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.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.7, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 6 products from redhat, from redhat, from redhat and 3 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2023, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2023-12-14T18:15:45.540
2024-11-21T08:44:06.483
Modified
CVSSv3.1: 7.7 (HIGH)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | redhat | keycloak | < 21.0.0 | Yes |
| Application | redhat | single_sign-on | 7.6 | Yes |
| Operating System | redhat | enterprise_linux | 7.0 | No |
| Operating System | redhat | enterprise_linux | 8.0 | No |
| Operating System | redhat | enterprise_linux | 9.0 | No |
| Application | redhat | single_sign-on | - | Yes |
| Application | redhat | openshift_container_platform | 4.11 | Yes |
| Application | redhat | openshift_container_platform | 4.12 | Yes |
| Operating System | redhat | enterprise_linux | 8.0 | No |
| Application | redhat | openshift_container_platform_for_power | 4.9 | Yes |
| Application | redhat | openshift_container_platform_for_power | 4.10 | Yes |
| Operating System | redhat | enterprise_linux | 8.0 | No |
| Application | redhat | openshift_container_platform_for_ibm_linuxone | 4.9 | Yes |
| Application | redhat | openshift_container_platform_for_ibm_linuxone | 4.10 | Yes |
| Operating System | redhat | enterprise_linux | 8.0 | No |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For redhat's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.