CVE-2020-6083 : Security Advisory and Response

An exploitable denial of service vulnerability exists in the ENIP Request Path Port 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. An attacker can send a malicious packet to trigger this vulnerability.

Understanding CVE-2020-6083

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

What is CVE-2020-6083?

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

The Impact of CVE-2020-6083

CVSS Base Score: 7.5 (High)
Attack Vector: Network
Attack Complexity: Low
Availability Impact: High
Privileges Required: None
Scope: Unchanged
Vector String: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE ID: CWE-120 (Buffer Copy without Checking Size of Input)

Technical Details of CVE-2020-6083

This section provides more in-depth technical information about the vulnerability.

Vulnerability Description

The vulnerability is due to a flaw in the ENIP Request Path Port Segment functionality of the affected device, allowing for a denial of service through a specially crafted network request.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability can be exploited by sending a malicious packet to the device, triggering the denial-of-service condition.

Mitigation and Prevention

Protecting systems from CVE-2020-6083 requires immediate action and long-term security practices.

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly.
Implement network segmentation to limit exposure.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Conduct security assessments and penetration testing.
Educate users on safe network practices.

Patching and Updates

Ensure that the affected device is updated with the latest patches and security updates.