CVE-2021-44221 Explained : Impact and Mitigation
Discover the impact of CVE-2021-44221 on SIMATIC eaSie Core Package versions lower than V22.00. Learn about the exploitation risk and mitigation steps.
A vulnerability has been identified in SIMATIC eaSie Core Package (All versions < V22.00) that could lead to a denial of service attack.
Understanding CVE-2021-44221
This CVE involves a lack of input validation in the SIMATIC eaSie Core Package, potentially enabling a remote attacker to disrupt the affected system.
What is CVE-2021-44221?
The vulnerability in the SIMATIC eaSie Core Package allows attackers to exploit the message passing framework's improper input validation, leading to a denial of service risk.
The Impact of CVE-2021-44221
The vulnerability could be abused by remote attackers to trigger a denial of service on systems running affected versions of SIMATIC eaSie Core Package.
Technical Details of CVE-2021-44221
This section outlines specific technical details of the vulnerability.
Vulnerability Description
The issue stems from inadequate input validation on affected systems utilizing SIMATIC eaSie Core Package, posing a risk of denial of service attacks.
Affected Systems and Versions
- Product: SIMATIC eaSie Core Package
- Vendor: Siemens
- Versions Affected: All versions less than V22.00
Exploitation Mechanism
The vulnerability arises due to the failure to properly validate input within the message passing framework, creating an avenue for remote attackers to disrupt system operations.
Mitigation and Prevention
To address CVE-2021-44221, follow these mitigation steps:
Immediate Steps to Take
- Siemens advises updating affected systems to version V22.00 or higher.
- Implement network segmentation to limit attacker access.
- Monitor network traffic for any abnormal patterns.
Long-Term Security Practices
- Regularly train staff on identifying suspicious activity.
- Employ intrusion detection/prevention systems to enhance security posture.
- Stay informed on emerging vulnerabilities and patches.
- Conduct regular security audits to evaluate system robustness.
Patching and Updates
Ensure timely installation of vendor-released patches and updates to remediate vulnerabilities.