web-auth/webauthn-lib is an open source set of PHP libraries and a Symfony bundle to allow developers to integrate that authentication mechanism into their web applications. The ProfileBasedRequestOptionsBuilder method returns allowedCredentials without any credentials if no username was found. When WebAuthn is used as the first or only authentication method, an attacker can enumerate usernames based on the absence of the `allowedCredentials` property in the assertion options response. This allows enumeration of valid or invalid usernames. By knowing which usernames are valid, attackers can focus their efforts on a smaller set of potential targets, increasing the efficiency and likelihood of successful attacks. This issue has been addressed in version 4.9.0 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
References
Configurations
No configuration.
History
16 Jul 2024, 13:43
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Summary |
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15 Jul 2024, 20:15
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New CVE |
Information
Published : 2024-07-15 20:15
Updated : 2024-07-16 13:43
NVD link : CVE-2024-39912
Mitre link : CVE-2024-39912
CVE.ORG link : CVE-2024-39912
JSON object : View
Products Affected
No product.
CWE
CWE-204
Observable Response Discrepancy