CVE-2021-38299 : Exploit Details and Defense Strategies

Webauthn Framework 3.3.x before 3.3.4 has Incorrect Access Control, allowing an attacker to log in to a vulnerable service without proper user presence verification.

Understanding CVE-2021-38299

This CVE involves a vulnerability in the Webauthn Framework version 3.3.x that exposes a security flaw, enabling unauthorized access.

What is CVE-2021-38299?

The CVE-2021-38299 vulnerability in Webauthn Framework versions before 3.3.4 permits attackers with control over a user's system to bypass user presence verification and access a service using a connected FIDO2 authenticator.

The Impact of CVE-2021-38299

This vulnerability poses a significant risk to the security of services utilizing Webauthn Framework 3.3.x, potentially leading to unauthorized access by malicious actors.

Technical Details of CVE-2021-38299

In-depth details regarding the vulnerability and its implications.

Vulnerability Description

The security flaw in Webauthn Framework version 3.3.x allows attackers controlling a user's system to gain unauthorized access to a service by leveraging an attached FIDO2 authenticator without the necessary user presence verification.

Affected Systems and Versions

Webauthn Framework versions 3.3.x before 3.3.4 are impacted by CVE-2021-38299, exposing services using this specific version range to exploitation.

Exploitation Mechanism

Attackers can exploit this vulnerability by taking advantage of the lack of proper user presence validation in the Webauthn Framework, potentially leading to unauthorized service access.

Mitigation and Prevention

Effective strategies to mitigate the risks associated with CVE-2021-38299.

Immediate Steps to Take

Service providers are advised to update their Webauthn Framework to version 3.3.4 or higher to address the Incorrect Access Control vulnerability and enhance security measures.

Long-Term Security Practices

Implementing robust access control mechanisms and regularly monitoring for any unauthorized activities can significantly reduce the likelihood of exploitation.

Patching and Updates

Regularly applying security patches and staying informed about the latest security developments in the Webauthn Framework ecosystem is crucial to maintaining a secure environment.