CVE-2021-41019 : Exploit Details and Defense Strategies
Learn about CVE-2021-41019 affecting Fortinet FortiOS versions below 6.4.7, enabling unauthorized access to sensitive information through improper certificate validation. Take immediate steps for security.
Inadequate validation of certificates in Fortinet FortiOS versions below 6.4.7 could lead to information disclosure via a malicious LDAP server.
Understanding CVE-2021-41019
A vulnerability in certificate validation in FortiOS enables data exposure via LDAP connections.
What is CVE-2021-41019?
The flaw in Fortinet FortiOS versions 6.4.6 and earlier could permit unauthorized access to sensitive information through LDAP connections initiated via GUI.
The Impact of CVE-2021-41019
The vulnerability exposes critical data, such as Active Directory credentials, by enabling connections to rogue LDAP servers through the GUI.
Technical Details of CVE-2021-41019
The vulnerability specifics of the Fortinet FortiOS security issue.
Vulnerability Description
- CWE-297: Improper validation of certificates with host mismatch
Affected Systems and Versions
- Fortinet FortiOS 6.4.6 and below
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Adjacent Network
- Privileges Required: None
- User Interaction: Required
Mitigation and Prevention
Actions to address and prevent CVE-2021-41019 exploitation.
Immediate Steps to Take
- Update affected FortiOS versions to 6.4.7 or higher
- Monitor LDAP connections for suspicious activity
Long-Term Security Practices
- Regular security training for staff
- Implement network segmentation to restrict access
Patching and Updates
- Follow Fortinet's security advisory for patch releases