CVE-2018-10894: Keycloak saml adapter core Keycloak Authentication Error Vulnerability

MODERATE
Advisory Identifier: GHSA-xvv8-8wh9-9fh2
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CVSS 5.4
CWE-295
Published
Advisory Summary

CVE-2018-10894 is a MODERATE (CVSS 5.4) keycloak authentication error vulnerability (CWE-295: Improper Certificate Validation) affecting Keycloak saml adapter core libraries in the Maven ecosystem. The issue involves keycloak authentication error. Remediation is available by upgrading affected packages to version 4.4.0.Final.

CVE-2018-10894 at a Glance

CVE Identifier CVE-2018-10894
GHSA Identifier GHSA-xvv8-8wh9-9fh2
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-295: Improper Certificate Validation
Affected Product Keycloak saml adapter core
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.4

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2018-10894

To remediate this vulnerability, upgrade all affected Keycloak saml adapter 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-saml-adapter-core fixed: 4.4.0.Final 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-saml-adapter-core</artifactId>
    <version>4.4.0.Final</version>
</dependency>
org.keycloak:keycloak-services fixed: 4.4.0.Final 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-services</artifactId>
    <version>4.4.0.Final</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-2018-10894, 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 saml adapter core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.4.0.Final), 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-295: Improper Certificate Validation, where the product does not validate, or incorrectly validates, a certificate. In Keycloak saml adapter 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

It was found that SAML authentication in Keycloak 3.4.3.Final incorrectly authenticated expired certificates. A malicious user could use this to access unauthorized data or possibly conduct further attacks.

CVE-2018-10894 Affected Keycloak saml adapter core Versions

2 component(s)
Fixed Versions:
4.4.0.Final
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-saml-adapter-core
maven/org.keycloak/keycloak-saml-adapter-core
Maven
< 4.4.0.Final
4.4.0.Final
org.keycloak:keycloak-services
maven/org.keycloak/keycloak-services
Maven
< 4.4.0.Final
4.4.0.Final

References

NVD — CVE-2018-10894 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-10894
Security Fix Commit FIX COMMIT
https://github.com/keycloak/keycloak/commit/812e76c39b1e693e8f11e5549cca2c90631f372e
access.redhat.com/errata/rhsa-2018:35... WEB
https://access.redhat.com/errata/RHSA-2018:3592
access.redhat.com/errata/rhsa-2018:35... WEB
https://access.redhat.com/errata/RHSA-2018:3593
access.redhat.com/errata/rhsa-2018:35... WEB
https://access.redhat.com/errata/RHSA-2018:3595
access.redhat.com/errata/rhsa-2019:08... WEB
https://access.redhat.com/errata/RHSA-2019:0877
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10894
Keycloak saml adapter core Source Repository REPOSITORY
https://github.com/keycloak/keycloak

Frequently Asked Questions

What is CVE-2018-10894?
CVE-2018-10894 is a security vulnerability in Keycloak saml adapter core involving Keycloak Authentication Error under CWE-295: Improper Certificate Validation.
Which Keycloak saml adapter core versions are affected?
Affected versions include releases prior to 4.4.0.Final across affected packages: org.keycloak:keycloak-saml-adapter-core, org.keycloak:keycloak-services.
What version fixes CVE-2018-10894?
Upgrading to 4.4.0.Final (or the latest patched release for your respective branch) resolves the vulnerability.
Is keycloak-saml-adapter-core affected?
Yes, org.keycloak:keycloak-saml-adapter-core is affected in releases prior to 4.4.0.Final. Upgrade your dependency to 4.4.0.Final or later.
Is keycloak-services affected?
Yes, org.keycloak:keycloak-services is affected in releases prior to 4.4.0.Final. Upgrade your dependency to 4.4.0.Final or later.
What is the CVSS score of CVE-2018-10894?
CVE-2018-10894 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2018-10894?
CVE-2018-10894 is classified under CWE-295: Improper Certificate Validation (The product does not validate, or incorrectly validates, a certificate.).
How can I check Maven dependencies for CVE-2018-10894?
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-xvv8-8wh9-9fh2",
  "modified" : "2023-10-06T17:25:01Z",
  "published" : "2022-05-13T01:34:55Z",
  "aliases" : [ "CVE-2018-10894" ],
  "summary" : "Keycloak Authentication Error",
  "details" : "It was found that SAML authentication in Keycloak 3.4.3.Final incorrectly authenticated expired certificates. A malicious user could use this to access unauthorized data or possibly conduct further attacks.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-saml-adapter-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.4.0.Final"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-services"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.4.0.Final"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-10894"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/commit/812e76c39b1e693e8f11e5549cca2c90631f372e"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2018:3592"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2018:3593"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2018:3595"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2019:0877"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10894"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/keycloak/keycloak"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-295" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-21T21:34:55Z",
    "nvd_published_at" : "2018-08-01T17:29:00Z"
  }
}