CVE-2023-33305 : What You Need to Know

A loop with unreachable exit condition ('infinite loop') vulnerability in Fortinet products allows attackers to perform denial of service attacks via specially crafted HTTP requests.

Understanding CVE-2023-33305

This section provides an overview of the CVE-2023-33305 vulnerability affecting Fortinet products.

What is CVE-2023-33305?

The CVE-2023-33305 vulnerability is caused by an infinite loop issue in multiple versions of Fortinet products, including FortiWeb, FortiOS, and FortiProxy. Attackers can exploit this vulnerability to launch denial of service attacks by sending malicious HTTP requests.

The Impact of CVE-2023-33305

The impact of CVE-2023-33305 includes the ability for threat actors to disrupt services, overwhelm the target system, and potentially cause downtime for affected organizations.

Technical Details of CVE-2023-33305

In this section, we delve into the specifics of the CVE-2023-33305 vulnerability.

Vulnerability Description

The vulnerability exists in various versions of FortiWeb, FortiOS, and FortiProxy, allowing attackers to trigger an infinite loop and conduct denial of service attacks through crafted HTTP requests.

Affected Systems and Versions

Fortinet products affected by CVE-2023-33305 include FortiWeb versions 6.3.0 to 7.2.1, FortiOS versions 5.0.0 to 7.2.4, and FortiProxy versions 1.0.0 to 7.2.3.

Exploitation Mechanism

Cybercriminals can exploit this vulnerability by sending specially crafted HTTP requests to the affected Fortinet products, triggering an infinite loop that leads to denial of service.

Mitigation and Prevention

This section outlines essential steps to mitigate the CVE-2023-33305 vulnerability and secure affected systems.

Immediate Steps to Take

Users are advised to upgrade to the following versions to mitigate the CVE-2023-33305 vulnerability:

FortiPAM version 1.0.0 or above
FortiWeb version 7.2.2 or above
FortiWeb version 7.0.7 or above
FortiOS version 7.4.0 or above
FortiOS version 7.2.5 or above
FortiOS version 7.0.11 or above
FortiProxy version 7.2.4 or above
FortiProxy version 7.0.10 or above

Long-Term Security Practices

In addition to immediate patching, organizations should implement robust security measures, conduct regular security assessments, and educate employees on best cybersecurity practices.

Patching and Updates

Regularly update Fortinet products to the latest secure versions to defend against known vulnerabilities and ensure a resilient security posture.