CVE-2020-35509

MEDIUM5.4EPSS 0.09%

Keycloak vulnerable to Improper Certificate Validation

Published: 8/24/2022Modified: 6/30/2025

Description

keycloak accepts an expired certificate by the direct-grant authenticator because of missing time stamp validations. The highest threat from this vulnerability is to data confidentiality and integrity. This issue was partially fixed in version [13.0.1](https://github.com/keycloak/keycloak/pull/6330) and more completely fixed in version [14.0.0](https://github.com/keycloak/keycloak/pull/8067).

Affected packages (1)

Maven/org.keycloak:keycloak-corefrom 0, < 14.0.0

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References (8)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-35509
PATCHhttps://github.com/keycloak/keycloak
WEBhttps://access.redhat.com/security/cve/cve-2020-35509
WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=1912427
WEBhttps://github.com/keycloak/keycloak/blob/4f330f4a57cbfcf6202b60546518261c66e59a35/services/src/main/java/org/keycloak/authentication/authenticators/x509/ValidateX509CertificateUsername.java#L74-L76
WEBhttps://github.com/keycloak/keycloak/commit/478319348bdfdb9b6d39122f41edf2af79f679bb
WEBhttps://github.com/keycloak/keycloak/pull/6330
WEBhttps://github.com/keycloak/keycloak/pull/8067