CVE-2021-26264 : Exploit Details and Defense Strategies

A specially crafted script could cause the DeltaV Distributed Control System Controllers (All Versions) to restart and cause a denial-of-service condition.

Understanding CVE-2021-26264

This CVE relates to the Emerson DeltaV Missing Authentication for Critical Function vulnerability.

What is CVE-2021-26264?

This vulnerability allows a specially crafted script to trigger a denial-of-service condition on DeltaV Distributed Control System Controllers across all versions.

The Impact of CVE-2021-26264

The impact of this CVE is rated as MEDIUM severity with a CVSS base score of 6.1. It has a high availability impact, affecting systems without the need for user privileges.

Technical Details of CVE-2021-26264

This section covers the technical specifics of the vulnerability.

Vulnerability Description

The vulnerability involves missing authentication for critical functions in the Emerson DeltaV system, enabling malicious scripts to cause denial-of-service incidents.

Affected Systems and Versions

All versions of the DeltaV Distributed Control System Controllers are affected by this vulnerability.

Exploitation Mechanism

The vulnerability can be exploited by executing a specially crafted script, leading to system restarts and denial-of-service conditions.

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2021-26264.

Immediate Steps to Take

Immediately apply security patches and updates provided by Emerson to mitigate the vulnerability and protect systems.

Long-Term Security Practices

Implement robust network security measures, conduct regular security audits, and ensure timely software updates to mitigate future vulnerabilities.

Patching and Updates

Regularly check for security advisories from Emerson and apply recommended patches and updates to maintain system security.