{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2023-6563", "ASSIGNER": "secalert@redhat.com", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "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." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "Allocation of Resources Without Limits or Throttling", "cweId": "CWE-770" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "n/a", "product": { "product_data": [ { "product_name": "keycloak", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "21.0.0", "status": "unaffected" } ] } } ] } } ] } }, { "vendor_name": "Red Hat", "product": { "product_data": [ { "product_name": "Red Hat Single Sign-On 7.6 for RHEL 7", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "0:18.0.11-2.redhat_00003.1.el7sso", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } } ] } }, { "product_name": "Red Hat Single Sign-On 7.6 for RHEL 8", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "0:18.0.11-2.redhat_00003.1.el8sso", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } } ] } }, { "product_name": "Red Hat Single Sign-On 7.6 for RHEL 9", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "0:18.0.11-2.redhat_00003.1.el9sso", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } } ] } }, { "product_name": "RHEL-8 based Middleware Containers", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "7.6-38", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "7.6.6-2", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } } ] } }, { "product_name": "Single Sign-On 7.6.6", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "unaffected" } } ] } }, { "product_name": "Red Hat Build of Keycloak", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "unknown" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://access.redhat.com/errata/RHSA-2023:7854", "refsource": "MISC", "name": "https://access.redhat.com/errata/RHSA-2023:7854" }, { "url": "https://access.redhat.com/errata/RHSA-2023:7855", "refsource": "MISC", "name": "https://access.redhat.com/errata/RHSA-2023:7855" }, { "url": "https://access.redhat.com/errata/RHSA-2023:7856", "refsource": "MISC", "name": "https://access.redhat.com/errata/RHSA-2023:7856" }, { "url": "https://access.redhat.com/errata/RHSA-2023:7857", "refsource": "MISC", "name": "https://access.redhat.com/errata/RHSA-2023:7857" }, { "url": "https://access.redhat.com/errata/RHSA-2023:7858", "refsource": "MISC", "name": "https://access.redhat.com/errata/RHSA-2023:7858" }, { "url": "https://access.redhat.com/security/cve/CVE-2023-6563", "refsource": "MISC", "name": "https://access.redhat.com/security/cve/CVE-2023-6563" }, { "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2253308", "refsource": "MISC", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2253308" }, { "url": "https://github.com/keycloak/keycloak/issues/13340", "refsource": "MISC", "name": "https://github.com/keycloak/keycloak/issues/13340" } ] }, "work_around": [ { "lang": "en", "value": "There are three main options to prevent exploitation:\n1) If you are using a reverse proxy, block the consents URL.\n2) This option is less effective: remove the consents application tab from the account console theme.\n3) This option has a significant negative impact on end users: entirely disable offline user profiles." } ], "impact": { "cvss": [ { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "version": "3.1" } ] } }