CVE-2017-1000087: Github branch source Remote Code Execution Vulnerability

MODERATE
Advisory Identifier: GHSA-6jp2-hggx-8j7p
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CVSS 4.3
CWE-200
Published
Advisory Summary

CVE-2017-1000087 is a MODERATE (CVSS 4.3) remote code execution vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Github branch source libraries in the Maven ecosystem. The issue involves jenkins github branch source plugin allows any user with overall/read permission to get list of valid credentials ids. Remediation is available by upgrading affected packages to version 2.2.0-alpha-1.

CVE-2017-1000087 at a Glance

CVE Identifier CVE-2017-1000087
GHSA Identifier GHSA-6jp2-hggx-8j7p
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Github branch source
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.3

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:N/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 None (I:N)
Availability None (A:N)

How to Fix CVE-2017-1000087

To remediate this vulnerability, upgrade all affected Github branch source 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:github-branch-source fixed: 2.2.0-alpha-1 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>github-branch-source</artifactId>
    <version>2.2.0-alpha-1</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-2017-1000087, 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 Github branch source in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.2.0-alpha-1), 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 Github branch source, 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

GitHub Branch Source provides a list of applicable credential IDs to allow users configuring a job to select the one they'd like to use. This functionality did not check permissions, allowing any user with Overall/Read permission to get a list of valid credentials IDs. Those could be used as part of an attack to capture the credentials using another vulnerability. An enumeration of credentials IDs in this plugin now requires the permission to have Extended Read permission (when that permission is enabled; otherwise Configure permission) to the job in whose context credentials are being accessed. If no job context exists, Overall/Administer permission is required.

CVE-2017-1000087 Affected Github branch source Versions

1 component(s)
Fixed Versions:
2.2.0-alpha-1
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:github-branch-source
maven/org.jenkins-ci.plugins/github-branch-source
Maven
< 2.2.0-alpha-1
2.2.0-alpha-1

References

NVD — CVE-2017-1000087 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-1000087
Github branch source Source Repository REPOSITORY
https://github.com/jenkinsci/github-branch-source-plugin
Github branch source Security Information SECURITY
https://jenkins.io/security/advisory/2017-07-10

Frequently Asked Questions

What is CVE-2017-1000087?
CVE-2017-1000087 is a security vulnerability in Github branch source involving Jenkins GitHub Branch Source Plugin allows any user with Overall/Read permission to get list of valid credentials IDs under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Github branch source versions are affected?
Affected versions include releases prior to 2.2.0-alpha-1 across affected packages: org.jenkins-ci.plugins:github-branch-source.
What version fixes CVE-2017-1000087?
Upgrading to 2.2.0-alpha-1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github-branch-source affected?
Yes, org.jenkins-ci.plugins:github-branch-source is affected in releases prior to 2.2.0-alpha-1. Upgrade your dependency to 2.2.0-alpha-1 or later.
What is the CVSS score of CVE-2017-1000087?
CVE-2017-1000087 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2017-1000087?
CVE-2017-1000087 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-2017-1000087?
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-6jp2-hggx-8j7p",
  "modified" : "2022-12-12T20:58:11Z",
  "published" : "2022-05-17T00:29:00Z",
  "aliases" : [ "CVE-2017-1000087" ],
  "summary" : "Jenkins GitHub Branch Source Plugin allows any user with Overall/Read permission to get list of valid credentials IDs",
  "details" : "GitHub Branch Source provides a list of applicable credential IDs to allow users configuring a job to select the one they'd like to use. This functionality did not check permissions, allowing any user with Overall/Read permission to get a list of valid credentials IDs. Those could be used as part of an attack to capture the credentials using another vulnerability. An enumeration of credentials IDs in this plugin now requires the permission to have Extended Read permission (when that permission is enabled; otherwise Configure permission) to the job in whose context credentials are being accessed. If no job context exists, Overall/Administer permission is required.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:github-branch-source"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.2.0-alpha-1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-1000087"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/github-branch-source-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2017-07-10"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-12T20:58:11Z",
    "nvd_published_at" : "2017-10-05T01:29:00Z"
  }
}