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.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
Affected products
- RedHat / keycloak21.0.0
- RedHat / openshift_container_platform4.12 – 4.12
- RedHat / openshift_container_platform4.11 – 4.11
- RedHat / openshift_container_platform_for_ibm_linuxone4.10 – 4.10
- RedHat / openshift_container_platform_for_ibm_linuxone4.9 – 4.9
- RedHat / openshift_container_platform_for_power4.9 – 4.9
- RedHat / openshift_container_platform_for_power4.10 – 4.10
- RedHat / single_sign-on7.6 – 7.6
- RedHat / single_sign-on
References
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2023:7854
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2023:7855
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2023:7856
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2023:7857
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2023:7858
- VENDOR_ADVISORYhttps://access.redhat.com/security/cve/CVE-2023-6563
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2253308
- MISChttps://github.com/keycloak/keycloak/issues/13340
Updated 21m ago · 8 sources