CVE-2023-22633 : Security Advisory and Response

This CVE-2023-22633 involves an improper permissions, privileges, and access controls vulnerability in FortiNAC-F 7.2.0, FortiNAC 9.4.1 and below, 9.2.6 and below, 9.1.8 and below, 8.8.0 all versions, and 8.7.0 all versions. It may allow an unauthenticated attacker to execute a denial-of-service (DoS) attack on the device via client-secure renegotiation.

Understanding CVE-2023-22633

This section delves into the details of CVE-2023-22633, discussing the vulnerability's nature and its potential impact.

What is CVE-2023-22633?

CVE-2023-22633 is an improper permissions, privileges, and access controls vulnerability found in various versions of FortiNAC products. This vulnerability could be exploited by an unauthenticated attacker to launch a DoS attack on the device through client-secure renegotiation.

The Impact of CVE-2023-22633

The impact of this vulnerability is rated as high, with a CVSS v3.1 base score of 7.2. The attack complexity is low, targeting the network with high availability impact, leading to a denial of service scenario.

Technical Details of CVE-2023-22633

In this section, we explore the technical aspects of CVE-2023-22633, including the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability is categorized under CWE-264 (Denial of Service) and arises from improper permissions, privileges, and access controls in the affected FortiNAC versions.

Affected Systems and Versions

FortiNAC-F 7.2.0, FortiNAC 9.4.1 and below, 9.2.6 and below, 9.1.8 and below, 8.8.0 all versions, and 8.7.0 all versions are impacted by this vulnerability.

Exploitation Mechanism

An unauthenticated attacker can exploit this vulnerability by leveraging client-secure renegotiation to carry out a DoS attack on the targeted device.

Mitigation and Prevention

This section outlines the necessary steps to mitigate and prevent exploitation of CVE-2023-22633.

Immediate Steps to Take

Users are advised to upgrade to the following versions to address the vulnerability:

FortiNAC-F version 7.2.1 or above
FortiNAC version 9.4.2 or above
FortiNAC version 9.2.7 or above
FortiNAC version 9.1.9 or above

Long-Term Security Practices

Implementing robust access control measures, regular security assessments, and staying informed about security updates can enhance the long-term security posture of the system.

Patching and Updates

Regularly applying security patches and updates provided by the vendor, Fortinet, is crucial to stay protected against known vulnerabilities like CVE-2023-22633.

By following these guidelines, users can secure their systems and mitigate the risks associated with CVE-2023-22633.