CVE-2023-6563
Last modified
CVE-2023-6563 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. 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). EPSS estimates a 1.24% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Keycloak | < 21.0.0 |
| Redhat | Single Sign-On | 7.6 |
| Redhat | Single Sign-On | All versions |
| Redhat | Openshift Container Platform | 4.11 |
| Redhat | Openshift Container Platform | 4.12 |
| Redhat | Openshift Container Platform For Power | 4.9 |
| Redhat | Openshift Container Platform For Power | 4.10 |
| Redhat | Openshift Container Platform For Ibm Linuxone | 4.9 |
| Redhat | Openshift Container Platform For Ibm Linuxone | 4.10 |
References
- https://access.redhat.com/errata/RHSA-2023:7854Vendor Advisory
- https://access.redhat.com/errata/RHSA-2023:7855Vendor Advisory
- https://access.redhat.com/errata/RHSA-2023:7856Vendor Advisory
- https://access.redhat.com/errata/RHSA-2023:7858Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2023-6563Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2253308Issue Tracking
- https://github.com/keycloak/keycloak/issues/13340Issue Tracking
- https://access.redhat.com/errata/RHSA-2023:7854Vendor Advisory
- https://access.redhat.com/errata/RHSA-2023:7855Vendor Advisory
- https://access.redhat.com/errata/RHSA-2023:7856Vendor Advisory
- https://access.redhat.com/errata/RHSA-2023:7858Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2023-6563Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2253308Issue Tracking
- https://github.com/keycloak/keycloak/issues/13340Issue Tracking
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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