CVE-2021-22741 Explained : Impact and Mitigation

A vulnerability labeled as Use of Password Hash with Insufficient Computational Effort has been discovered in ClearSCADA, EcoStruxure Geo SCADA Expert 2019, and EcoStruxure Geo SCADA Expert 2020. This vulnerability could lead to the exposure of account credentials, making the systems vulnerable to password decryption attacks.

Understanding CVE-2021-22741

This section will provide important insights into the CVE-2021-22741 vulnerability.

What is CVE-2021-22741?

The vulnerability CVE-2021-22741, also known as Use of Password Hash with Insufficient Computational Effort, affects ClearSCADA, EcoStruxure Geo SCADA Expert 2019, and EcoStruxure Geo SCADA Expert 2020. It can potentially reveal account credentials when server database files are accessible, posing a risk of password decryption attacks.

The Impact of CVE-2021-22741

The exposure of database files to an attacker can result in the compromise of user account password hashes, making the system susceptible to password decryption attacks. It is crucial to address this vulnerability promptly to prevent unauthorized access and data breaches.

Technical Details of CVE-2021-22741

Let's delve into the technical aspects of CVE-2021-22741 to understand how this vulnerability can be exploited.

Vulnerability Description

The vulnerability arises due to the use of password hash with insufficient computational effort in ClearSCADA, EcoStruxure Geo SCADA Expert 2019, and EcoStruxure Geo SCADA Expert 2020. When specific server database files are exposed, the system becomes vulnerable to password decryption attacks.

Affected Systems and Versions

ClearSCADA (all versions), EcoStruxure Geo SCADA Expert 2019 (all versions), and EcoStruxure Geo SCADA Expert 2020 (V83.7742.1 and prior) are impacted by this vulnerability. Users of these systems should take immediate action to mitigate the associated risks.

Exploitation Mechanism

The vulnerability can be exploited by gaining access to server database files, which could enable threat actors to decrypt user account password hashes. By leveraging this weakness, attackers can potentially compromise the integrity and confidentiality of sensitive data.

Mitigation and Prevention

To address CVE-2021-22741 effectively, it is essential to implement appropriate mitigation strategies and security measures.

Immediate Steps to Take

Users are advised to restrict access to server database files and implement strong access control mechanisms. Additionally, promptly applying security patches and updates can help safeguard the systems against exploitation.

Long-Term Security Practices

In the long term, organizations should prioritize regular security assessments, user training on cybersecurity best practices, and the adoption of robust password policies to enhance overall security posture.

Patching and Updates

Vendor-supplied patches and updates play a critical role in remedying CVE-2021-22741. Organizations should closely monitor security advisories from the respective vendors and perform timely patch deployments to mitigate the risks associated with this vulnerability.