A keycloak security update has been released for Arch Linux.

ASA-202106-53: keycloak: certificate verification bypass

Arch Linux Security Advisory ASA-202106-53
=========================================
Severity: Medium
Date : 2021-06-22
CVE-ID : CVE-2020-35509
Package : keycloak
Type : certificate verification bypass
Remote : Yes
Link :   https://security.archlinux.org/AVG-2084

Summary
======
The package keycloak before version 14.0.0-1 is vulnerable to
certificate verification bypass.

Resolution
=========
Upgrade to 14.0.0-1.

# pacman -Syu "keycloak>.0.0-1"

The problem has been fixed upstream in version 14.0.0.

Workaround
=========
None.

Description
==========
A security issue has been found in Keycloak before version 14.0.0.
Depending on the webserver configuration, a malicious user can supply
an expired certificate and it would be accepted by Keycloak direct-
grant authenticator. This is because Keycloak does not trigger the
appropriate timestamp validation.

Impact
=====
A user could authenticate with an expired certificate.

References
=========
  https://bugzilla.redhat.com/show_bug.cgi?id12427
  https://issues.redhat.com/browse/KEYCLOAK-16450
  https://github.com/keycloak/keycloak/pull/8067
  https://github.com/keycloak/keycloak/commit/478319348bdfdb9b6d39122f41edf2af79f679bb
  https://security.archlinux.org/CVE-2020-35509