CVE-2023-32985: Sidebar link Path Traversal Vulnerability

MODERATE
Advisory Identifier: GHSA-pp8m-prr7-wr8w
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CVSS 4.3
CWE-22
Published
Advisory Summary

CVE-2023-32985 is a MODERATE (CVSS 4.3) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Sidebar link libraries in the Maven ecosystem. The issue involves jenkins sidebar link plugin vulnerable to path traversal. Remediation is available by upgrading affected packages to version 2.2.2.

CVE-2023-32985 at a Glance

CVE Identifier CVE-2023-32985
GHSA Identifier GHSA-pp8m-prr7-wr8w
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Sidebar link
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-2023-32985

To remediate this vulnerability, upgrade all affected Sidebar link 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:sidebar-link fixed: 2.2.2 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>sidebar-link</artifactId>
    <version>2.2.2</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-2023-32985, 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 Sidebar link in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.2.2), 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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Sidebar link, 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 Sidebar Link Plugin allows specifying files in the `userContent/` directory for use as link icons. Sidebar Link Plugin 2.2.1 and earlier does not restrict the path of files in a method implementing form validation. This allows attackers with Overall/Read permission to check for the existence of an attacker-specified file path on the Jenkins controller file system. Sidebar Link Plugin 2.2.2 ensures that only files located within the expected `userContent/` directory can be accessed.

CVE-2023-32985 Affected Sidebar link Versions

1 component(s)
Fixed Versions:
2.2.2
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:sidebar-link
maven/org.jenkins-ci.plugins/sidebar-link
Maven
< 2.2.2
2.2.2

References

NVD — CVE-2023-32985 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-32985
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/sidebar-link-plugin/commit/1bfd878ee107cdf349bc6a6bf3e9e6e25ef95ad5
Sidebar link Security Information SECURITY
https://www.jenkins.io/security/advisory/2023-05-16/#SECURITY-3125

Frequently Asked Questions

What is CVE-2023-32985?
CVE-2023-32985 is a security vulnerability in Sidebar link involving Jenkins Sidebar Link Plugin vulnerable to Path Traversal under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Sidebar link versions are affected?
Affected versions include releases prior to 2.2.2 across affected packages: org.jenkins-ci.plugins:sidebar-link.
What version fixes CVE-2023-32985?
Upgrading to 2.2.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is sidebar-link affected?
Yes, org.jenkins-ci.plugins:sidebar-link is affected in releases prior to 2.2.2. Upgrade your dependency to 2.2.2 or later.
What is the CVSS score of CVE-2023-32985?
CVE-2023-32985 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-2023-32985?
CVE-2023-32985 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check Maven dependencies for CVE-2023-32985?
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-pp8m-prr7-wr8w",
  "modified" : "2023-05-17T03:23:08Z",
  "published" : "2023-05-16T18:30:16Z",
  "aliases" : [ "CVE-2023-32985" ],
  "summary" : "Jenkins Sidebar Link Plugin vulnerable to Path Traversal",
  "details" : "Jenkins Sidebar Link Plugin allows specifying files in the `userContent/` directory for use as link icons.\n\nSidebar Link Plugin 2.2.1 and earlier does not restrict the path of files in a method implementing form validation.\n\nThis allows attackers with Overall/Read permission to check for the existence of an attacker-specified file path on the Jenkins controller file system.\n\nSidebar Link Plugin 2.2.2 ensures that only files located within the expected `userContent/` directory can be accessed.",
  "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:sidebar-link"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.2.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-32985"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/sidebar-link-plugin/commit/1bfd878ee107cdf349bc6a6bf3e9e6e25ef95ad5"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2023-05-16/#SECURITY-3125"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-05-17T03:23:08Z",
    "nvd_published_at" : "2023-05-16T16:15:11Z"
  }
}