CVE-2020-5543 : Security Advisory and Response

Mitsubishi Electric MELQIC IU1 series IU1-1M20-D firmware version 1.0.7 and earlier is vulnerable to a session management issue that could be exploited by remote attackers.

Understanding CVE-2020-5543

This CVE involves a TCP function within the firmware of Mitsubishi Electric MELQIC IU1 series IU1-1M20-D, leading to potential network disruption or malware execution.

What is CVE-2020-5543?

The vulnerability in the TCP function of the affected firmware allows attackers to disrupt network operations or inject malware by sending a specially crafted packet.

The Impact of CVE-2020-5543

The security flaw enables remote threat actors to exploit the session management weakness, potentially causing network downtime or unauthorized code execution.

Technical Details of CVE-2020-5543

The technical aspects of this CVE are as follows:

Vulnerability Description

The TCP function in Mitsubishi Electric MELQIC IU1 series IU1-1M20-D firmware version 1.0.7 and earlier fails to manage sessions effectively, opening the door for malicious activities.

Affected Systems and Versions

Product: Mitsubishi Electric MELQIC IU1 series
Vendor: Mitsubishi Electric Corporation
Versions Affected: IU1-1M20-D firmware version 1.0.7 and earlier

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specially crafted packet to the affected device, taking advantage of the inadequate session management.

Mitigation and Prevention

To address CVE-2020-5543, consider the following mitigation strategies:

Immediate Steps to Take

Apply patches or updates provided by Mitsubishi Electric Corporation promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update firmware and software to ensure the latest security fixes are in place.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security advisories from Mitsubishi Electric Corporation and apply patches as soon as they are released to mitigate the risk of exploitation.