CVE-2020-2186: Ec2 CSRF Vulnerability Vulnerability

LOW
Advisory Identifier: GHSA-w6hw-57jq-h7f5
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CVSS 3.1
CWE-352
Published
Advisory Summary

CVE-2020-2186 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 amazon ec2 plugin. Remediation is available by upgrading affected packages to version 1.50.2.

CVE-2020-2186 at a Glance

CVE Identifier CVE-2020-2186
GHSA Identifier GHSA-w6hw-57jq-h7f5
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:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/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 None (C:N)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2020-2186

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: 1.50.2 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>ec2</artifactId>
    <version>1.50.2</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-2020-2186, 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 1.50.2), 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 1.50.1 and earlier does not require POST requests in several HTTP endpoints, resulting in cross-site request forgery (CSRF) vulnerabilities. This allows an attacker to provision instances with an attacker-specified template ID. Amazon EC2 Plugin 1.50.2 now requires POST requests for the affected HTTP endpoints.

CVE-2020-2186 Affected Ec2 Versions

1 component(s)
Fixed Versions:
1.50.2
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:ec2
maven/org.jenkins-ci.plugins/ec2
Maven
< 1.50.2
1.50.2

References

NVD — CVE-2020-2186 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-2186
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/ec2-plugin/commit/4c9f03ae202e4730fd54eda40771fa4d3873e358
Ec2 Source Repository REPOSITORY
https://github.com/jenkinsci/ec2-plugin
Ec2 Security Information SECURITY
https://jenkins.io/security/advisory/2020-05-06/#SECURITY-1408
Ec2 Security Information SECURITY
http://www.openwall.com/lists/oss-security/2020/05/06/3

Frequently Asked Questions

What is CVE-2020-2186?
CVE-2020-2186 is a security vulnerability in Ec2 involving CSRF vulnerability in Amazon EC2 Plugin under CWE-352: Cross-Site Request Forgery (CSRF).
Which Ec2 versions are affected?
Affected versions include releases prior to 1.50.2 across affected packages: org.jenkins-ci.plugins:ec2.
What version fixes CVE-2020-2186?
Upgrading to 1.50.2 (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 1.50.2. Upgrade your dependency to 1.50.2 or later.
What is the CVSS score of CVE-2020-2186?
CVE-2020-2186 has a CVSS v3.1 base score of 3.1 (LOW) with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2020-2186?
CVE-2020-2186 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-2020-2186?
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-w6hw-57jq-h7f5",
  "modified" : "2022-12-16T22:55:34Z",
  "published" : "2022-05-24T17:17:14Z",
  "aliases" : [ "CVE-2020-2186" ],
  "summary" : "CSRF vulnerability in Amazon EC2 Plugin",
  "details" : "Amazon EC2 Plugin 1.50.1 and earlier does not require POST requests in several HTTP endpoints, resulting in cross-site request forgery (CSRF) vulnerabilities. This allows an attacker to provision instances with an attacker-specified template ID.\n\nAmazon EC2 Plugin 1.50.2 now requires POST requests for the affected HTTP endpoints.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/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" : "1.50.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.50.1"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-2186"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/ec2-plugin/commit/4c9f03ae202e4730fd54eda40771fa4d3873e358"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/ec2-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2020-05-06/#SECURITY-1408"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2020/05/06/3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-352" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-16T22:55:34Z",
    "nvd_published_at" : "2020-05-06T13:15:00Z"
  }
}