CVE-2018-1000142: Ghprb Jenkins GitHub Pull Request Builder Vulnerability

MODERATE
Advisory Identifier: GHSA-hr74-2j5v-ghfv
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CVSS 4.0
CWE-200
Published
Advisory Summary

CVE-2018-1000142 is a MODERATE (CVSS 4.0) jenkins github pull request builder vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Ghprb libraries in the Maven ecosystem. The issue involves jenkins github pull request builder plugin allows attacker with local file system access to obtain github credentials. Remediation is available by upgrading affected packages to version 1.40.0.

CVE-2018-1000142 at a Glance

CVE Identifier CVE-2018-1000142
GHSA Identifier GHSA-hr74-2j5v-ghfv
Severity MODERATE
CVSS v3.1 Base Score 4.0
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Ghprb
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.0

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

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

How to Fix CVE-2018-1000142

To remediate this vulnerability, upgrade all affected Ghprb 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.jenkins-ci.plugins:ghprb fixed: 1.40.0 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>ghprb</artifactId>
    <version>1.40.0</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.jenkins-ci.plugins

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2018-1000142, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.jenkins-ci.plugins

Analyze the terminal output to locate any version of Ghprb in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.40.0), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.jenkins-ci.plugins 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 Ghprb, 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

An exposure of sensitive information vulnerability exists in Jenkins GitHub Pull Request Builder Plugin version 1.39.0 and older in GhprbCause.java that allows an attacker with local file system access to obtain GitHub credentials. Since 1.40.0, the plugin no longer stores serialized objects containing the credential on disk. Builds started before the plugin was updated to 1.40.0 will retain the encoded credentials on disk. We strongly recommend revoking old GitHub credentials used in Jenkins. We’re providing a script for use in the Script Console that will attempt to remove old stored credentials from build.xml files.

CVE-2018-1000142 Affected Ghprb Versions

1 component(s)
Fixed Versions:
1.40.0
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:ghprb
maven/org.jenkins-ci.plugins/ghprb
Maven
< 1.40.0
1.40.0

References

NVD — CVE-2018-1000142 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-1000142
Ghprb Source Repository REPOSITORY
https://github.com/jenkinsci/ghprb-plugin
Ghprb Security Information SECURITY
https://jenkins.io/security/advisory/2018-03-26/#SECURITY-261

Frequently Asked Questions

What is CVE-2018-1000142?
CVE-2018-1000142 is a security vulnerability in Ghprb involving Jenkins GitHub Pull Request Builder Plugin allows attacker with local file system access to obtain GitHub credentials under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Ghprb versions are affected?
Affected versions include releases prior to 1.40.0 across affected packages: org.jenkins-ci.plugins:ghprb.
What version fixes CVE-2018-1000142?
Upgrading to 1.40.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ghprb affected?
Yes, org.jenkins-ci.plugins:ghprb is affected in releases prior to 1.40.0. Upgrade your dependency to 1.40.0 or later.
What is the CVSS score of CVE-2018-1000142?
CVE-2018-1000142 has a CVSS v3.1 base score of 4.0 (MODERATE) with vector string CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2018-1000142?
CVE-2018-1000142 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-2018-1000142?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jenkins-ci.plugins'. 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-hr74-2j5v-ghfv",
  "modified" : "2022-12-12T21:06:35Z",
  "published" : "2022-05-14T03:23:44Z",
  "aliases" : [ "CVE-2018-1000142" ],
  "summary" : "Jenkins GitHub Pull Request Builder Plugin allows attacker with local file system access to obtain GitHub credentials",
  "details" : "An exposure of sensitive information vulnerability exists in Jenkins GitHub Pull Request Builder Plugin version 1.39.0 and older in GhprbCause.java that allows an attacker with local file system access to obtain GitHub credentials. Since 1.40.0, the plugin no longer stores serialized objects containing the credential on disk. Builds started before the plugin was updated to 1.40.0 will retain the encoded credentials on disk. We strongly recommend revoking old GitHub credentials used in Jenkins. We’re providing a script for use in the Script Console that will attempt to remove old stored credentials from build.xml files.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:ghprb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.40.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.39.0"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-1000142"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/ghprb-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2018-03-26/#SECURITY-261"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-12T21:06:35Z",
    "nvd_published_at" : "2018-04-05T13:29:00Z"
  }
}