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CVE-2023-49208 : Security Advisory and Response

Learn about CVE-2023-49208, a buffer overflow vulnerability in Glewlwyd SSO server before 2.7.6. Understand the impact, affected systems, and mitigation steps.

A buffer overflow vulnerability has been discovered in Glewlwyd SSO server before version 2.7.6, specifically in the scheme/webauthn.c file. This vulnerability could be exploited during FIDO2 credentials validation in webauthn registration.

Understanding CVE-2023-49208

This CVE refers to a potential buffer overflow issue in Glewlwyd SSO server before the 2.7.6 release.

What is CVE-2023-49208?

The vulnerability exists in the authentication process of FIDO2 credentials within webauthn registration, allowing attackers to potentially overflow the buffer.

The Impact of CVE-2023-49208

If exploited, this vulnerability could lead to unauthorized access to sensitive data, potential denial of service, or even remote code execution.

Technical Details of CVE-2023-49208

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The CVE-2023-49208 vulnerability stems from a lack of proper input validation during FIDO2 credentials validation, creating the potential for a buffer overflow.

Affected Systems and Versions

        Affected Vendor: N/A
        Affected Product: N/A
        Affected Version: N/A (All versions before 2.7.6)

Exploitation Mechanism

Attackers can craft malicious requests during the FIDO2 credentials validation process, triggering a buffer overflow and potentially gaining unauthorized access.

Mitigation and Prevention

To address CVE-2023-49208, immediate action and ongoing security measures are crucial.

Immediate Steps to Take

        Update Glewlwyd SSO server to version 2.7.6 or newer to mitigate the vulnerability.
        Monitor network traffic for any suspicious activities.

Long-Term Security Practices

        Implement regular security audits and code reviews to identify and address vulnerabilities promptly.
        Educate users and administrators on secure authentication practices.

Patching and Updates

Stay informed about security updates and patches released by Glewlwyd to address potential vulnerabilities in a timely manner.

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