Horizon Alert
Summary of the vulnerability and why it matters
This vulnerability in the Webauthn Framework, identified as CVE-2021-38299, involves incorrect access control that could allow an attacker to bypass user presence checks when using a FIDO2 authenticator. This could potentially enable unauthorized access to systems that rely on this framework for authentication. The main concern is confirming relevance and exposure for any services utilizing this specific software.
- Bypass authentication checks without user interaction.
- Potential unauthorized access to authenticated services.
- Confirm if your systems use this authentication software.
Attack Path
How an attacker could exploit the issue
An attacker who compromises a user's system can bypass security checks when logging into a vulnerable service. By using a connected FIDO2 authenticator, they can authenticate without the required user presence verification. This vulnerability could potentially allow unauthorized access to sensitive information or system functions.
- Attacker controls user's system.
- FIDO2 authenticator used for login.
- Risk of unauthorized access and data compromise.
Live Threat
Current exploitation, exposure, and threat context
Incorrect access control in the Webauthn Framework could allow an attacker with control of a user's system to bypass user presence checks when logging in using a FIDO2 authenticator. This could affect services that rely on the framework for authentication, potentially leading to unauthorized access.
- User accounts and sessions at risk.
- Bypasses user presence checks.
- Unauthorized access to services.
Operational Fix
Recommended remediation, mitigation, and detection steps
In real-world scenarios, application owners are likely responsible for addressing this vulnerability within the Webauthn Framework, as it directly impacts authentication. The first practical step involves identifying all instances of the affected technology, assessing their exposure and business criticality, and then confirming the accountable owner for remediation planning.
- Application owners should manage this issue.
- Verify reachability and business criticality first.
- Plan remediation based on identified risk.
