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. Prior to 5.2.4, when allowed_origins is configured, CheckAllowedOrigins reduces URL-like values to their host component and accepts on host match alone. This makes exact origin policies impossible to express: scheme and port differences are silently ignored.
This vulnerability is fixed in 5.2.4.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 3
https://github.com/web-auth/webauthn-framework/commit/535cc3c2dcbd9c3dfd5e00a25…
security-advisories@github.com
https://github.com/web-auth/webauthn-framework/commit/b4cd9a4394c35fcac6080fd2f…
security-advisories@github.com
https://github.com/web-auth/webauthn-framework/security/advisories/GHSA-f7pm-6h…
security-advisories@github.com