CVE-2020-2090: Ec2 CSRF Vulnerability Vulnerability

LOW
Advisory Identifier: GHSA-9hvf-pfq3-7pp6
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CVSS 3.1
CWE-352
Published
Advisory Summary

CVE-2020-2090 is a LOW (CVSS 3.1) csrf vulnerability vulnerability (CWE-352: Cross-Site Request Forgery (CSRF)) affecting Ec2 libraries in the Maven ecosystem. The issue involves csrf vulnerability in jenkins amazon ec2 plugin. Remediation is available by upgrading affected packages to version 1.48.

CVE-2020-2090 at a Glance

CVE Identifier CVE-2020-2090
GHSA Identifier GHSA-9hvf-pfq3-7pp6
Severity LOW
CVSS v3.1 Base Score 3.1
CWE Classification CWE-352: Cross-Site Request Forgery (CSRF)
Affected Product Ec2
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:L/UI:N/S:U/C:N/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
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-2020-2090

To remediate this vulnerability, upgrade all affected Ec2 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:ec2 fixed: 1.48 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>ec2</artifactId>
    <version>1.48</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-2020-2090, 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 Ec2 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.48), 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-352: Cross-Site Request Forgery (CSRF), where the web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor. In Ec2, 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

Amazon EC2 Plugin 1.47 and earlier does not perform permission checks in methods performing form validation. This allows users with Overall/Read access to Jenkins to connect to an attacker-specified URL within the AWS region using attacker-specified credentials IDs obtained through another method. This vulnerability might also allow attackers to capture credentials stored in Jenkins. We have not been able to confirm that this is possible. Additionally, these form validation methods do not require POST requests, resulting in a CSRF vulnerability. Amazon EC2 Plugin 1.48 requires POST requests and Overall/Administer permission for the affected form validation methods.

CVE-2020-2090 Affected Ec2 Versions

1 component(s)
Fixed Versions:
1.48
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:ec2
maven/org.jenkins-ci.plugins/ec2
Maven
< 1.48
1.48

References

NVD — CVE-2020-2090 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-2090
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/ec2-plugin/commit/0cdbaf2d7da5c368209f427559c8608dec22a63b
Ec2 Source Repository REPOSITORY
https://github.com/jenkinsci/ec2-plugin
Ec2 Security Information SECURITY
https://jenkins.io/security/advisory/2020-01-15/#SECURITY-1004

Frequently Asked Questions

What is CVE-2020-2090?
CVE-2020-2090 is a security vulnerability in Ec2 involving CSRF vulnerability in Jenkins Amazon EC2 Plugin under CWE-352: Cross-Site Request Forgery (CSRF).
Which Ec2 versions are affected?
Affected versions include releases prior to 1.48 across affected packages: org.jenkins-ci.plugins:ec2.
What version fixes CVE-2020-2090?
Upgrading to 1.48 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ec2 affected?
Yes, org.jenkins-ci.plugins:ec2 is affected in releases prior to 1.48. Upgrade your dependency to 1.48 or later.
What is the CVSS score of CVE-2020-2090?
CVE-2020-2090 has a CVSS v3.1 base score of 3.1 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2020-2090?
CVE-2020-2090 is classified under CWE-352: Cross-Site Request Forgery (CSRF) (The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.).
How can I check Maven dependencies for CVE-2020-2090?
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-9hvf-pfq3-7pp6",
  "modified" : "2022-12-21T16:37:12Z",
  "published" : "2022-05-24T17:06:22Z",
  "aliases" : [ "CVE-2020-2090" ],
  "summary" : "CSRF vulnerability in Jenkins Amazon EC2 Plugin",
  "details" : "Amazon EC2 Plugin 1.47 and earlier does not perform permission checks in methods performing form validation. This allows users with Overall/Read access to Jenkins to connect to an attacker-specified URL within the AWS region using attacker-specified credentials IDs obtained through another method.\n\nThis vulnerability might also allow attackers to capture credentials stored in Jenkins. We have not been able to confirm that this is possible.\n\nAdditionally, these form validation methods do not require POST requests, resulting in a CSRF vulnerability.\n\nAmazon EC2 Plugin 1.48 requires POST requests and Overall/Administer permission for the affected form validation methods.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:ec2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.48"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-2090"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/ec2-plugin/commit/0cdbaf2d7da5c368209f427559c8608dec22a63b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/ec2-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2020-01-15/#SECURITY-1004"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-352" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-21T16:37:12Z",
    "nvd_published_at" : "2020-01-15T16:15:00Z"
  }
}