CVE-2019-16540: Support core Jenkins Support Core Plugin Allowed Vulnerability

HIGH
Advisory Identifier: GHSA-2cxg-448h-4wxj
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CVSS 7.1
CWE-22
Published
Advisory Summary

CVE-2019-16540 is a HIGH (CVSS 7.1) jenkins support core plugin allowed vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Support core libraries in the Maven ecosystem. The issue involves jenkins support core plugin allowed users with overall/read permission to delete arbitrary files. Remediation is available by upgrading affected packages to version 2.64.

CVE-2019-16540 at a Glance

CVE Identifier CVE-2019-16540
GHSA Identifier GHSA-2cxg-448h-4wxj
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Support core
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:N/I:H/A:L).

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 High (I:H)
Availability Low (A:L)

How to Fix CVE-2019-16540

To remediate this vulnerability, upgrade all affected Support core 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:support-core fixed: 2.64 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>support-core</artifactId>
    <version>2.64</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-2019-16540, 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 Support core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.64), 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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Support core, 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 Support Core Plugin did not validate the paths submitted for the "Delete Support Bundles" feature. This allowed users to delete arbitrary files on the Jenkins controller file system accessible to the OS user account running Jenkins. Additionally, this endpoint did not perform a permission check, allowing users with Overall/Read permission to delete support bundles, and any arbitrary other file, with a known name/path. Support Core Plugin now only allows the deletion of support bundles and related files listed on the UI through this feature. It also ensures that only users with "Download Bundle" permission are able to delete support bundles.

CVE-2019-16540 Affected Support core Versions

1 component(s)
Fixed Versions:
2.64
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:support-core
maven/org.jenkins-ci.plugins/support-core
Maven
< 2.64
2.64

References

NVD — CVE-2019-16540 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-16540
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/support-core-plugin/commit/6b177ea7cc7347e13fa87174472400bbbe78d422
Support core Source Repository REPOSITORY
https://github.com/jenkinsci/support-core-plugin
Support core Security Information SECURITY
https://jenkins.io/security/advisory/2019-11-21/#SECURITY-1634
Support core Security Information SECURITY
http://www.openwall.com/lists/oss-security/2019/11/21/1

Frequently Asked Questions

What is CVE-2019-16540?
CVE-2019-16540 is a security vulnerability in Support core involving Jenkins Support Core Plugin allowed users with Overall/Read permission to delete arbitrary files under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Support core versions are affected?
Affected versions include releases prior to 2.64 across affected packages: org.jenkins-ci.plugins:support-core.
What version fixes CVE-2019-16540?
Upgrading to 2.64 (or the latest patched release for your respective branch) resolves the vulnerability.
Is support-core affected?
Yes, org.jenkins-ci.plugins:support-core is affected in releases prior to 2.64. Upgrade your dependency to 2.64 or later.
What is the CVSS score of CVE-2019-16540?
CVE-2019-16540 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:N/I:H/A:L.
What CWE is associated with CVE-2019-16540?
CVE-2019-16540 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check Maven dependencies for CVE-2019-16540?
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-2cxg-448h-4wxj",
  "modified" : "2023-10-27T16:00:01Z",
  "published" : "2022-05-24T17:01:41Z",
  "aliases" : [ "CVE-2019-16540" ],
  "summary" : "Jenkins Support Core Plugin allowed users with Overall/Read permission to delete arbitrary files",
  "details" : "Jenkins Support Core Plugin did not validate the paths submitted for the \"Delete Support Bundles\" feature. This allowed users to delete arbitrary files on the Jenkins controller file system accessible to the OS user account running Jenkins.\n\nAdditionally, this endpoint did not perform a permission check, allowing users with Overall/Read permission to delete support bundles, and any arbitrary other file, with a known name/path.\n\nSupport Core Plugin now only allows the deletion of support bundles and related files listed on the UI through this feature. It also ensures that only users with \"Download Bundle\" permission are able to delete support bundles.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:support-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.64"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.63"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-16540"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/support-core-plugin/commit/6b177ea7cc7347e13fa87174472400bbbe78d422"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/support-core-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2019-11-21/#SECURITY-1634"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2019/11/21/1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-10-27T16:00:01Z",
    "nvd_published_at" : "2019-11-21T15:15:00Z"
  }
}