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CVE-2019-11235 : What You Need to Know

Learn about CVE-2019-11235, a critical vulnerability in FreeRADIUS versions prior to 3.0.19. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.

FreeRADIUS versions prior to 3.0.19 have a flaw in handling the protection mechanism that checks if the received scalar is within a range and if the received group element is a valid point on the used curve. This vulnerability is similar to the Dragonblood issue, also present in CVE-2019-9498 and CVE-2019-9499.

Understanding CVE-2019-11235

FreeRADIUS before version 3.0.19 mishandles a protection mechanism, leading to a vulnerability similar to the Dragonblood issue.

What is CVE-2019-11235?

        FreeRADIUS versions prior to 3.0.19 have a flaw in handling the protection mechanism
        The vulnerability is related to checking the validity of received scalar and group elements
        Similar to the Dragonblood issue and CVE-2019-9498, CVE-2019-9499

The Impact of CVE-2019-11235

        Attackers could exploit this vulnerability to compromise the security of FreeRADIUS installations
        Unauthorized access to sensitive information and potential system control

Technical Details of CVE-2019-11235

FreeRADIUS before version 3.0.19 has a critical vulnerability that can be exploited by attackers.

Vulnerability Description

        Mishandles the protection mechanism related to scalar and group element validation

Affected Systems and Versions

        FreeRADIUS versions prior to 3.0.19

Exploitation Mechanism

        Attackers can exploit the flaw to compromise the security of FreeRADIUS installations

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2019-11235.

Immediate Steps to Take

        Update FreeRADIUS to version 3.0.19 or newer to patch the vulnerability
        Monitor network traffic for any suspicious activity
        Implement strong access controls and authentication mechanisms

Long-Term Security Practices

        Regularly update and patch software to prevent known vulnerabilities
        Conduct security audits and assessments to identify and address potential weaknesses

Patching and Updates

        Stay informed about security advisories and updates from FreeRADIUS
        Apply patches promptly to ensure the security of FreeRADIUS installations

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