Arch Linux: ASA-202106-19 Low Severity: Keycloak Session Takeover Risk

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://github.com/keycloak/keycloak/commit/f014299e7c781dff2b492b81bc81adcf717bd530
https://security.archlinux.org/CVE-2021-3461