What is CVE-2021-3637?

CVE-2021-3637 is a high-severity vulnerability in Red Hat Keycloak, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2021-07-09.

How severe is CVE-2021-3637?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Red Hat Keycloak

CVE-2021-3637

A flaw was found in keycloak-model-infinispan in keycloak versions before 14.0.0 where authenticationSessions map in RootAuthenticationSessionEntity grows boundlessly which could lead to a DoS attack.

EPSS: 0.011 (63.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Redhat Keycloak
Redhat Single_sign-on — versions 7.0
N/a Keycloak-model-infinispan — versions keycloak 14.0.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

secalert@redhat.com (x_refsource_MISC, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2021-3637?: CVE-2021-3637 is a high-severity vulnerability in Red Hat Keycloak, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2021-07-09.
How severe is CVE-2021-3637?: High severity. CVSS v3 base score is 7.5 out of 10.