CVE-2021-22824 : Exploit Details and Defense Strategies

This article provides detailed information about CVE-2021-22824, a vulnerability in the Interactive Graphical SCADA System Data Collector.

Understanding CVE-2021-22824

CVE-2021-22824 is a CWE-120 vulnerability in the Interactive Graphical SCADA System Data Collector (dc.exe) that could lead to denial of service due to a missing length check on user-supplied data.

What is CVE-2021-22824?

The vulnerability, classified as CWE-120, involves a Buffer Copy without Checking Size of Input issue. It allows for denial of service by exploiting a missing length check on user-supplied data from a message received over the network.

The Impact of CVE-2021-22824

The impact of this vulnerability is the potential for an attacker to cause denial of service on affected systems, leading to disruption of services and operations.

Technical Details of CVE-2021-22824

This section covers the technical aspects of CVE-2021-22824.

Vulnerability Description

The vulnerability is a result of a missing length check on user-supplied data within a constructed message received over the network, leaving the system open to denial of service attacks.

Affected Systems and Versions

Affected systems include the Interactive Graphical SCADA System Data Collector (dc.exe) with versions up to V15.0.0.21320.

Exploitation Mechanism

The exploitation of this vulnerability involves crafting a malicious message to exploit the missing length check on user-supplied data, causing denial of service.

Mitigation and Prevention

To address CVE-2021-22824, immediate steps and long-term security practices are crucial.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Implement network segmentation to minimize the impact of potential attacks.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and maintain security measures for all systems and software components.
Conduct regular security assessments and penetration testing to detect vulnerabilities proactively.
Educate employees on cybersecurity best practices to prevent social engineering attacks.

Patching and Updates

Stay informed about security advisories and updates from the vendor to ensure the latest patches are applied to address vulnerabilities.