CVE-2019-5593 : Security Advisory and Response

Fortinet FortiOS versions 6.2.0 to 6.2.1, 6.0.6, and below are vulnerable to an information disclosure issue that could allow a non-privileged user to access plaintext private keys of the system's local certificates.

Understanding CVE-2019-5593

This CVE involves improper permission or value checking in the CLI console, potentially leading to the exposure of sensitive information.

What is CVE-2019-5593?

CVE-2019-5593 is an information disclosure vulnerability in Fortinet FortiOS versions 6.2.0 to 6.2.1, 6.0.6, and older. It allows a non-privileged user to obtain plaintext private keys of the system's built-in local certificates by manipulating encryption passwords.

The Impact of CVE-2019-5593

The vulnerability could result in unauthorized access to sensitive information, compromising the security and confidentiality of the system's private keys.

Technical Details of CVE-2019-5593

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The issue arises from improper permission or value checking in the CLI console, enabling unauthorized access to plaintext private keys of local certificates.

Affected Systems and Versions

Fortinet FortiOS 6.2.0 to 6.2.1
Fortinet FortiOS 6.0.6 and below

Exploitation Mechanism

The vulnerability can be exploited by a non-privileged user through manipulation of encryption passwords in the CLI console, allowing access to private keys.

Mitigation and Prevention

Protecting systems from CVE-2019-5593 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly to address the vulnerability.
Implement proper access controls and permissions to restrict unauthorized access to sensitive information.

Long-Term Security Practices

Regularly monitor and audit system logs for any unauthorized access attempts.
Conduct security training for users to raise awareness about the importance of secure password practices.

Patching and Updates

Fortinet has released patches to mitigate the vulnerability. Ensure timely installation of these patches to secure the system against potential exploits.