CVE-2020-6086 Explained : Impact and Mitigation

An exploitable denial of service vulnerability exists in the ENIP Request Path Data Segment functionality of Allen-Bradley Flex IO 1794-AENT/B. A specially crafted network request can cause a loss of communications with the device resulting in denial-of-service.

Understanding CVE-2020-6086

This CVE involves a denial of service vulnerability in Allen-Bradley Flex IO 1794-AENT/B.

What is CVE-2020-6086?

The vulnerability allows an attacker to disrupt communications with the device by sending a malicious network request, leading to a denial-of-service condition.

The Impact of CVE-2020-6086

The vulnerability has a CVSS base score of 7.5, indicating a high severity level with a significant impact on availability.

Technical Details of CVE-2020-6086

This section provides technical details of the vulnerability.

Vulnerability Description

The flaw exists in the ENIP Request Path Data Segment functionality of Allen-Bradley Flex IO 1794-AENT/B, triggered by a specially crafted network request.

Affected Systems and Versions

Product: Allen Bradley
Version: Allen-Bradley Flex IO 1794-AENT/B 4.003

Exploitation Mechanism

An attacker can exploit the vulnerability by sending a malicious packet that triggers the flaw.
If the Simple Segment Sub-Type is provided, the device misinterprets the Data Size, leading to a fault state and loss of communication.

Mitigation and Prevention

Protecting systems from CVE-2020-6086 is crucial to prevent denial-of-service attacks.

Immediate Steps to Take

Apply vendor-supplied patches or updates to address the vulnerability.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly monitor network traffic for any suspicious activity.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Stay informed about security advisories from the vendor.
Keep systems up to date with the latest patches and security fixes.