Observation of Data to Infer Information Affecting web-auth/webauthn-symfony-bundle package, versions >=4.5.0, <4.9.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-WEBAUTHWEBAUTHNSYMFONYBUNDLE-7453169
- published16 Jul 2024
- disclosed15 Jul 2024
- creditMarc Riemer
Introduced: 15 Jul 2024
CVE-2024-39912 (opens in a new tab)How to fix?
Upgrade web-auth/webauthn-symfony-bundle to version 4.9.0 or higher.
Overview
web-auth/webauthn-symfony-bundle is a FIDO2/Webauthn Security Bundle For Symfony.
Affected versions of this package are vulnerable to Observation of Data to Infer Information via the ProfileBasedRequestOptionsBuilder method which returns allowedCredentials without any credentials if no username was found. An attacker can determine the validity of usernames based on the absence of the allowedCredentials property in the assertion options response.
PoC
curl https://example.com/assertion/options
-H 'content-type: application/json'
--data-raw '{"username":"NotMeRandomUsername123"}'