CVE-2022-30948: Mercurial Path Traversal Vulnerability

LOW
Advisory Identifier: GHSA-5786-3qjg-mr88
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CVSS 3.7
CWE-22
Published
Advisory Summary

CVE-2022-30948 is a LOW (CVSS 3.7) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Mercurial libraries in the Maven ecosystem. The issue involves path traversal in jenkins mercurial plugin. Remediation is available by upgrading affected packages to version 2.16.1.

CVE-2022-30948 at a Glance

CVE Identifier CVE-2022-30948
GHSA Identifier GHSA-5786-3qjg-mr88
Severity LOW
CVSS v3.1 Base Score 3.7
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Mercurial
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 3.7

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

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
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-2022-30948

To remediate this vulnerability, upgrade all affected Mercurial 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:mercurial fixed: 2.16.1 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>mercurial</artifactId>
    <version>2.16.1</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-2022-30948, 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 Mercurial in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.16.1), 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-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 Mercurial, 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

SCMs support a number of different URL schemes, including local file system paths (e.g. using file: URLs). Historically in Jenkins, only agents checked out from SCM, and if multiple projects share the same agent, there is no expected isolation between builds besides using different workspaces unless overridden. Some Pipeline-related features check out SCMs from the Jenkins controller as well. This allows attackers able to configure pipelines to check out some SCM repositories stored on the Jenkins controller’s file system using local paths as SCM URLs, obtaining limited information about other projects' SCM contents

CVE-2022-30948 Affected Mercurial Versions

1 component(s)
Fixed Versions:
2.16.1
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:mercurial
maven/org.jenkins-ci.plugins/mercurial
Maven
< 2.16.1
2.16.1

References

NVD — CVE-2022-30948 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-30948
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/mercurial-plugin/commit/b995436e560b01818f5d9e9920990370cc575341
Mercurial Source Repository REPOSITORY
https://github.com/jenkinsci/mercurial-plugin
Mercurial Security Information SECURITY
https://www.jenkins.io/security/advisory/2022-05-17/#SECURITY-2478
Mercurial Security Information SECURITY
http://www.openwall.com/lists/oss-security/2022/05/17/8

Frequently Asked Questions

What is CVE-2022-30948?
CVE-2022-30948 is a security vulnerability in Mercurial involving Path traversal in Jenkins Mercurial Plugin under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Mercurial versions are affected?
Affected versions include releases prior to 2.16.1 across affected packages: org.jenkins-ci.plugins:mercurial.
What version fixes CVE-2022-30948?
Upgrading to 2.16.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mercurial affected?
Yes, org.jenkins-ci.plugins:mercurial is affected in releases prior to 2.16.1. Upgrade your dependency to 2.16.1 or later.
What is the CVSS score of CVE-2022-30948?
CVE-2022-30948 has a CVSS v3.1 base score of 3.7 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2022-30948?
CVE-2022-30948 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-2022-30948?
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-5786-3qjg-mr88",
  "modified" : "2022-12-02T21:05:31Z",
  "published" : "2022-05-18T00:00:39Z",
  "aliases" : [ "CVE-2022-30948" ],
  "summary" : "Path traversal in Jenkins Mercurial Plugin",
  "details" : "SCMs support a number of different URL schemes, including local file system paths (e.g. using file: URLs).\n\nHistorically in Jenkins, only agents checked out from SCM, and if multiple projects share the same agent, there is no expected isolation between builds besides using different workspaces unless overridden. Some Pipeline-related features check out SCMs from the Jenkins controller as well.\n\nThis allows attackers able to configure pipelines to check out some SCM repositories stored on the Jenkins controller’s file system using local paths as SCM URLs, obtaining limited information about other projects' SCM contents",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:mercurial"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.16.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.16"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-30948"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/mercurial-plugin/commit/b995436e560b01818f5d9e9920990370cc575341"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/mercurial-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2022-05-17/#SECURITY-2478"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2022/05/17/8"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-02T15:52:02Z",
    "nvd_published_at" : "2022-05-17T15:15:00Z"
  }
}