CVE-2023-2061 Explained : Impact and Mitigation

This CVE involves an authentication bypass vulnerability found in Mitsubishi Electric Corporation's MELSEC iQ-R Series EtherNet/IP module RJ71EIP91 and MELSEC iQ-F Series EtherNet/IP module FX5-ENET/IP. The vulnerability allows a remote unauthenticated attacker to obtain a hard-coded password and gain access to the module via FTP.

Understanding CVE-2023-2061

This section delves into the details surrounding CVE-2023-2061, outlining its impact, technical aspects, and mitigation strategies.

What is CVE-2023-2061?

The CVE-2023-2061 vulnerability pertains to an authentication bypass issue associated with the FTP function on the mentioned Mitsubishi Electric Corporation modules. This flaw can enable an unauthorized attacker to extract a hard-coded password, subsequently leading to unauthorized access via FTP.

The Impact of CVE-2023-2061

The impact of this vulnerability is significant as it allows for an authentication bypass, presenting a critical security risk. Attackers can exploit this flaw remotely without the need for any prior authentication, potentially compromising sensitive information stored on the affected modules.

Technical Details of CVE-2023-2061

This section provides a more technical overview of the CVE, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The CVE-2023-2061 vulnerability involves the exploitation of a hard-coded password vulnerability within the FTP function of Mitsubishi Electric Corporation's MELSEC iQ-R Series EtherNet/IP module RJ71EIP91 and MELSEC iQ-F Series EtherNet/IP module FX5-ENET/IP.

Affected Systems and Versions

All versions of the MELSEC iQ-R Series EtherNet/IP module RJ71EIP91 and MELSEC iQ-F Series EtherNet/IP module FX5-ENET/IP are impacted by this vulnerability.

Exploitation Mechanism

Remote unauthenticated attackers can exploit this vulnerability to retrieve the hard-coded password and subsequently gain unauthorized access to the affected modules via FTP.

Mitigation and Prevention

In response to CVE-2023-2061, organizations and users are advised to take immediate action to mitigate the risks posed by this authentication bypass vulnerability. Implementing the following steps can help enhance the security posture and prevent potential exploitation.

Immediate Steps to Take

Disable external access to the affected modules where feasible.
Implement network segmentation to limit exposure to external threats.
Regularly monitor and audit FTP access to detect unauthorized activities.

Long-Term Security Practices

Regularly update firmware and apply security patches provided by Mitsubishi Electric Corporation.
Conduct regular security assessments and penetration testing to identify and address vulnerabilities proactively.
Enhance access controls and authentication mechanisms to prevent unauthorized access attempts.

Patching and Updates

Stay updated with security advisories from Mitsubishi Electric Corporation and promptly apply any patches or updates released to address the CVE-2023-2061 vulnerability. Regularly check for firmware updates and ensure the timely implementation of recommended security measures to safeguard against potential exploits.