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CVE-2020-35509

Good to know:

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Date: August 23, 2022

A flaw was found in keycloak affecting versions 11.0.3 and 12.0.0. An expired certificate would be accepted by the direct-grant authenticator because of missing time stamp validations. The highest threat from this vulnerability is to data confidentiality and integrity.

Language: Java

Severity Score

Related Resources (9)

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

Severity Score

Weakness Type (CWE)

Improper Certificate Validation

CWE-295

Input Validation

CWE-20

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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