CVE-2021-21627: Libvirt slave CSRF Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-mm5c-7mpr-99fm
Share
CVSS 8.8
CWE-352
Published
Advisory Summary

CVE-2021-21627 is a HIGH (CVSS 8.8) csrf vulnerability vulnerability (CWE-352: Cross-Site Request Forgery (CSRF)) affecting Libvirt slave libraries in the Maven ecosystem. The issue involves csrf vulnerability in jenkins libvirt agents plugin. Remediation is available by upgrading affected packages to version 1.9.1.

CVE-2021-21627 at a Glance

CVE Identifier CVE-2021-21627
GHSA Identifier GHSA-mm5c-7mpr-99fm
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-352: Cross-Site Request Forgery (CSRF)
Affected Product Libvirt slave
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.8

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

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

How to Fix CVE-2021-21627

To remediate this vulnerability, upgrade all affected Libvirt slave 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:libvirt-slave fixed: 1.9.1 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>libvirt-slave</artifactId>
    <version>1.9.1</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-2021-21627, 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 Libvirt slave in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.9.1), 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-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 Libvirt slave, 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 Libvirt Agents Plugin 1.9.0 and earlier does not require POST requests for a form submission endpoint, resulting in a cross-site request forgery (CSRF) vulnerability. This vulnerability allows attackers to stop hypervisor domains. Jenkins Libvirt Agents Plugin 1.9.1 requires POST requests for the affected HTTP endpoint.

CVE-2021-21627 Affected Libvirt slave Versions

1 component(s)
Fixed Versions:
1.9.1
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:libvirt-slave
maven/org.jenkins-ci.plugins/libvirt-slave
Maven
< 1.9.1
1.9.1

References

NVD — CVE-2021-21627 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21627
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/libvirt-slave-plugin/commit/655eab9bde26e8b8e11034f6c405af374564cae7
Libvirt slave Source Repository REPOSITORY
https://github.com/jenkinsci/libvirt-slave-plugin
Libvirt slave Security Information SECURITY
https://www.jenkins.io/security/advisory/2021-03-18/#SECURITY-1764
Libvirt slave Security Information SECURITY
http://www.openwall.com/lists/oss-security/2021/03/18/5

Frequently Asked Questions

What is CVE-2021-21627?
CVE-2021-21627 is a security vulnerability in Libvirt slave involving CSRF vulnerability in Jenkins Libvirt Agents Plugin under CWE-352: Cross-Site Request Forgery (CSRF).
Which Libvirt slave versions are affected?
Affected versions include releases prior to 1.9.1 across affected packages: org.jenkins-ci.plugins:libvirt-slave.
What version fixes CVE-2021-21627?
Upgrading to 1.9.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is libvirt-slave affected?
Yes, org.jenkins-ci.plugins:libvirt-slave is affected in releases prior to 1.9.1. Upgrade your dependency to 1.9.1 or later.
What is the CVSS score of CVE-2021-21627?
CVE-2021-21627 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-21627?
CVE-2021-21627 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-2021-21627?
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-mm5c-7mpr-99fm",
  "modified" : "2023-10-27T13:42:53Z",
  "published" : "2022-05-24T17:44:48Z",
  "aliases" : [ "CVE-2021-21627" ],
  "summary" : "CSRF vulnerability in Jenkins Libvirt Agents Plugin",
  "details" : "Jenkins Libvirt Agents Plugin 1.9.0 and earlier does not require POST requests for a form submission endpoint, resulting in a cross-site request forgery (CSRF) vulnerability.\n\nThis vulnerability allows attackers to stop hypervisor domains.\n\nJenkins Libvirt Agents Plugin 1.9.1 requires POST requests for the affected HTTP endpoint.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:libvirt-slave"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.9.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.9.0"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-21627"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/libvirt-slave-plugin/commit/655eab9bde26e8b8e11034f6c405af374564cae7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/libvirt-slave-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2021-03-18/#SECURITY-1764"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2021/03/18/5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-352" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-14T16:22:34Z",
    "nvd_published_at" : "2021-03-18T14:15:00Z"
  }
}