CVE-2021-22724 : Exploit Details and Defense Strategies

A Cross-Site Request Forgery (CSRF) vulnerability, known as CVE-2021-22724, has been identified in charging station web servers manufactured by Schneider Electric. This vulnerability could potentially be exploited by attackers to impersonate users or perform actions on their behalf.

Understanding CVE-2021-22724

This section will delve into the specifics of the CVE-2021-22724 vulnerability to provide a comprehensive understanding of the issue.

What is CVE-2021-22724?

The CVE-2021-22724 vulnerability is a CSRF flaw that allows malicious actors to submit crafted parameters in POST requests to the affected charging station web servers, enabling them to carry out unauthorized actions on behalf of users.

The Impact of CVE-2021-22724

The vulnerability poses a significant security risk as it could lead to user impersonation or unauthorized actions on the charging station web server. If exploited, attackers could manipulate the system for malicious purposes.

Technical Details of CVE-2021-22724

In this section, we will explore the technical aspects of the CVE-2021-22724 vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The CVE-2021-22724 vulnerability stems from a lack of proper validation of parameters in POST requests, allowing attackers to trick the server into executing unauthorized actions.

Affected Systems and Versions

The vulnerability impacts Schneider Electric charging stations, specifically EVlink City EVC1S22P4, EVC1S7P4, EVlink Parking EVW2, EVF2, EVP2PE, and EVlink Smart Wallbox EVB1A prior to version R8 V3.4.0.2.

Exploitation Mechanism

Exploiting CVE-2021-22724 involves crafting malicious parameters in POST requests sent to the vulnerable charging station web servers, which can then be used to impersonate users or perform unauthorized actions.

Mitigation and Prevention

This section outlines the steps that organizations and users can take to mitigate the risks associated with CVE-2021-22724 and prevent potential exploitation.

Immediate Steps to Take

To address the vulnerability, it is crucial to update the affected charging station models to version R8 V3.4.0.2 or later. Additionally, users should be cautious while interacting with the charging station interface.

Long-Term Security Practices

Implementing strong input validation mechanisms, conducting regular security assessments, and raising awareness among users about CSRF attacks are essential long-term security practices to prevent similar vulnerabilities.

Patching and Updates

Schneider Electric has released patches for the affected charging station models to address the CVE-2021-22724 vulnerability. Organizations and users are advised to promptly apply these patches to secure their systems.