CVE-2021-21674: Requests Missing Permission Check Vulnerability

MODERATE
Advisory Identifier: GHSA-c4c3-3cgh-vvrh
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CVSS 4.3
CWE-862
Published
Advisory Summary

CVE-2021-21674 is a MODERATE (CVSS 4.3) missing permission check vulnerability (CWE-862: Missing Authorization) affecting Requests libraries in the Maven ecosystem. The issue involves missing permission check in jenkins requests-plugin plugin allows viewing pending requests. Remediation is available by upgrading affected packages to version 2.2.7.

CVE-2021-21674 at a Glance

CVE Identifier CVE-2021-21674
GHSA Identifier GHSA-c4c3-3cgh-vvrh
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-862: Missing Authorization
Affected Product Requests
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:L/I:N/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 Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2021-21674

To remediate this vulnerability, upgrade all affected Requests 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:requests fixed: 2.2.7 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>requests</artifactId>
    <version>2.2.7</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-2021-21674, 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 Requests in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.2.7), 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-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In Requests, 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 requests-plugin Plugin 2.2.6 and earlier does not perform a permission check in an HTTP endpoint. This allows attackers with Overall/Read permission to view the list of pending requests. Jenkins requests-plugin Plugin 2.2.7 requires Overall/Administer permission to view the list of pending requests. The previous sentence originally stated that Overall/Read permission was newly required. This statement was incorrect and has been fixed on 2021-07-05.

CVE-2021-21674 Affected Requests Versions

1 component(s)
Fixed Versions:
2.2.7
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:requests
maven/org.jenkins-ci.plugins/requests
Maven
< 2.2.7
2.2.7

References

NVD — CVE-2021-21674 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21674
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/requests-plugin/commit/eb8ae816bbe734203debe323c578adc41baac5f4
Requests Source Repository REPOSITORY
https://github.com/jenkinsci/requests-plugin
Requests Security Information SECURITY
https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-1995
Requests Security Information SECURITY
http://www.openwall.com/lists/oss-security/2021/06/30/1

Frequently Asked Questions

What is CVE-2021-21674?
CVE-2021-21674 is a security vulnerability in Requests involving Missing permission check in Jenkins requests-plugin Plugin allows viewing pending requests under CWE-862: Missing Authorization.
Which Requests versions are affected?
Affected versions include releases prior to 2.2.7 across affected packages: org.jenkins-ci.plugins:requests.
What version fixes CVE-2021-21674?
Upgrading to 2.2.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is requests affected?
Yes, org.jenkins-ci.plugins:requests is affected in releases prior to 2.2.7. Upgrade your dependency to 2.2.7 or later.
What is the CVSS score of CVE-2021-21674?
CVE-2021-21674 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:L/I:N/A:N.
What CWE is associated with CVE-2021-21674?
CVE-2021-21674 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Maven dependencies for CVE-2021-21674?
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-c4c3-3cgh-vvrh",
  "modified" : "2023-10-27T16:28:20Z",
  "published" : "2022-05-24T19:06:36Z",
  "aliases" : [ "CVE-2021-21674" ],
  "summary" : "Missing permission check in Jenkins requests-plugin Plugin allows viewing pending requests",
  "details" : "Jenkins requests-plugin Plugin 2.2.6 and earlier does not perform a permission check in an HTTP endpoint.\n\nThis allows attackers with Overall/Read permission to view the list of pending requests.\n\nJenkins requests-plugin Plugin 2.2.7 requires Overall/Administer permission to view the list of pending requests.\n\nThe previous sentence originally stated that Overall/Read permission was newly required. This statement was incorrect and has been fixed on 2021-07-05.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:requests"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.2.7"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.2.6"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-21674"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/requests-plugin/commit/eb8ae816bbe734203debe323c578adc41baac5f4"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/requests-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-1995"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2021/06/30/1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-16T15:18:35Z",
    "nvd_published_at" : "2021-06-30T17:15:00Z"
  }
}