CVE-2021-26099 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-26099, a vulnerability in Fortinet FortiMail before 7.0.0, allowing attackers to compromise encrypted master keys. Learn how to mitigate this security risk.
This CVE-2021-26099 article provides details about a vulnerability in Fortinet FortiMail before version 7.0.0, which could lead to the compromise of encrypted master keys and confidentiality.
Understanding CVE-2021-26099
CVE-2021-26099 is a vulnerability in Fortinet FortiMail that arises from missing cryptographic steps in the Identity-Based Encryption service, allowing attackers to compromise confidentiality.
What is CVE-2021-26099?
The vulnerability in FortiMail before 7.0.0 enables an attacker in possession of encrypted master keys to compromise confidentiality by observing specific properties of the ciphertext.
The Impact of CVE-2021-26099
With a CVSS base score of 4.4 (Medium severity), this vulnerability has a high attack complexity and requires high privileges. While it does not impact availability or integrity, the risk to confidentiality is significant.
Technical Details of CVE-2021-26099
This section delves into the specifics of the vulnerability.
Vulnerability Description
The flaw in Fortinet FortiMail allows attackers to exploit the missing cryptographic steps in the Identity-Based Encryption service, compromising the confidentiality of encrypted master keys.
Affected Systems and Versions
Fortinet FortiMail versions before 7.0.0 are impacted by this vulnerability.
Exploitation Mechanism
Attackers who obtain encrypted master keys can compromise confidentiality by analyzing invariant properties of the ciphertext.
Mitigation and Prevention
Protecting systems from CVE-2021-26099 is crucial to prevent potential breaches.
Immediate Steps to Take
Users should update Fortinet FortiMail to version 7.0.0 or higher to mitigate the vulnerability and enhance security.
Long-Term Security Practices
Implementing robust encryption protocols and regular security updates can bolster defenses against similar vulnerabilities.
Patching and Updates
Stay informed about security patches and updates released by Fortinet to address vulnerabilities like CVE-2021-26099.