CVE-2021-41017 : Vulnerability Insights and Analysis

Multiple heap-based buffer overflow vulnerabilities in Fortinet FortiWeb 6.4.1, 6.4.0, and 6.3.0 through 6.3.15 may allow remote attackers to execute arbitrary code or commands.

Understanding CVE-2021-41017

What is CVE-2021-41017?

The CVE-2021-41017 vulnerability involves heap-based buffer overflow flaws in certain web API controllers of FortiWeb versions, enabling remote authenticated attackers to execute malicious code or commands through crafted HTTP requests.

The Impact of CVE-2021-41017

The vulnerability has a CVSS base score of 8.1 (High severity) with significant impacts on confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2021-41017

Vulnerability Description

Multiple heap-based buffer overflow vulnerabilities in web API controllers of FortiWeb versions
Attackers can trigger the flaw using specially crafted HTTP requests

Affected Systems and Versions

Product: Fortinet FortiWeb
Versions Affected: FortiWeb 6.4.1, 6.4.0, 6.3.0 through 6.3.15

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: Low
User Interaction: None

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-provided patches immediately
Implement network controls to restrict access
Monitor for any unauthorized access attempts

Long-Term Security Practices

Regularly update and patch all software and systems
Conduct security assessments and audits periodically

Patching and Updates

Fortinet has not released a patch at the time of writing this report.