CVE-2023-6563: Keycloak model jpa Remote Code Execution Vulnerability
HIGHCVE-2023-6563 is a HIGH (CVSS 7.7) remote code execution vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Keycloak model jpa libraries in the Maven ecosystem. The issue involves allocation of resources without limits in keycloak. Remediation is available by upgrading affected packages to version 21.0.0.
CVE-2023-6563 at a Glance
Security Impact
CVSS: 7.7
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H).
How to Fix CVE-2023-6563
To remediate this vulnerability, upgrade all affected Keycloak model jpa dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>org.keycloak</groupId>
<artifactId>keycloak-model-jpa</artifactId>
<version>21.0.0</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=org.keycloakHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2023-6563, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=org.keycloakAnalyze the terminal output to locate any version of Keycloak model jpa in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 21.0.0), your application is affected.
Note: The mvn dependency:tree -Dincludes=org.keycloak command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. In Keycloak model jpa, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2023-6563 Affected Keycloak model jpa Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.keycloak:keycloak-model-jpa
|
Maven |
< 21.0.0
|
21.0.0
|
References
Frequently Asked Questions
What is CVE-2023-6563?
Which Keycloak model jpa versions are affected?
What version fixes CVE-2023-6563?
Is keycloak-model-jpa affected?
What is the CVSS score of CVE-2023-6563?
What CWE is associated with CVE-2023-6563?
How can I check Maven dependencies for CVE-2023-6563?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-54f3-c6hg-865h",
"modified" : "2023-12-29T00:14:20Z",
"published" : "2023-12-14T18:30:22Z",
"aliases" : [ "CVE-2023-6563" ],
"summary" : "Allocation of Resources Without Limits in Keycloak",
"details" : "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. ",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.keycloak:keycloak-model-jpa"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "21.0.0"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-6563"
}, {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/issues/13340"
}, {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/pull/15463"
}, {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/commit/556146f961f7c8ddf64de15e2117a58d045f72b5"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2023:7854"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2023:7855"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2023:7856"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2023:7857"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2023:7858"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/security/cve/CVE-2023-6563"
}, {
"type" : "WEB",
"url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2253308"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/keycloak/keycloak"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-770" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2023-12-15T23:17:43Z",
"nvd_published_at" : "2023-12-14T18:15:45Z"
}
}