Allocation of Resources Without Limits in Keycloak
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2023-6563US | high7.7 | — | ||
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 h… | ||||
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references
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHSA-2023:7854WEB
- https://access.redhat.com/errata/RHSA-2023:7855WEB
- https://access.redhat.com/errata/RHSA-2023:7856WEB
- https://access.redhat.com/errata/RHSA-2023:7857WEB
- https://access.redhat.com/errata/RHSA-2023:7858WEB
- https://access.redhat.com/security/cve/CVE-2023-6563WEB
- https://bugzilla.redhat.com/show_bug.cgi?id=2253308WEB
- https://github.com/keycloak/keycloakPACKAGE
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