CVE-2021-21647: Electricflow Missing Permission Check Vulnerability

MODERATE
Advisory Identifier: GHSA-7rx6-4vwv-432g
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CVSS 4.3
CWE-862
Published
Advisory Summary

CVE-2021-21647 is a MODERATE (CVSS 4.3) missing permission check vulnerability (CWE-862: Missing Authorization) affecting Electricflow libraries in the Maven ecosystem. The issue involves missing permission check in jenkins cloudbees cd plugin allows scheduling builds. Remediation is available by upgrading affected packages to version 1.1.18.1, 1.1.22.

CVE-2021-21647 at a Glance

CVE Identifier CVE-2021-21647
GHSA Identifier GHSA-7rx6-4vwv-432g
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-862: Missing Authorization
Affected Product Electricflow
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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 None (C:N)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2021-21647

To remediate this vulnerability, upgrade all affected Electricflow 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:electricflow fixed: 1.1.18.1 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>electricflow</artifactId>
    <version>1.1.18.1</version>
</dependency>
org.jenkins-ci.plugins:electricflow fixed: 1.1.22 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>electricflow</artifactId>
    <version>1.1.22</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-2021-21647, 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 Electricflow in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.1.18.1), 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-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In Electricflow, 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

Jenkins CloudBees CD Plugin does not perform a permission check in an HTTP endpoint. This allows attackers with Item/Read permission to schedule builds of projects without having Item/Build permission. Jenkins CloudBees CD Plugin requires Item/Build permission to schedule builds via its HTTP endpoint.

CVE-2021-21647 Affected Electricflow Versions

2 component(s)
Fixed Versions:
1.1.18.11.1.22
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:electricflow
maven/org.jenkins-ci.plugins/electricflow
Maven
< 1.1.18.1
1.1.18.1
org.jenkins-ci.plugins:electricflow
maven/org.jenkins-ci.plugins/electricflow
Maven
≥ 1.1.19
< 1.1.22
1.1.22

References

NVD — CVE-2021-21647 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21647
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/electricflow-plugin/commit/597cbb1d767ae92c44b4cbd9525fa53ddab37117
Electricflow Source Repository REPOSITORY
https://github.com/jenkinsci/electricflow-plugin
Electricflow Security Information SECURITY
https://www.jenkins.io/security/advisory/2021-04-21/#SECURITY-2309
Electricflow Security Information SECURITY
http://www.openwall.com/lists/oss-security/2021/04/21/2

Frequently Asked Questions

What is CVE-2021-21647?
CVE-2021-21647 is a security vulnerability in Electricflow involving Missing permission check in Jenkins CloudBees CD Plugin allows scheduling builds under CWE-862: Missing Authorization.
Which Electricflow versions are affected?
Affected versions include releases prior to 1.1.18.1, 1.1.22 across affected packages: org.jenkins-ci.plugins:electricflow.
What version fixes CVE-2021-21647?
Upgrading to 1.1.18.1, 1.1.22 (or the latest patched release for your respective branch) resolves the vulnerability.
Is electricflow affected?
Yes, org.jenkins-ci.plugins:electricflow is affected in releases prior to 1.1.18.1, 1.1.22. Upgrade your dependency to 1.1.18.1, 1.1.22 or later.
What is the CVSS score of CVE-2021-21647?
CVE-2021-21647 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2021-21647?
CVE-2021-21647 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Maven dependencies for CVE-2021-21647?
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-7rx6-4vwv-432g",
  "modified" : "2023-10-27T14:26:45Z",
  "published" : "2022-05-24T17:48:06Z",
  "aliases" : [ "CVE-2021-21647" ],
  "summary" : "Missing permission check in Jenkins CloudBees CD Plugin allows scheduling builds",
  "details" : "Jenkins CloudBees CD Plugin does not perform a permission check in an HTTP endpoint.\n\nThis allows attackers with Item/Read permission to schedule builds of projects without having Item/Build permission.\n\nJenkins CloudBees CD Plugin requires Item/Build permission to schedule builds via its HTTP endpoint.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:electricflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.1.18.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:electricflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.1.19"
      }, {
        "fixed" : "1.1.22"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-21647"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/electricflow-plugin/commit/597cbb1d767ae92c44b4cbd9525fa53ddab37117"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/electricflow-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2021-04-21/#SECURITY-2309"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2021/04/21/2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-13T19:28:45Z",
    "nvd_published_at" : "2021-04-21T15:15:00Z"
  }
}