CVE-2020-2119: Azure ad Client Secret Transmitted Vulnerability

LOW
Advisory Identifier: GHSA-vvg2-hg3c-mqj3
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CVSS 3.1
CWE-522 CWE-256
Published
Advisory Summary

CVE-2020-2119 is a LOW (CVSS 3.1) client secret transmitted vulnerability (CWE-522: Insufficiently Protected Credentials) affecting Azure ad libraries in the Maven ecosystem. The issue involves client secret transmitted in plain text by azure ad plugin. Remediation is available by upgrading affected packages to version 1.2.0.

CVE-2020-2119 at a Glance

CVE Identifier CVE-2020-2119
GHSA Identifier GHSA-vvg2-hg3c-mqj3
Severity LOW
CVSS v3.1 Base Score 3.1
CWE Classification CWE-522: Insufficiently Protected Credentials
Affected Product Azure ad
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 3.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2020-2119

To remediate this vulnerability, upgrade all affected Azure ad 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:azure-ad fixed: 1.2.0 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>azure-ad</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=org.jenkins-ci.plugins

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2020-2119, 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 Azure ad 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=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-522: Insufficiently Protected Credentials, where the product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval. In Azure ad, 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

Azure AD Plugin stores a client secret in its global configuration. While the credential is stored encrypted on disk, it is transmitted in plain text as part of the configuration form by Azure AD Plugin 1.1.2 and earlier. This can result in exposure of the credential through browser extensions, cross-site scripting vulnerabilities, and similar situations. Azure AD Plugin 1.2.0 transmits the client secret in its global configuration encrypted.

CVE-2020-2119 Affected Azure ad Versions

1 component(s)
Fixed Versions:
1.2.0
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:azure-ad
maven/org.jenkins-ci.plugins/azure-ad
Maven
< 1.2.0
1.2.0

References

NVD — CVE-2020-2119 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-2119
Azure ad Source Repository REPOSITORY
https://github.com/jenkinsci/azure-ad-plugin
Azure ad Security Information SECURITY
https://jenkins.io/security/advisory/2020-02-12/#SECURITY-1717
Azure ad Security Information SECURITY
http://www.openwall.com/lists/oss-security/2020/02/12/3

Frequently Asked Questions

What is CVE-2020-2119?
CVE-2020-2119 is a security vulnerability in Azure ad involving Client secret transmitted in plain text by Azure AD Plugin under CWE-522: Insufficiently Protected Credentials.
Which Azure ad versions are affected?
Affected versions include releases prior to 1.2.0 across affected packages: org.jenkins-ci.plugins:azure-ad.
What version fixes CVE-2020-2119?
Upgrading to 1.2.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is azure-ad affected?
Yes, org.jenkins-ci.plugins:azure-ad 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-2020-2119?
CVE-2020-2119 has a CVSS v3.1 base score of 3.1 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2020-2119?
CVE-2020-2119 is classified under CWE-522: Insufficiently Protected Credentials (The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.).
How can I check Maven dependencies for CVE-2020-2119?
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-vvg2-hg3c-mqj3",
  "modified" : "2023-01-14T05:27:06Z",
  "published" : "2022-05-24T17:08:46Z",
  "aliases" : [ "CVE-2020-2119" ],
  "summary" : "Client secret transmitted in plain text by Azure AD Plugin",
  "details" : "Azure AD Plugin stores a client secret in its global configuration.\n\nWhile the credential is stored encrypted on disk, it is transmitted in plain text as part of the configuration form by Azure AD Plugin 1.1.2 and earlier. This can result in exposure of the credential through browser extensions, cross-site scripting vulnerabilities, and similar situations.\n\nAzure AD Plugin 1.2.0 transmits the client secret in its global configuration encrypted.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:azure-ad"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-2119"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/azure-ad-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2020-02-12/#SECURITY-1717"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2020/02/12/3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-256", "CWE-522" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-01-14T05:27:06Z",
    "nvd_published_at" : "2020-02-12T15:15:00Z"
  }
}