CVE-2017-18239: Authentikat jwt 2.12 Exposure Of Sensitive Information Vulnerability

CRITICAL
Advisory Identifier: GHSA-3rhm-67j6-42jq
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CVSS 9.8
Published
Advisory Summary

CVE-2017-18239 is a CRITICAL (CVSS 9.8) exposure of sensitive information vulnerability (General Security Weakness) affecting Authentikat jwt 2.12 libraries in the Maven ecosystem. The issue involves exposure of sensitive information in authentikat-jwt. Remediation is available by upgrading affected packages to version 0.4.6.

CVE-2017-18239 at a Glance

CVE Identifier CVE-2017-18239
GHSA Identifier GHSA-3rhm-67j6-42jq
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification General Security Weakness
Affected Product Authentikat jwt 2.12
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

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

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

How to Fix CVE-2017-18239

To remediate this vulnerability, upgrade all affected Authentikat jwt 2.12 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

com.jason-goodwin:authentikat-jwt_2.12 fixed: 0.4.6 
<dependency>
    <groupId>com.jason-goodwin</groupId>
    <artifactId>authentikat-jwt_2.12</artifactId>
    <version>0.4.6</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=com.jason-goodwin

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2017-18239, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=com.jason-goodwin

Analyze the terminal output to locate any version of Authentikat jwt 2.12 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.4.6), your application is affected.

Note: The mvn dependency:tree -Dincludes=com.jason-goodwin 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 General Security Weakness. In Authentikat jwt 2.12, 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 time-sensitive equality check on the JWT signature in the JsonWebToken.validate method in main/scala/authentikat/jwt/JsonWebToken.scala in authentikat-jwt (aka com.jason-goodwin/authentikat-jwt) version 0.4.5 and earlier allows the supplier of a JWT token to guess bit after bit of the signature by repeating validation requests.

CVE-2017-18239 Affected Authentikat jwt 2.12 Versions

1 component(s)
Fixed Versions:
0.4.6
Product / Package Ecosystem Affected Versions Fixed Version
com.jason-goodwin:authentikat-jwt_2.12
maven/com.jason-goodwin/authentikat-jwt_2.12
Maven
< 0.4.6
0.4.6

References

NVD — CVE-2017-18239 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-18239
Authentikat jwt 2.12 Source Repository REPOSITORY
https://github.com/jasongoodwin/authentikat-jwt/issues/12
Authentikat jwt 2.12 Source Repository REPOSITORY
https://github.com/jasongoodwin/authentikat-jwt/pull/36
Security Fix Commit FIX COMMIT
https://github.com/jasongoodwin/authentikat-jwt/commit/2d2fa0d40ac8f2f7aa7e9b070fa1a25eee082cb0
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-3rhm-67j6-42jq
Authentikat jwt 2.12 Source Repository REPOSITORY
https://github.com/jasongoodwin/authentikat-jwt

Frequently Asked Questions

What is CVE-2017-18239?
CVE-2017-18239 is a security vulnerability in Authentikat jwt 2.12 involving Exposure of Sensitive information in authentikat-jwt under General Security Weakness.
Which Authentikat jwt 2.12 versions are affected?
Affected versions include releases prior to 0.4.6 across affected packages: com.jason-goodwin:authentikat-jwt_2.12.
What version fixes CVE-2017-18239?
Upgrading to 0.4.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is authentikat-jwt_2.12 affected?
Yes, com.jason-goodwin:authentikat-jwt_2.12 is affected in releases prior to 0.4.6. Upgrade your dependency to 0.4.6 or later.
What is the CVSS score of CVE-2017-18239?
CVE-2017-18239 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2017-18239?
CVE-2017-18239 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2017-18239?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=com.jason-goodwin'. 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-3rhm-67j6-42jq",
  "modified" : "2022-09-14T19:18:31Z",
  "published" : "2018-11-09T17:50:40Z",
  "aliases" : [ "CVE-2017-18239" ],
  "summary" : "Exposure of Sensitive information in authentikat-jwt",
  "details" : "A time-sensitive equality check on the JWT signature in the JsonWebToken.validate method in main/scala/authentikat/jwt/JsonWebToken.scala in authentikat-jwt (aka com.jason-goodwin/authentikat-jwt) version 0.4.5 and earlier allows the supplier of a JWT token to guess bit after bit of the signature by repeating validation requests.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "com.jason-goodwin:authentikat-jwt_2.12"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.4.6"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.4.5"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-18239"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jasongoodwin/authentikat-jwt/issues/12"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jasongoodwin/authentikat-jwt/pull/36"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jasongoodwin/authentikat-jwt/commit/2d2fa0d40ac8f2f7aa7e9b070fa1a25eee082cb0"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-3rhm-67j6-42jq"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jasongoodwin/authentikat-jwt"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T20:56:11Z",
    "nvd_published_at" : null
  }
}