CVE-2022-36883: Git Lack Of Authentication Mechanism Vulnerability

MODERATE
Advisory Identifier: GHSA-v878-67xw-grw2
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CVSS 6.5
CWE-862
Published
Advisory Summary

CVE-2022-36883 is a MODERATE (CVSS 6.5) lack of authentication mechanism vulnerability (CWE-862: Missing Authorization) affecting Git libraries in the Maven ecosystem. The issue involves lack of authentication mechanism in jenkins git plugin webhook. Remediation is available by upgrading affected packages to version 4.11.4.

CVE-2022-36883 at a Glance

CVE Identifier CVE-2022-36883
GHSA Identifier GHSA-v878-67xw-grw2
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-862: Missing Authorization
Affected Product Git
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.5

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:N/S:U/C:L/I:L/A:N).

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

How to Fix CVE-2022-36883

To remediate this vulnerability, upgrade all affected Git 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:git fixed: 4.11.4 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>git</artifactId>
    <version>4.11.4</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-2022-36883, 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 Git in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.11.4), 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 Git, 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

Git Plugin provides a webhook endpoint at `/git/notifyCommit` that can be used to notify Jenkins of changes to an SCM repository. For its most basic functionality, this endpoint receives a repository URL, and Jenkins will schedule polling for all jobs configured with the specified repository. In Git Plugin 4.11.3 and earlier, this endpoint can be accessed with GET requests and without authentication. In addition to this basic functionality, the endpoint also accept a `sha1` parameter specifying a commit ID. If this parameter is specified, jobs configured with the specified repo will be triggered immediately, and the build will check out the specified commit. Additionally, the output of the webhook endpoint will provide information about which jobs were triggered or scheduled for polling, including jobs the user has no permission to access. This allows attackers with knowledge of Git repository URLs to trigger builds of jobs using a specified Git repository and to cause them to check out an attacker-specified commit, and to obtain information about the existence of jobs configured with this Git repository. Git Plugin 4.11.4 requires a `token` parameter which will act as an authentication for the webhook endpoint. While GET requests remain allowed, attackers would need to be able to provide a webhook token. For more information see [the plugin documentation](https://github.com/jenkinsci/git-plugin/#push-notification-from-repository).

CVE-2022-36883 Affected Git Versions

1 component(s)
Fixed Versions:
4.11.4
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:git
maven/org.jenkins-ci.plugins/git
Maven
< 4.11.4
4.11.4

References

NVD — CVE-2022-36883 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-36883
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/git-plugin/commit/b46165c74a0bf15e08763de2e506005624d5d238
Git Source Repository REPOSITORY
https://github.com/jenkinsci/git-plugin
Git Security Information SECURITY
https://www.jenkins.io/security/advisory/2022-07-27/#SECURITY-284
Git Security Information SECURITY
http://www.openwall.com/lists/oss-security/2022/07/27/1

Frequently Asked Questions

What is CVE-2022-36883?
CVE-2022-36883 is a security vulnerability in Git involving Lack of authentication mechanism in Jenkins Git Plugin webhook under CWE-862: Missing Authorization.
Which Git versions are affected?
Affected versions include releases prior to 4.11.4 across affected packages: org.jenkins-ci.plugins:git.
What version fixes CVE-2022-36883?
Upgrading to 4.11.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is git affected?
Yes, org.jenkins-ci.plugins:git is affected in releases prior to 4.11.4. Upgrade your dependency to 4.11.4 or later.
What is the CVSS score of CVE-2022-36883?
CVE-2022-36883 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2022-36883?
CVE-2022-36883 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-2022-36883?
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-v878-67xw-grw2",
  "modified" : "2022-12-09T21:10:20Z",
  "published" : "2022-07-28T00:00:43Z",
  "aliases" : [ "CVE-2022-36883" ],
  "summary" : "Lack of authentication mechanism in Jenkins Git Plugin webhook",
  "details" : "Git Plugin provides a webhook endpoint at `/git/notifyCommit` that can be used to notify Jenkins of changes to an SCM repository. For its most basic functionality, this endpoint receives a repository URL, and Jenkins will schedule polling for all jobs configured with the specified repository. In Git Plugin 4.11.3 and earlier, this endpoint can be accessed with GET requests and without authentication. In addition to this basic functionality, the endpoint also accept a `sha1` parameter specifying a commit ID. If this parameter is specified, jobs configured with the specified repo will be triggered immediately, and the build will check out the specified commit. Additionally, the output of the webhook endpoint will provide information about which jobs were triggered or scheduled for polling, including jobs the user has no permission to access. This allows attackers with knowledge of Git repository URLs to trigger builds of jobs using a specified Git repository and to cause them to check out an attacker-specified commit, and to obtain information about the existence of jobs configured with this Git repository. Git Plugin 4.11.4 requires a `token` parameter which will act as an authentication for the webhook endpoint. While GET requests remain allowed, attackers would need to be able to provide a webhook token. For more information see [the plugin documentation](https://github.com/jenkinsci/git-plugin/#push-notification-from-repository).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:git"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.11.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.11.3"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-36883"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/git-plugin/commit/b46165c74a0bf15e08763de2e506005624d5d238"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/git-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2022-07-27/#SECURITY-284"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2022/07/27/1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-08-10T18:25:32Z",
    "nvd_published_at" : "2022-07-27T15:15:00Z"
  }
}