CVE-2019-3974 : Exploit Details and Defense Strategies

A vulnerability was identified in versions of Nessus prior to 8.5.2 for Windows systems, allowing unauthorized overwriting of specific system files, potentially leading to a denial of service situation.

Understanding CVE-2019-3974

This CVE pertains to a vulnerability in Tenable Nessus versions prior to 8.6.0.

What is CVE-2019-3974?

Nessus versions prior to 8.5.2 for Windows systems had a flaw that enabled the unauthorized overwriting of specific system files, posing a risk of denial of service.

The Impact of CVE-2019-3974

The vulnerability could allow attackers to overwrite critical system files, potentially causing a denial of service scenario on affected Windows systems.

Technical Details of CVE-2019-3974

This section provides more technical insights into the vulnerability.

Vulnerability Description

The issue in Nessus versions prior to 8.5.2 on Windows platforms allowed for arbitrary overwriting of system files, creating a potential denial of service condition.

Affected Systems and Versions

Product: Tenable Nessus
Versions Affected: All versions prior to 8.6.0

Exploitation Mechanism

The vulnerability could be exploited by malicious actors to overwrite critical system files, leading to a denial of service situation.

Mitigation and Prevention

Protective measures and actions to address the CVE.

Immediate Steps to Take

Update Nessus to version 8.6.0 or later to mitigate the vulnerability.
Monitor system files for unauthorized changes.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Apply security patches and updates promptly to ensure system integrity and protection against vulnerabilities.