CVE-2021-36188 : Security Advisory and Response

This article provides an overview of CVE-2021-36188, detailing the vulnerability found in Fortinet FortiWeb and its potential impact, along with mitigation strategies.

Understanding CVE-2021-36188

CVE-2021-36188 is a security vulnerability identified in Fortinet FortiWeb that could allow an attacker to execute unauthorized code or commands through crafted GET parameters.

What is CVE-2021-36188?

The vulnerability in Fortinet FortiWeb version 6.4.1 and below, as well as 6.3.15 and earlier, results from improper input neutralization during web page generation, enabling cross-site scripting attacks.

The Impact of CVE-2021-36188

With a base severity rating of 'Medium,' the vulnerability could be exploited by attackers to execute unauthorized code or commands, posing risks to the integrity and confidentiality of affected systems.

Technical Details of CVE-2021-36188

The following technical details shed light on the vulnerability and its implications.

Vulnerability Description

The vulnerability arises due to improper neutralization of input during web page generation in Fortinet FortiWeb, opening the door for 'cross-site scripting' attacks.

Affected Systems and Versions

Fortinet FortiWeb versions 6.4.1 and below, as well as 6.3.15 and earlier, are confirmed to be affected by this security issue.

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious code via crafted GET parameters in requests to login and error handlers.

Mitigation and Prevention

Protect your systems from CVE-2021-36188 with these mitigation strategies.

Immediate Steps to Take

Update Fortinet FortiWeb to a secure version that contains fixes for this vulnerability.
Monitor and restrict input parameters to minimize the risk of malicious exploitation.

Long-Term Security Practices

Regularly apply security patches and updates to Fortinet FortiWeb to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate potential weaknesses.

Patching and Updates

Stay informed about security advisories and updates provided by Fortinet to ensure timely patching of any identified vulnerabilities.