CVE-2021-38404 : Exploit Details and Defense Strategies

Delta Electronics DOPSoft 2 was found to have a critical vulnerability, a heap-based buffer overflow, that could be exploited by attackers to execute code within the current process. This CVE was published on September 9, 2021.

Understanding CVE-2021-38404

This section will provide an in-depth analysis of the vulnerability, its impact, affected systems, and mitigation strategies.

What is CVE-2021-38404?

CVE-2021-38404 is a heap-based buffer overflow vulnerability in Delta Electronics DOPSoft 2, specifically in versions 2.00.07 and prior. It arises due to inadequate validation of user-supplied data during the parsing of certain project files, allowing an attacker to trigger a buffer overflow.

The Impact of CVE-2021-38404

The impact of this vulnerability is rated as high, with a CVSS base score of 7.8, posing threats to confidentiality, integrity, and availability. As the attack complexity is low and no privileges are required, the exploit can be carried out locally without user interaction.

Technical Details of CVE-2021-38404

This section will delve into the vulnerability description, affected systems, and the mechanism of exploitation.

Vulnerability Description

The vulnerability in DOPSoft 2 stems from the lack of proper validation of user-supplied data in specific project files, resulting in a heap-based buffer overflow. This flaw can be abused by malicious actors to execute arbitrary code within the current process.

Affected Systems and Versions

Delta Electronics DOPSoft 2 versions 2.00.07 and prior are impacted by this vulnerability. Users of these versions are at risk of potential exploitation if the necessary precautions are not taken.

Exploitation Mechanism

To exploit CVE-2021-38404, attackers can craft a malicious project file containing specially designed data to trigger the buffer overflow, leading to the execution of arbitrary code.

Mitigation and Prevention

This section outlines the immediate steps to take to secure systems, establish long-term security practices, and the importance of applying patches and updates.

Immediate Steps to Take

Since DOPSoft 2 is an end-of-life product and will not receive an update to address these vulnerabilities, users are advised to transition to the replacement software recommended by Delta Electronics. This switch is crucial to mitigate the security risks posed by CVE-2021-38404.

Long-Term Security Practices

To enhance overall cybersecurity posture, organizations should implement robust security protocols, conduct regular security assessments, and provide cybersecurity awareness training to employees.

Patching and Updates

Regularly applying security patches and updates, along with monitoring security advisories, can help safeguard against known vulnerabilities and ensure the security of software and systems.