CVE-2021-22124 : Exploit Details and Defense Strategies

This CVE-2021-22124 involves an uncontrolled resource consumption vulnerability found in the login modules of Fortinet's FortiSandbox and FortiAuthenticator products. An attacker could exploit this flaw to render the device unresponsive, potentially leading to a denial of service situation.

Understanding CVE-2021-22124

This section will delve into the specifics of CVE-2021-22124, focusing on its impact, technical details, and mitigation strategies.

What is CVE-2021-22124?

The vulnerability in CVE-2021-22124 allows an unauthenticated attacker to overload the login modules of FortiSandbox 3.2.0 to 3.2.2, 3.1.0 to 3.1.4, and 3.0.0 to 3.0.6, as well as FortiAuthenticator before 6.0.6, using specially crafted lengthy request parameters.

The Impact of CVE-2021-22124

With a CVSS base score of 7.5, this vulnerability poses a high risk to affected systems. The attack vector is through the network, with a significant impact on availability. An attacker can trigger a denial of service by exploiting this flaw.

Technical Details of CVE-2021-22124

Let's explore the technical aspects of CVE-2021-22124, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability stems from uncontrolled resource consumption within the login modules of FortiSandbox and FortiAuthenticator due to handling long request parameters.

Affected Systems and Versions

FortiSandbox versions 3.0.0 to 3.2.2 and FortiAuthenticator before 6.0.6 are confirmed to be impacted by this vulnerability.

Exploitation Mechanism

By sending specifically crafted long request parameters, an unauthenticated attacker can trigger this vulnerability, causing the target device to become unresponsive.

Mitigation and Prevention

Discover the recommended steps to mitigate the risks associated with CVE-2021-22124 and enhance the security posture of your system.

Immediate Steps to Take

It is crucial to apply the latest security patches provided by Fortinet to address this vulnerability promptly. Additionally, limiting network access to vulnerable systems can reduce the attack surface.

Long-Term Security Practices

Implement network segmentation, access controls, and regular security updates to fortify the overall security of your network infrastructure.

Patching and Updates

Stay informed about security advisories from Fortinet and promptly apply patches to remediate vulnerabilities and protect your systems from potential threats.