CVE-2021-22129 : Exploit Details and Defense Strategies

A detailed overview of CVE-2021-22129, a vulnerability found in Fortinet FortiMail before version 6.4.5 that could allow an attacker to trigger a buffer overflow through specifically crafted HTTP requests.

Understanding CVE-2021-22129

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-22129.

What is CVE-2021-22129?

CVE-2021-22129 describes multiple instances of incorrect buffer size calculation in the Webmail and Administrative interface of FortiMail before version 6.4.5. This could empower an authenticated attacker with regular webmail access to potentially execute unauthorized code or commands using specially designed HTTP requests.

The Impact of CVE-2021-22129

The vulnerability holds a CVSS base score of 8.8 (High severity) and affects confidentiality, integrity, and availability. With a low attack complexity and network-based attack vector, an attacker with minimal privileges could exploit the flaw to execute malicious code or commands.

Technical Details of CVE-2021-22129

Explore the specific aspects of the vulnerability.

Vulnerability Description

The vulnerability arises due to incorrect buffer size calculations in the FortiMail Webmail and Administrative interface, enabling a buffer overflow attack.

Affected Systems and Versions

Fortinet FortiMail versions prior to 6.4.5 are vulnerable to this exploit.

Exploitation Mechanism

An authenticated attacker with regular webmail access can trigger a buffer overflow by sending crafted HTTP requests, potentially leading to unauthorized code execution.

Mitigation and Prevention

Learn how to protect your system from CVE-2021-22129.

Immediate Steps to Take

Security measures to implement promptly post-discovery of the vulnerability.

Long-Term Security Practices

Best practices for enhancing overall system security and resilience.

Patching and Updates

Guidelines on applying relevant patches and updates to fortify system defenses.