CVE-2023-32979: Email ext Jenkins Email Extension Plugin Missing Vulnerability

MODERATE
Advisory Identifier: GHSA-6gp4-2f92-j2w5
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CVSS 4.3
CWE-732
Published
Advisory Summary

CVE-2023-32979 is a MODERATE (CVSS 4.3) jenkins email extension plugin missing vulnerability (CWE-732: Incorrect Permission Assignment for Critical Resource) affecting Email ext libraries in the Maven ecosystem. The issue involves jenkins email extension plugin missing permission check. Remediation is available by upgrading affected packages to version 2.96.1.

CVE-2023-32979 at a Glance

CVE Identifier CVE-2023-32979
GHSA Identifier GHSA-6gp4-2f92-j2w5
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-732: Incorrect Permission Assignment for Critical Resource
Affected Product Email ext
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: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-2023-32979

To remediate this vulnerability, upgrade all affected Email ext 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:email-ext fixed: 2.96.1 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>email-ext</artifactId>
    <version>2.96.1</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-2023-32979, 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 Email ext in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.96.1), 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-732: Incorrect Permission Assignment for Critical Resource, where the product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. In Email ext, 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 Email Extension Plugin 2.96 and earlier does not perform a permission check in a method implementing form validation. This allows attackers with Overall/Read permission to check for the existence of files in the `email-templates/` directory in the Jenkins home directory on the controller file system. This form validation method requires the appropriate permission in Email Extension Plugin 2.96.1.

CVE-2023-32979 Affected Email ext Versions

1 component(s)
Fixed Versions:
2.96.1
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:email-ext
maven/org.jenkins-ci.plugins/email-ext
Maven
< 2.96.1
2.96.1

References

NVD — CVE-2023-32979 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-32979
Email ext Security Information SECURITY
https://www.jenkins.io/security/advisory/2023-05-16/#SECURITY-3088%20(1)

Frequently Asked Questions

What is CVE-2023-32979?
CVE-2023-32979 is a security vulnerability in Email ext involving Jenkins Email Extension Plugin missing permission check under CWE-732: Incorrect Permission Assignment for Critical Resource.
Which Email ext versions are affected?
Affected versions include releases prior to 2.96.1 across affected packages: org.jenkins-ci.plugins:email-ext.
What version fixes CVE-2023-32979?
Upgrading to 2.96.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is email-ext affected?
Yes, org.jenkins-ci.plugins:email-ext is affected in releases prior to 2.96.1. Upgrade your dependency to 2.96.1 or later.
What is the CVSS score of CVE-2023-32979?
CVE-2023-32979 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:L/I:N/A:N.
What CWE is associated with CVE-2023-32979?
CVE-2023-32979 is classified under CWE-732: Incorrect Permission Assignment for Critical Resource (The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.).
How can I check Maven dependencies for CVE-2023-32979?
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-6gp4-2f92-j2w5",
  "modified" : "2023-05-17T02:59:02Z",
  "published" : "2023-05-16T18:30:16Z",
  "aliases" : [ "CVE-2023-32979" ],
  "summary" : "Jenkins Email Extension Plugin missing permission check",
  "details" : "Jenkins Email Extension Plugin 2.96 and earlier does not perform a permission check in a method implementing form validation.\n\nThis allows attackers with Overall/Read permission to check for the existence of files in the `email-templates/` directory in the Jenkins home directory on the controller file system.\n\nThis form validation method requires the appropriate permission in Email Extension Plugin 2.96.1.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/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:email-ext"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.96.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-32979"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2023-05-16/#SECURITY-3088%20(1)"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-732" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-05-17T02:59:02Z",
    "nvd_published_at" : "2023-05-16T16:15:10Z"
  }
}