CVE-2023-6563: Allocation of Resources Without Limits or Throttling
(updated )
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.
References
- access.redhat.com/errata/RHSA-2023:7854
- access.redhat.com/errata/RHSA-2023:7855
- access.redhat.com/errata/RHSA-2023:7856
- access.redhat.com/errata/RHSA-2023:7857
- access.redhat.com/errata/RHSA-2023:7858
- access.redhat.com/security/cve/CVE-2023-6563
- bugzilla.redhat.com/show_bug.cgi?id=2253308
- github.com/advisories/GHSA-54f3-c6hg-865h
- github.com/keycloak/keycloak/commit/556146f961f7c8ddf64de15e2117a58d045f72b5
- github.com/keycloak/keycloak/issues/13340
- github.com/keycloak/keycloak/pull/15463
- nvd.nist.gov/vuln/detail/CVE-2023-6563
Code Behaviors & Features
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