CVE-2021-36179 : Exploit Details and Defense Strategies

A stack-based buffer overflow vulnerability in Fortinet FortiWeb versions allows attackers to execute unauthorized code or commands through crafted parameters.

Understanding CVE-2021-36179

This CVE involves a stack-based buffer overflow in Fortinet FortiWeb, enabling attackers to execute unauthorized code or commands via CLI command execution.

What is CVE-2021-36179?

CVE-2021-36179 is a high-severity vulnerability in Fortinet FortiWeb that allows attackers to exploit crafted parameters, leading to unauthorized code execution.

The Impact of CVE-2021-36179

The impact of this vulnerability is rated as high severity with a CVSS base score of 7.8. It can result in confidentiality, integrity, and availability impacts.

Technical Details of CVE-2021-36179

This section provides more insight into the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability involves a stack-based buffer overflow that affects specific versions of Fortinet FortiWeb, allowing attackers to run unauthorized code or commands.

Affected Systems and Versions

Fortinet FortiWeb versions 6.3.14 and below, as well as 6.2.4 and below, are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting crafted parameters in the CLI command execution, leading to the execution of unauthorized code or commands.

Mitigation and Prevention

To address CVE-2021-36179, it is crucial to take immediate steps and adopt long-term security practices.

Immediate Steps to Take

Update Fortinet FortiWeb to a patched version that addresses the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Implement regular security updates and patches for all software components.
Conduct security training to educate users about the risks of executing unauthorized commands.

Patching and Updates

Ensure that all systems running Fortinet FortiWeb are regularly updated with the latest patches to mitigate the risk of exploitation.