CVE-2023-6563
Keycloak: offline session token dos
Severity Score
7.7
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
Se descubrió una vulnerabilidad de consumo de memoria sin restricciones en Keycloak. Se puede activar en entornos que tienen millones de tokens fuera de línea (> 500.000 usuarios, cada uno con al menos 2 sesiones guardadas). Si un atacante crea dos o más sesiones de usuario y luego abre la pestaña "consentimientos" de la interfaz de usuario del administrador, la interfaz de usuario intenta cargar una gran cantidad de sesiones de clientes fuera de línea, lo que genera un consumo excesivo de memoria y CPU, lo que potencialmente podría bloquear todo el sistema.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2023-12-06 CVE Reserved
- 2023-12-14 CVE Published
- 2023-12-28 EPSS Updated
- 2024-09-18 CVE Updated
- 2024-09-18 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-770: Allocation of Resources Without Limits or Throttling
CAPEC
References (8)
| URL | Tag | Source |
|---|---|---|
| https://github.com/keycloak/keycloak/issues/13340 | Issue Tracking |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2023:7857 | 2024-09-18 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2023:7854 | 2023-12-27 | |
| https://access.redhat.com/errata/RHSA-2023:7855 | 2023-12-27 | |
| https://access.redhat.com/errata/RHSA-2023:7856 | 2023-12-27 | |
| https://access.redhat.com/errata/RHSA-2023:7858 | 2023-12-27 | |
| https://access.redhat.com/security/cve/CVE-2023-6563 | 2023-12-14 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2253308 | 2023-12-14 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Redhat Search vendor "Redhat" | Single Sign-on Search vendor "Redhat" for product "Single Sign-on" | 7.6 Search vendor "Redhat" for product "Single Sign-on" and version "7.6" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Single Sign-on Search vendor "Redhat" for product "Single Sign-on" | 7.6 Search vendor "Redhat" for product "Single Sign-on" and version "7.6" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Single Sign-on Search vendor "Redhat" for product "Single Sign-on" | 7.6 Search vendor "Redhat" for product "Single Sign-on" and version "7.6" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 9.0 Search vendor "Redhat" for product "Enterprise Linux" and version "9.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Openshift Container Platform Search vendor "Redhat" for product "Openshift Container Platform" | 4.11 Search vendor "Redhat" for product "Openshift Container Platform" and version "4.11" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Openshift Container Platform Search vendor "Redhat" for product "Openshift Container Platform" | 4.12 Search vendor "Redhat" for product "Openshift Container Platform" and version "4.12" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Openshift Container Platform For Power Search vendor "Redhat" for product "Openshift Container Platform For Power" | 4.9 Search vendor "Redhat" for product "Openshift Container Platform For Power" and version "4.9" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Openshift Container Platform For Power Search vendor "Redhat" for product "Openshift Container Platform For Power" | 4.10 Search vendor "Redhat" for product "Openshift Container Platform For Power" and version "4.10" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Openshift Container Platform For Ibm Linuxone Search vendor "Redhat" for product "Openshift Container Platform For Ibm Linuxone" | 4.9 Search vendor "Redhat" for product "Openshift Container Platform For Ibm Linuxone" and version "4.9" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Openshift Container Platform For Ibm Linuxone Search vendor "Redhat" for product "Openshift Container Platform For Ibm Linuxone" | 4.10 Search vendor "Redhat" for product "Openshift Container Platform For Ibm Linuxone" and version "4.10" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Keycloak Search vendor "Redhat" for product "Keycloak" | < 21.0.0 Search vendor "Redhat" for product "Keycloak" and version " < 21.0.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Single Sign-on Search vendor "Redhat" for product "Single Sign-on" | - | text-only |
Affected
| ||||||