CVE-2023-45669
low-risk
Published 2023-10-16
WebAuthn4J Spring Security provides Web Authentication specification support for Spring applications. Affected versions are subject to improper signature counter value handling. A flaw was found in webauthn4j-spring-security-core. When an authneticator returns an incremented signature counter value during authentication, webauthn4j-spring-security-core does not properly persist the value, which means cloned authenticator detection does not work. An attacker who cloned valid authenticator in some way can use the cloned authenticator without being detected. This issue has been addressed in version `0.9.1.RELEASE`. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Do I need to act?
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0.40% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.8/10
Medium
NETWORK
/ HIGH complexity
Affected Products (1)
Spring Security
Affected Vendors
References (6)
Technical Description
https://www.w3.org/TR/2021/REC-webauthn-2-20210408/#sctn-sign-counter
Technical Description
https://www.w3.org/TR/2021/REC-webauthn-2-20210408/#sctn-sign-counter
22
/ 100
low-risk
Severity
15/34 · Moderate
Exploitability
2/34 · Minimal
Exposure
5/34 · Minimal