[ASA-202106-19] keycloak: incorrect calculation

[Jonas Witschel]

Arch Linux Security Advisory ASA-202106-19
==========================================

Severity: Low
Date    : 2021-06-01
CVE-ID  : CVE-2021-3461
Package : keycloak
Type    : incorrect calculation
Remote  : Yes
Link    : https://security.archlinux.org/AVG-1994

Summary
=======

The package keycloak before version 13.0.1-1 is vulnerable to incorrect
calculation.

Resolution
==========

Upgrade to 13.0.1-1.

# pacman -Syu "keycloak>=13.0.1-1"

The problem has been fixed upstream in version 13.0.1.

Workaround
==========

None.

Description
===========

Keycloak may fail to logout a user session if the logout request comes
from an external SAML identity provider that is set up to identify the
principal via attributes rather than by Subject Name ID.

Impact
======

A remote attacker could take over a logged out user session if they
manage to obtain the old session token.

References
==========

https://bugzilla.redhat.com/show_bug.cgi?id=1941565
https://issues.redhat.com/browse/KEYCLOAK-17495
https://github.com/keycloak/keycloak/commit/f014299e7c781dff2b492b81bc81adcf717bd530
https://security.archlinux.org/CVE-2021-3461
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