Allocation of Resources Without Limits or Throttling Affecting rh-sso7-keycloak-server package, versions <0:18.0.11-2.redhat_00003.1.el8sso


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.24% (66th percentile)

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  • Snyk IDSNYK-RHEL8-RHSSO7KEYCLOAKSERVER-6129060
  • published15 Dec 2023
  • disclosed14 Dec 2023

Introduced: 14 Dec 2023

CVE-2023-6563  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade RHEL:8 rh-sso7-keycloak-server to version 0:18.0.11-2.redhat_00003.1.el8sso or higher.
This issue was patched in RHSA-2023:7856.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rh-sso7-keycloak-server package and not the rh-sso7-keycloak-server package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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 Base Scores

version 3.1