Fortinet Takes Action: Patching a Critical RCE Vulnerability in FortiNAC

Vulnerabilities in Fortinet‘s FortiNAC Network Access Control Solution

Fortinet, a leading provider of network security solutions, has recently released patches to address a critical vulnerability in its FortiNAC network access control solution. The vulnerability, tracked as CVE-2023-33299, is described as an issue related to the deserialization of untrusted data that can lead to remote code execution (RCE) without authentication.

The Impact and Scope of the Vulnerability

The critical flaw in FortiNAC can be exploited by an unauthenticated attacker to execute unauthorized code or commands via specifically crafted requests to the TCP/1050 service. This vulnerability affects FortiNAC versions up to 7.2.1, up to 9.4.2, up to 9.2.7, and up to 9.1.9, as well as all 8.x iterations.

It’s important to note that Fortinet has addressed this security defect with the release of FortiNAC versions 9.4.3, 9.2.8, 9.1.10, and 7.2.2, but will not release patches for FortiNAC 8.x.

Additional Vulnerabilities and their Implications

Alongside the critical RCE vulnerability, Fortinet also patched a medium-severity vulnerability (CVE-2023-33300) in FortiNAC related to command injection via the TCP/5555 service. This vulnerability could allow an unauthenticated attacker to copy local files of the device to other local directories of the device by exploiting specially crafted input fields. However, access to the copied data is only possible if the attacker already has an existing foothold and sufficient privileges on the device. Fortinet has resolved this vulnerability with the release of FortiNAC versions 9.4.4 and 7.2.2.

The Importance of Patching

While there have been no reports of these vulnerabilities being exploited in attacks, it is crucial for organizations using FortiNAC to promptly apply the available patches. Cybersecurity threats are constantly evolving, and even a single unpatched vulnerability can expose organizations to significant risks. Patching remains one of the most effective ways to mitigate these risks and protect sensitive data.

Internet Security Considerations

It is worth noting that exposing TCP port 1050, which is used by FortiNAC, to the public internet is uncommon. Nevertheless, organizations should always be vigilant and ensure that all network services, especially those that are essential for security and control, are properly secured and protected. This includes reviewing network configurations, implementing strong firewalls, and employing best practices for network security.

Editorial: The Importance of Timely Patching and Vigilance

This recent Fortinet vulnerability highlights the ongoing challenges that organizations face in maintaining strong cybersecurity postures. Despite the efforts of software vendors to release timely patches, organizations often struggle to stay up to date due to the complexity and scale of their IT infrastructure. However, the consequences of ignoring or delaying critical patching are severe.

As the threat landscape becomes increasingly sophisticated and the potential impact of cyberattacks grows, it is paramount for organizations to prioritize timely patching. This requires dedicated resources and a proactive approach to vulnerability management. Regularly reviewing and updating security measures, including patching vulnerable software, is not only a responsibility but a necessary commitment to safeguarding sensitive information and maintaining trust with customers, partners, and stakeholders.

Advice for Organizations and Individuals

Here are some key recommendations for organizations and individuals to protect against vulnerabilities like those found in FortiNAC:

1. Stay Informed:

Monitor security advisories and updates from software vendors, security communities, and trusted sources to stay informed about the latest vulnerabilities and their associated patches.

2. Implement a Patch Management Process:

Establish a robust patch management process that includes regular vulnerability assessments, risk prioritization, and a systematic approach to deploying patches across all relevant systems and network devices.

3. Maintain a Strong Security Posture:

Adopt a defense-in-depth strategy that combines multiple layers of security controls, including firewalls, intrusion detection systems, and endpoint protection, to minimize the risk of exploitation.

4. Keep Software and Firmware Up to Date:

Regularly update software, firmware, and operating systems to ensure that known vulnerabilities are addressed. This includes applying patches not only to critical systems but also to less security-sensitive devices.

5. Limit Network Exposures:

Minimize network exposures by disabling unnecessary services, limiting access to critical systems, and applying strong access controls and authentication mechanisms.

6. Partner with Trustworthy Vendors:

Choose technology partners and vendors who prioritize security and regularly release timely patches and updates to address vulnerabilities.

7. Educate and Train Employees:

Ensure that employees are aware of security best practices, such as being cautious with emails, avoiding suspicious websites, and promptly reporting any potential security incidents or vulnerabilities.

By following these best practices and implementing a comprehensive security strategy, organizations and individuals can strengthen their defenses against vulnerabilities and reduce the risk of falling victim to cyberattacks.