your electric vehicle charging infrastructure to address emerging security risks.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Stay informed about security patches and updates released by Dalmann OCPP.Core to protect your systems from known vulnerabilities.