Description

An unconstrained memory consumption vulnerability was discovered in Keycloak. It can be triggered in environments which have millions of offline tokens (> 500,000 users with each having at least 2 saved sessions). If an attacker creates two or more user sessions and then open the "consents" tab of the admin User Interface, the UI attempts to load a huge number of offline client sessions leading to excessive memory and CPU consumption which could potentially crash the entire system.

Remediation

References

https://access.redhat.com/security/cve/CVE-2023-6563

https://bugzilla.redhat.com/show_bug.cgi?id=2253308

https://github.com/keycloak/keycloak/issues/13340

https://access.redhat.com/errata/RHSA-2023:7854

https://access.redhat.com/errata/RHSA-2023:7855

https://access.redhat.com/errata/RHSA-2023:7856

https://access.redhat.com/errata/RHSA-2023:7857

https://access.redhat.com/errata/RHSA-2023:7858

Related Vulnerabilities

CVE-2014-0002 Vulnerability in maven package org.apache.camel:camel-core

CVE-2021-21696 Vulnerability in maven package org.jenkins-ci.main:jenkins-core

CVE-2010-2245 Vulnerability in maven package org.apache.wink:wink-server

CVE-2020-16013 Vulnerability in npm package electron

CVE-2018-6873 Vulnerability in npm package auth0-js

Severity

High

Classification

CWE-770 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Tags

Vendor Advisory Issue Tracking Exploit