CVE-2023-6563 Keycloak: offline session token dos

2023-12-1418:01:26

CWE-770

redhat

www.cve.org

keycloak

session token

vulnerability

memory consumption

admin

cpu consumption

7.7 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

7.5 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

39.6%

JSON

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.

CNA Affected

[
  {
    "vendor": "Red Hat",
    "product": "Red Hat Single Sign-On 7.6 for RHEL 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "rh-sso7-keycloak",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:18.0.11-2.redhat_00003.1.el7sso",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:red_hat_single_sign_on:7.6::el7"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Single Sign-On 7.6 for RHEL 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "rh-sso7-keycloak",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:18.0.11-2.redhat_00003.1.el8sso",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:red_hat_single_sign_on:7.6::el8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Single Sign-On 7.6 for RHEL 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "rh-sso7-keycloak",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:18.0.11-2.redhat_00003.1.el9sso",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:red_hat_single_sign_on:7.6::el9"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "RHEL-8 based Middleware Containers",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "packageName": "rh-sso-7/sso76-openshift-rhel8",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "7.6-38",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhosemc:1.0::el8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "RHEL-8 based Middleware Containers",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "packageName": "rh-sso-7/sso7-rhel8-operator-bundle",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "7.6.6-2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhosemc:1.0::el8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Single Sign-On 7.6.6",
    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
    "defaultStatus": "unaffected",
    "packageName": "keycloak-core",
    "cpes": [
      "cpe:/a:redhat:red_hat_single_sign_on:7.6.6"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Build of Keycloak",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "keycloak-core",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:build_keycloak:22"
    ]
  }
]