CVE-2023-6563

highPriorität · verfolgen · 31EPSS 0.012 · 69. PerzentilDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.24% (69th) EPSS

CVSS 7.7 · high

Is it mine?

18 products

Prüfe deine Angriffsfläche

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · bewertet 2026-10-27

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.

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

7.7

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen

v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hprimary · NVD / NIST USAusnutzbarkeit 3.1 · Auswirkung 4

v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · secalert@redhat.com USAusnutzbarkeit 3.1 · Auswirkung 4

v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · OSV

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-770USprimärCWE-770US

betroffene Produkte (18)

Betroffene Produkte und Versionsbereiche.

Hitachi Ops Centeralle Versionencert_bundDEcpe:/a:hitachi:ops_center:-
Open Source Keycloakalle Versionencert_bundDEcpe:/a:keycloak:keycloak:-
Red Hat Enterprise Linuxalle Versionencert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat RHEL-8 based Middleware Containers< 7.6-38enisa_euvdEU
Red Hat RHEL-8 based Middleware Containers< 7.6.6-2enisa_euvdEU
Red Hat Red Hat Single Sign-On 7.6 for RHEL 7< 0:18.0.11-2.redhat_00003.1.el7ssoenisa_euvdEU
Red Hat Red Hat Single Sign-On 7.6 for RHEL 8< 0:18.0.11-2.redhat_00003.1.el8ssoenisa_euvdEU
Red Hat Red Hat Single Sign-On 7.6 for RHEL 9< 0:18.0.11-2.redhat_00003.1.el9ssoenisa_euvdEU
redhat keycloak< 21.0.0nvdUScpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*
redhat openshift container platform= 4.11nvdUScpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*
redhat openshift container platform= 4.12nvdUScpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*
redhat openshift container platform for ibm linuxone= 4.10nvdUScpe:2.3:a:redhat:openshift_container_platform_for_ibm_linuxone:*:*:*:*:*:*:*:*
redhat openshift container platform for ibm linuxone= 4.9nvdUScpe:2.3:a:redhat:openshift_container_platform_for_ibm_linuxone:*:*:*:*:*:*:*:*
redhat openshift container platform for power= 4.10nvdUScpe:2.3:a:redhat:openshift_container_platform_for_power:*:*:*:*:*:*:*:*
redhat openshift container platform for power= 4.9nvdUScpe:2.3:a:redhat:openshift_container_platform_for_power:*:*:*:*:*:*:*:*
redhat single sign-onalle VersionennvdUScpe:2.3:a:redhat:single_sign-on:*:*:*:*:*:*:*:*
redhat single sign-on= 7.6nvdUScpe:2.3:a:redhat:single_sign-on:*:*:*:*:*:*:*:*
Maven org.keycloak:keycloak-model-jpa< 21.0.0osvUSpkg:maven/org.keycloak/keycloak-model-jpa

Advisories (2)

Hersteller- und Ökosystem-Meldungen dazu.

WID-SEC-W-2023-3156Keycloak: Mehrere SchwachstellenDeutsch2023-12-14csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Keycloak ausnutzen, um Sicherheitsvorkehrungen zu umgehen oder einen Denial of Service zu verursachen.
GHSA-54f3-c6hg-865hAllocation of Resources Without Limits in Keycloak2023-12-14ghsa · osvUS
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.

auch bekannt als (3)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

veröffentlicht 2023-12-14geändert 2026-09-22

verwandt (3,268)

Verwandte Einträge.

ID	Schweregrad	EPSS	ausnutzbar	veröffentlicht
CVE-2025-53521US	—OT kritisch	2.30% (83rd)	KEV	2025-10-15
When a BIG-IP APM access policy is configured on a virtual server, specific malicious traffic can lead to Remote Code Execution (RCE). Note: Software versions which have reached…
CVE-2022-22963US	critical9.8OT kritisch	99.9% (100th)	KEV	2022-04-01
In Spring Cloud Function versions 3.1.6, 3.2.2 and older unsupported versions, when using routing functionality it is possible for a user to provide a specially crafted SpEL as a r…
CVE-2020-3569US	high8.6OT kritisch	3.32% (89th)	KEV	2020-09-23
Multiple vulnerabilities in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to either immedi…
CVE-2020-3566US	high8.6OT kritisch	3.70% (90th)	KEV	2020-08-29
A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory…
CVE-2023-50387US	high7.5	100.0% (100th)	Exploit	2024-02-14
Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more D…

+3263 weitere

Referenzen (27)

Externe Belege — Patches, Meldungen, Analysen.

scry

Angreifer nutzen Schwachstellen wie diese gegen im Internet exponierte Dienste aus. Sehen Sie mit einem kostenlosen Passiv-Scan, was exponiert ist.

Kostenloser Scan