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Fencer Vulns
medium 4.8

CVE-2023-45669 json

Improper signature counter value handling in webauthn4j-spring-security

published 2023-10-16 3 y ago modified 2026-09-10 1 mo ago also GHSA-v9hx-v6vf-g36j , EUVD-2023-2816

cvss
4.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven com.webauthn4j:webauthn4j-spring-security-core 0.9.1.RELEASE
  • webauthn4j spring_security 0.9.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-45669 updated cvss 4.3

webauthn4j: improper signature counter value handling

  • Red Hat Build of Keycloak org.keycloak-keycloak-parent org.keycloak-keycloak-parent Red Hat JBoss Enterprise Application Platform 6 keycloak-adapter-sso7_4-eap6 keycloak-adapter-sso7_4-eap6, keycloak-adapter-sso7_5-eap6 keycloak-adapter-sso7_5-eap6, org.keycloak-keycloak-parent org.keycloak-keycloak-parent Red Hat JBoss Enterprise Application Platform 8 org.keycloak-keycloak-parent org.keycloak-keycloak-parent Red Hat Single Sign-On 7 com.webauthn4j-webauthn4j com.webauthn4j-webauthn4j, org.keycloak-keycloak-parent org.keycloak-keycloak-parent
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
GitHub 3.1 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven com.webauthn4j:webauthn4j-spring-security-core
<0.9.1.RELEASE
0.9.1.RELEASE

Affected products

  • webauthn4j webauthn4j-spring-security

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.