CVE-2020-2234: Pipeline maven Missing Permission Check Vulnerability

HIGH
Advisory Identifier: GHSA-mrr8-fcg7-p2wg
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CVSS 7.1
CWE-862 CWE-285
Published
Advisory Summary

CVE-2020-2234 is a HIGH (CVSS 7.1) missing permission check vulnerability (CWE-862: Missing Authorization) affecting Pipeline maven libraries in the Maven ecosystem. The issue involves missing permission check in jenkins pipeline maven integration plugin allow capturing credentials. Remediation is available by upgrading affected packages to version 3.8.3.

CVE-2020-2234 at a Glance

CVE Identifier CVE-2020-2234
GHSA Identifier GHSA-mrr8-fcg7-p2wg
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-862: Missing Authorization
Affected Product Pipeline maven
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.1

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:H/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 High (C:H)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2020-2234

To remediate this vulnerability, upgrade all affected Pipeline maven 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:pipeline-maven fixed: 3.8.3 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>pipeline-maven</artifactId>
    <version>3.8.3</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-2020-2234, 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 Pipeline maven in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.8.3), 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 Pipeline maven, 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

Pipeline Maven Integration Plugin 3.8.2 and earlier does not perform a permission check in a method implementing form validation. This allows users with Overall/Read access to Jenkins to connect to an attacker-specified JDBC URL using attacker-specified credentials IDs obtained through another method, potentially capturing credentials stored in Jenkins. Additionally, this form validation method does not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability. Pipeline Maven Integration Plugin 3.8.3 requires POST requests and Job/Configure permission for the affected form validation method.

CVE-2020-2234 Affected Pipeline maven Versions

1 component(s)
Fixed Versions:
3.8.3
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:pipeline-maven
maven/org.jenkins-ci.plugins/pipeline-maven
Maven
< 3.8.3
3.8.3

References

NVD — CVE-2020-2234 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-2234
Pipeline maven Source Repository REPOSITORY
https://github.com/jenkinsci/pipeline-maven-plugin
Pipeline maven Security Information SECURITY
https://jenkins.io/security/advisory/2020-08-12/#SECURITY-1794%20(2)
Pipeline maven Security Information SECURITY
http://www.openwall.com/lists/oss-security/2020/08/12/4

Frequently Asked Questions

What is CVE-2020-2234?
CVE-2020-2234 is a security vulnerability in Pipeline maven involving Missing permission check in Jenkins Pipeline Maven Integration Plugin allow capturing credentials under CWE-862: Missing Authorization.
Which Pipeline maven versions are affected?
Affected versions include releases prior to 3.8.3 across affected packages: org.jenkins-ci.plugins:pipeline-maven.
What version fixes CVE-2020-2234?
Upgrading to 3.8.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pipeline-maven affected?
Yes, org.jenkins-ci.plugins:pipeline-maven is affected in releases prior to 3.8.3. Upgrade your dependency to 3.8.3 or later.
What is the CVSS score of CVE-2020-2234?
CVE-2020-2234 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.
What CWE is associated with CVE-2020-2234?
CVE-2020-2234 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-2020-2234?
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-mrr8-fcg7-p2wg",
  "modified" : "2022-12-20T21:28:10Z",
  "published" : "2022-05-24T17:25:24Z",
  "aliases" : [ "CVE-2020-2234" ],
  "summary" : "Missing permission check in Jenkins Pipeline Maven Integration Plugin allow capturing credentials",
  "details" : "Pipeline Maven Integration Plugin 3.8.2 and earlier does not perform a permission check in a method implementing form validation.\n\nThis allows users with Overall/Read access to Jenkins to connect to an attacker-specified JDBC URL using attacker-specified credentials IDs obtained through another method, potentially capturing credentials stored in Jenkins.\n\nAdditionally, this form validation method does not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability.\n\nPipeline Maven Integration Plugin 3.8.3 requires POST requests and Job/Configure permission for the affected form validation method.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:pipeline-maven"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.8.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-2234"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/pipeline-maven-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2020-08-12/#SECURITY-1794%20(2)"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2020/08/12/4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-285", "CWE-862" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-20T21:28:10Z",
    "nvd_published_at" : "2020-08-12T14:15:00Z"
  }
}