CVE-2020-5657 : Vulnerability Insights and Analysis

A vulnerability in the TCP/IP function of Mitsubishi Electric Corporation's MELSEC iQ-R series allows unauthenticated attackers to disrupt network functions.

Understanding CVE-2020-5657

This CVE involves an 'Argument Injection' vulnerability affecting specific modules of the MELSEC iQ-R series.

What is CVE-2020-5657?

The vulnerability arises from improper neutralization of argument delimiters in a command, enabling attackers on the adjacent network to halt product functions using a crafted packet.

The Impact of CVE-2020-5657

The vulnerability poses a risk of network disruption and potential exploitation by malicious actors.

Technical Details of CVE-2020-5657

This section delves into the technical aspects of the CVE.

Vulnerability Description

The flaw allows unauthenticated attackers to disrupt network functions through specially crafted packets.

Affected Systems and Versions

Product: MELSEC iQ-R series
Affected Versions: RJ71EIP91, RJ71PN92, RD81DL96, RD81MES96N, RD81OPC96

Exploitation Mechanism

Attackers exploit the vulnerability by sending malicious packets to the affected modules.

Mitigation and Prevention

Protecting systems from CVE-2020-5657 is crucial for maintaining network security.

Immediate Steps to Take

Apply vendor-provided patches promptly.
Implement network segmentation to limit exposure.
Monitor network traffic for suspicious activities.

Long-Term Security Practices

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

Patching and Updates

Regularly check for security updates and patches from Mitsubishi Electric Corporation to address the vulnerability.