CVE-2021-33009 : Exploit Details and Defense Strategies

A detailed overview of CVE-2021-33009, a vulnerability in mySCADA myPRO prior to version 8.20.0 that allows unauthenticated remote attackers to upload arbitrary files to the file system.

Understanding CVE-2021-33009

This section will cover what CVE-2021-33009 is and its impact, technical details, and mitigation strategies.

What is CVE-2021-33009?

CVE-2021-33009 refers to the vulnerability found in mySCADA myPRO versions earlier than 8.20.0, enabling unauthenticated remote attackers to upload files to the file system.

The Impact of CVE-2021-33009

The vulnerability poses a high severity threat with a CVSS base score of 7.5, granting attackers the ability to compromise the integrity of the system without requiring any user privileges.

Technical Details of CVE-2021-33009

This section explores the specifics of the vulnerability, including the description, affected systems, and the exploitation mechanism.

Vulnerability Description

The flaw in mySCADA myPRO versions pre-8.20.0 allows unauthenticated remote attackers to upload arbitrary files to the file system, posing a significant security risk.

Affected Systems and Versions

The vulnerability impacts mySCADA myPRO versions prior to 8.20.0, leaving them susceptible to unauthorized file uploads by remote attackers.

Exploitation Mechanism

Attackers with network access can exploit this flaw, potentially compromising system integrity without the need for user interaction.

Mitigation and Prevention

In this section, we discuss immediate steps to take and long-term security practices to prevent exploitation of CVE-2021-33009.

Immediate Steps to Take

Users are strongly advised to apply the recommended update to version 8.20.0 or later from mySCADA, ensuring the patch is applied promptly.

Long-Term Security Practices

Implementing robust security measures, such as regular system updates, network segmentation, and access controls, can help bolster overall security posture.

Patching and Updates

Regularly monitoring for security updates and promptly applying patches is crucial to safeguard against known vulnerabilities.