CVE-2023-26588 : Security Advisory and Response

This CVE record was published on April 11, 2023, by JPCERT, highlighting a vulnerability related to the use of hard-coded credentials in Buffalo network devices. This vulnerability could allow an attacker to access the debug function of the affected products.

Understanding CVE-2023-26588

This section provides insights into the nature and impact of CVE-2023-26588.

What is CVE-2023-26588?

CVE-2023-26588 is a vulnerability that stems from the use of hard-coded credentials in Buffalo network devices. Specifically, this flaw enables unauthorized access to the debug function of the product, potentially leading to security breaches and unauthorized activities.

The Impact of CVE-2023-26588

The impact of CVE-2023-26588 is significant as it exposes Buffalo network devices to exploitation by malicious actors. With access to the debug function through hard-coded credentials, attackers can compromise the security and integrity of the affected devices, leading to potential data breaches and unauthorized control.

Technical Details of CVE-2023-26588

Delving into the technical aspects of CVE-2023-26588, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in Buffalo network devices arises from the presence of hard-coded credentials, allowing attackers to bypass authentication mechanisms and gain unauthorized access to the debug function.

Affected Systems and Versions

The following Buffalo INC. products and versions are affected by CVE-2023-26588:

BS-GSL2024 firmware Ver. 1.10-0.03 and earlier
BS-GSL2016P firmware Ver. 1.10-0.03 and earlier
BS-GSL2016 firmware Ver. 1.10-0.03 and earlier
BS-GS2008 firmware Ver. 1.0.10.01 and earlier
BS-GS2016 firmware Ver. 1.0.10.01 and earlier
BS-GS2024 firmware Ver. 1.0.10.01 and earlier
BS-GS2048 firmware Ver. 1.0.10.01 and earlier
BS-GS2008P firmware Ver. 1.0.10.01 and earlier
BS-GS2016P firmware Ver. 1.0.10.01 and earlier
BS-GS2024P firmware Ver. 1.0.10.01 and earlier

Exploitation Mechanism

Exploiting the vulnerability involves leveraging the hard-coded credentials within the Buffalo network devices to gain unauthorized access to the debug function, thereby circumventing security controls and potentially compromising the devices.

Mitigation and Prevention

Outlined below are key steps to mitigate the risks associated with CVE-2023-26588 and prevent potential unauthorized access and security breaches.

Immediate Steps to Take

Disable unnecessary services or functionalities that may expose the debug function.
Regularly monitor device logs for any suspicious activities or unauthorized access attempts.
Apply security updates or patches provided by Buffalo INC. to address the vulnerability.

Long-Term Security Practices

Implement strong and unique passwords for all accounts and services on Buffalo network devices.
Conduct regular security audits and assessments to identify and remediate potential vulnerabilities.
Educate users and administrators about secure practices and the importance of maintaining strong passwords.

Patching and Updates

Buffalo INC. is likely to release patches or firmware updates to address the CVE-2023-26588 vulnerability. It is crucial for users of the affected devices to promptly apply these updates to mitigate the risk of exploitation and enhance the security of their network infrastructure.