CVE-2020-6087 : Vulnerability Insights and Analysis

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. This vulnerability has a CVSS base score of 7.5.

Understanding CVE-2020-6087

This CVE involves a denial of service vulnerability in Allen-Bradley Flex IO 1794-AENT/B due to a specific network request triggering a fault state that leads to communication loss.

What is CVE-2020-6087?

The vulnerability allows an attacker to disrupt communications with the device by sending a malicious packet, requiring a physical power cycle to restore functionality.

The Impact of CVE-2020-6087

CVSS Base Score: 7.5 (High)
Attack Vector: Network
Availability Impact: High
Attack Complexity: Low
Privileges Required: None
Scope: Unchanged

Technical Details of CVE-2020-6087

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The flaw arises in the ENIP Request Path Data Segment of Allen-Bradley Flex IO 1794-AENT/B, where a specially crafted network request can disrupt communication, necessitating a power cycle for recovery.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability is triggered by a malicious network packet that causes the device to enter a fault state, resulting in a loss of communication.

Mitigation and Prevention

To address CVE-2020-6087, follow these mitigation strategies:

Immediate Steps to Take

Implement network segmentation to limit access to vulnerable devices.
Regularly monitor network traffic for any suspicious activity.
Apply vendor-supplied patches or updates promptly.

Long-Term Security Practices

Conduct regular security assessments and penetration testing.
Educate users and administrators on best security practices.

Patching and Updates

Stay informed about security advisories from the vendor.
Apply patches and updates as soon as they are released to mitigate the vulnerability.