CVE-2020-2148: Mac Missing Permission Checks Vulnerability

MODERATE
Advisory Identifier: GHSA-2m74-x26c-g7xc
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CVSS 4.3
CWE-285 CWE-863
Published
Advisory Summary

CVE-2020-2148 is a MODERATE (CVSS 4.3) missing permission checks vulnerability (CWE-285: Improper Authorization) affecting Mac libraries in the Maven ecosystem. The issue involves missing permission checks in mac plugin. Remediation is available by upgrading affected packages to version 1.2.0.

CVE-2020-2148 at a Glance

CVE Identifier CVE-2020-2148
GHSA Identifier GHSA-2m74-x26c-g7xc
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-285: Improper Authorization
Affected Product Mac
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-2020-2148

To remediate this vulnerability, upgrade all affected Mac dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

fr.edf.jenkins.plugins:mac fixed: 1.2.0 
<dependency>
    <groupId>fr.edf.jenkins.plugins</groupId>
    <artifactId>mac</artifactId>
    <version>1.2.0</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=fr.edf.jenkins.plugins

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2020-2148, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=fr.edf.jenkins.plugins

Analyze the terminal output to locate any version of Mac in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.2.0), your application is affected.

Note: The mvn dependency:tree -Dincludes=fr.edf.jenkins.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-285: Improper Authorization, where the product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. In Mac, 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

A missing permission check in Jenkins Mac Plugin 1.1.0 and earlier allows attackers with Overall/Read permission to connect to an attacker-specified SSH server using attacker-specified credentials.

CVE-2020-2148 Affected Mac Versions

1 component(s)
Fixed Versions:
1.2.0
Product / Package Ecosystem Affected Versions Fixed Version
fr.edf.jenkins.plugins:mac
maven/fr.edf.jenkins.plugins/mac
Maven
< 1.2.0
1.2.0

References

NVD — CVE-2020-2148 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-2148
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/mac-plugin/commit/86aebd3d33526d83d6cbc9aef7fb1f4831fb1805
Mac Source Repository REPOSITORY
https://github.com/jenkinsci/mac-plugin
Mac Security Information SECURITY
https://jenkins.io/security/advisory/2020-03-09/#SECURITY-1761
Mac Security Information SECURITY
http://www.openwall.com/lists/oss-security/2020/03/09/1

Frequently Asked Questions

What is CVE-2020-2148?
CVE-2020-2148 is a security vulnerability in Mac involving Missing permission checks in Mac Plugin under CWE-285: Improper Authorization.
Which Mac versions are affected?
Affected versions include releases prior to 1.2.0 across affected packages: fr.edf.jenkins.plugins:mac.
What version fixes CVE-2020-2148?
Upgrading to 1.2.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mac affected?
Yes, fr.edf.jenkins.plugins:mac is affected in releases prior to 1.2.0. Upgrade your dependency to 1.2.0 or later.
What is the CVSS score of CVE-2020-2148?
CVE-2020-2148 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-2020-2148?
CVE-2020-2148 is classified under CWE-285: Improper Authorization (The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Maven dependencies for CVE-2020-2148?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=fr.edf.jenkins.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-2m74-x26c-g7xc",
  "modified" : "2023-01-14T05:24:51Z",
  "published" : "2022-05-24T17:10:29Z",
  "aliases" : [ "CVE-2020-2148" ],
  "summary" : "Missing permission checks in Mac Plugin",
  "details" : "A missing permission check in Jenkins Mac Plugin 1.1.0 and earlier allows attackers with Overall/Read permission to connect to an attacker-specified SSH server using attacker-specified credentials.",
  "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" : "fr.edf.jenkins.plugins:mac"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-2148"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/mac-plugin/commit/86aebd3d33526d83d6cbc9aef7fb1f4831fb1805"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/mac-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2020-03-09/#SECURITY-1761"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2020/03/09/1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-285", "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-01-14T05:24:51Z",
    "nvd_published_at" : "2020-03-09T16:15:00Z"
  }
}