CVE-2020-1698: Keycloak core Keycloak Leaks Sensitive Information Vulnerability

MODERATE
Advisory Identifier: GHSA-qgmm-f2qw-r95f
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CVSS 5.5
CWE-532 CWE-200
Published
Advisory Summary

CVE-2020-1698 is a MODERATE (CVSS 5.5) keycloak leaks sensitive information vulnerability (CWE-532: Insertion of Sensitive Information into Log File) affecting Keycloak core libraries in the Maven ecosystem. The issue involves keycloak leaks sensitive information in logged exceptions. Remediation is available by upgrading affected packages to version 9.0.0.

CVE-2020-1698 at a Glance

CVE Identifier CVE-2020-1698
GHSA Identifier GHSA-qgmm-f2qw-r95f
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-532: Insertion of Sensitive Information into Log File
Affected Product Keycloak core
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

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

How to Fix CVE-2020-1698

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: 9.0.0 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-core</artifactId>
    <version>9.0.0</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-2020-1698, 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 9.0.0), 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-532: Insertion of Sensitive Information into Log File, where the product writes sensitive information to a log file. 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

A flaw was found in keycloak in versions before 9.0.0. A logged exception in the HttpMethod class may leak the password given as parameter. The highest threat from this vulnerability is to data confidentiality.

CVE-2020-1698 Affected Keycloak core Versions

1 component(s)
Fixed Versions:
9.0.0
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-core
maven/org.keycloak/keycloak-core
Maven
< 9.0.0
9.0.0

References

NVD — CVE-2020-1698 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-1698
Keycloak core Source Repository REPOSITORY
https://github.com/keycloak/keycloak/pull/6751
Security Fix Commit FIX COMMIT
https://github.com/keycloak/keycloak/commit/62c9e1577618470832ede22dcedd46cba15b1836
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1698

Frequently Asked Questions

What is CVE-2020-1698?
CVE-2020-1698 is a security vulnerability in Keycloak core involving Keycloak leaks sensitive information in logged exceptions under CWE-532: Insertion of Sensitive Information into Log File.
Which Keycloak core versions are affected?
Affected versions include releases prior to 9.0.0 across affected packages: org.keycloak:keycloak-core.
What version fixes CVE-2020-1698?
Upgrading to 9.0.0 (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 9.0.0. Upgrade your dependency to 9.0.0 or later.
What is the CVSS score of CVE-2020-1698?
CVE-2020-1698 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2020-1698?
CVE-2020-1698 is classified under CWE-532: Insertion of Sensitive Information into Log File (The product writes sensitive information to a log file.).
How can I check Maven dependencies for CVE-2020-1698?
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-qgmm-f2qw-r95f",
  "modified" : "2024-04-22T23:11:33Z",
  "published" : "2022-05-24T17:17:37Z",
  "aliases" : [ "CVE-2020-1698" ],
  "summary" : "Keycloak leaks sensitive information in logged exceptions",
  "details" : "A flaw was found in keycloak in versions before 9.0.0. A logged exception in the HttpMethod class may leak the password given as parameter. The highest threat from this vulnerability is to data confidentiality.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "9.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-1698"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/pull/6751"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/commit/62c9e1577618470832ede22dcedd46cba15b1836"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1698"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-532" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-22T23:11:33Z",
    "nvd_published_at" : "2020-05-11T14:15:00Z"
  }
}