CVE-2021-41015 : What You Need to Know

Fortinet FortiWeb versions 6.4.1 and below, 6.3.15 and below, are affected by a cross-site scripting vulnerability that allows attackers to execute unauthorized code or commands via crafted HTTP requests.

Understanding CVE-2021-41015

Fortinet FortiWeb is prone to an improper neutralization of input vulnerability that can lead to code execution.

What is CVE-2021-41015?

The vulnerability in Fortinet FortiWeb versions 6.4.1 and below, 6.3.15 and below, enables attackers to execute unauthorized code or commands through manipulated HTTP requests to the SAML login handler.

The Impact of CVE-2021-41015

This vulnerability has a CVSS base score of 5.8, categorizing it as medium severity. Attackers can exploit this flaw to execute unauthorized commands or code, risking low impact on confidentiality and integrity with required user interaction.

Technical Details of CVE-2021-41015

Fortinet FortiWeb version 6.4.1 and below, 6.3.15 and below, are susceptible to this cross-site scripting vulnerability.

Vulnerability Description

The vulnerability results from inadequate input neutralization during web page generation, allowing attackers to inject unauthorized code or commands.

Affected Systems and Versions

Product: Fortinet FortiWeb
Versions: 6.4.1, 6.4.0

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specifically crafted HTTP requests to the SAML login handler, triggering the execution of unauthorized commands or code.

Mitigation and Prevention

Implement the following steps to mitigate the CVE-2021-41015 vulnerability:

Immediate Steps to Take

Update Fortinet FortiWeb to a non-vulnerable version.
Monitor incoming HTTP requests for suspicious activities.
Implement strict input validation mechanisms.

Long-Term Security Practices

Regularly conduct security audits and code reviews.
Train personnel on identifying and responding to potential security threats.
Keep abreast of security advisories and patches from Fortinet.

Patching and Updates

Apply the latest patches and updates provided by Fortinet to address the vulnerability and enhance the security posture of Fortinet FortiWeb.