CVE-2021-22747 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2021-22747, which involves an Improper Check for Unusual or Exceptional Conditions vulnerability in Triconex Model 3009 MP installed on Tricon V11.3.x systems. The vulnerability can lead to module reset under specific conditions. Learn about the impact, technical details, and mitigation methods associated with this CVE.

Understanding CVE-2021-22747

CVE-2021-22747 is an Improper Check for Unusual or Exceptional Conditions vulnerability affecting Triconex Model 3009 MP on Tricon V11.3.x systems, potentially leading to a module reset due to malformed TriStation packets.

What is CVE-2021-22747?

CVE-2021-22747 is a security flaw in Triconex Model 3009 MP systems on Tricon V11.3.x, where a module reset can occur if the TCM receives malformed TriStation packets while the write-protect keyswitch is in the program position.

The Impact of CVE-2021-22747

The vulnerability could allow an attacker to trigger a module reset in affected systems, potentially disrupting critical processes and causing operational issues.

Technical Details of CVE-2021-22747

CVE-2021-22747 is categorized under CWE-754, involving an Improper Check for Unusual or Exceptional Conditions. Below are further technical details:

Vulnerability Description

The vulnerability in Triconex Model 3009 MP on Tricon V11.3.x systems stems from inadequate validation of TriStation packets, leading to a module reset in specific conditions.

Affected Systems and Versions

Triconex Model 3009 MP installed on Tricon V11.3.x systems are impacted by CVE-2021-22747. Ensure proper assessment and monitoring of these systems for security risks.

Exploitation Mechanism

Exploiting this vulnerability involves sending malformed TriStation packets to the TCM while the write-protect keyswitch is in the program position, triggering a module reset.

Mitigation and Prevention

Addressing CVE-2021-22747 requires immediate actions and long-term security practices to safeguard vulnerable systems.

Immediate Steps to Take

Organizations should restrict network access, apply security patches, and monitor for any unusual activities that may indicate exploitation of the vulnerability.

Long-Term Security Practices

Implementing network segmentation, regular security assessments, and employee training on cybersecurity best practices can enhance the overall security posture.

Patching and Updates

Stay informed about security updates and patches released by the vendor to remediate the vulnerability efficiently and prevent potential exploitation.