CVE-2019-3868: Keycloak core Exposure Of Sensitive Information To Vulnerability

MODERATE
Advisory Identifier: GHSA-gc52-xj6p-9pxp
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CVSS 3.8
CWE-200
Published
Advisory Summary

CVE-2019-3868 is a MODERATE (CVSS 3.8) exposure of sensitive information to vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Keycloak core libraries in the Maven ecosystem. The issue involves exposure of sensitive information to an unauthorized actor in keycloak. Remediation is available by upgrading affected packages to version 6.0.0.

CVE-2019-3868 at a Glance

CVE Identifier CVE-2019-3868
GHSA Identifier GHSA-gc52-xj6p-9pxp
Severity MODERATE
CVSS v3.1 Base Score 3.8
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Keycloak core
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 3.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2019-3868

To remediate this vulnerability, upgrade all affected Keycloak core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.keycloak:keycloak-core fixed: 6.0.0 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-core</artifactId>
    <version>6.0.0</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.keycloak

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2019-3868, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.keycloak

Analyze the terminal output to locate any version of Keycloak core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.0.0), 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-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Keycloak core, 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

Keycloak up to version 6.0.0 allows the end user token (access or id token JWT) to be used as the session cookie for browser sessions for OIDC. As a result an attacker with access to service provider backend could hijack user?s browser session.

CVE-2019-3868 Affected Keycloak core Versions

1 component(s)
Fixed Versions:
6.0.0
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-core
maven/org.keycloak/keycloak-core
Maven
< 6.0.0
6.0.0

References

NVD — CVE-2019-3868 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-3868
access.redhat.com/errata/rhsa-2019:11... WEB
https://access.redhat.com/errata/RHSA-2019:1140
access.redhat.com/errata/rhsa-2019:29... WEB
https://access.redhat.com/errata/RHSA-2019:2998
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3868
Keycloak core Security Information SECURITY
http://www.securityfocus.com/bid/108061

Frequently Asked Questions

What is CVE-2019-3868?
CVE-2019-3868 is a security vulnerability in Keycloak core involving Exposure of Sensitive Information to an Unauthorized Actor in Keycloak under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Keycloak core versions are affected?
Affected versions include releases prior to 6.0.0 across affected packages: org.keycloak:keycloak-core.
What version fixes CVE-2019-3868?
Upgrading to 6.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is keycloak-core affected?
Yes, org.keycloak:keycloak-core is affected in releases prior to 6.0.0. Upgrade your dependency to 6.0.0 or later.
What is the CVSS score of CVE-2019-3868?
CVE-2019-3868 has a CVSS v3.1 base score of 3.8 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2019-3868?
CVE-2019-3868 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Maven dependencies for CVE-2019-3868?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.keycloak'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gc52-xj6p-9pxp",
  "modified" : "2021-08-03T21:24:04Z",
  "published" : "2019-04-30T15:37:21Z",
  "aliases" : [ "CVE-2019-3868" ],
  "summary" : "Exposure of Sensitive Information to an Unauthorized Actor in Keycloak",
  "details" : "Keycloak up to version 6.0.0 allows the end user token (access or id token JWT) to be used as the session cookie for browser sessions for OIDC. As a result an attacker with access to service provider backend could hijack user?s browser session.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "6.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-3868"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2019:1140"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2019:2998"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3868"
  }, {
    "type" : "WEB",
    "url" : "http://www.securityfocus.com/bid/108061"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2019-04-30T15:16:15Z",
    "nvd_published_at" : "2019-04-24T16:29:00Z"
  }
}