CVE-2020-2139: Cobertura Arbitrary File Write Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-m935-chfp-9f63
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CVSS 6.5
CWE-22
Published
Advisory Summary

CVE-2020-2139 is a MODERATE (CVSS 6.5) arbitrary file write vulnerability vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Cobertura libraries in the Maven ecosystem. The issue involves arbitrary file write vulnerability in jenkins cobertura plugin. Remediation is available by upgrading affected packages to version 1.16.

CVE-2020-2139 at a Glance

CVE Identifier CVE-2020-2139
GHSA Identifier GHSA-m935-chfp-9f63
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Cobertura
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:L/UI:N/S:U/C:N/I:H/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 None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2020-2139

To remediate this vulnerability, upgrade all affected Cobertura 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:cobertura fixed: 1.16 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>cobertura</artifactId>
    <version>1.16</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-2020-2139, 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 Cobertura in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.16), 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 Cobertura, 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

An arbitrary file write vulnerability in Jenkins Cobertura Plugin 1.15 and earlier allows attackers able to control the coverage report file contents to overwrite any file on the Jenkins master file system. Cobertura Plugin 1.16 sanitizes the file paths to prevent escape from the base directory.

CVE-2020-2139 Affected Cobertura Versions

1 component(s)
Fixed Versions:
1.16
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:cobertura
maven/org.jenkins-ci.plugins/cobertura
Maven
< 1.16
1.16

References

NVD — CVE-2020-2139 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-2139
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/cobertura-plugin/commit/ea41b3f86a24ab398a588bde6a4eada869bed391
Cobertura Source Repository REPOSITORY
https://github.com/jenkinsci/cobertura-plugin
Cobertura Security Information SECURITY
https://jenkins.io/security/advisory/2020-03-09/#SECURITY-1668
Cobertura Security Information SECURITY
http://www.openwall.com/lists/oss-security/2020/03/09/1

Frequently Asked Questions

What is CVE-2020-2139?
CVE-2020-2139 is a security vulnerability in Cobertura involving Arbitrary file write vulnerability in Jenkins Cobertura Plugin under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Cobertura versions are affected?
Affected versions include releases prior to 1.16 across affected packages: org.jenkins-ci.plugins:cobertura.
What version fixes CVE-2020-2139?
Upgrading to 1.16 (or the latest patched release for your respective branch) resolves the vulnerability.
Is cobertura affected?
Yes, org.jenkins-ci.plugins:cobertura is affected in releases prior to 1.16. Upgrade your dependency to 1.16 or later.
What is the CVSS score of CVE-2020-2139?
CVE-2020-2139 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2020-2139?
CVE-2020-2139 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-2020-2139?
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-m935-chfp-9f63",
  "modified" : "2023-01-05T20:25:34Z",
  "published" : "2022-05-24T17:10:27Z",
  "aliases" : [ "CVE-2020-2139" ],
  "summary" : "Arbitrary file write vulnerability in Jenkins Cobertura Plugin",
  "details" : "An arbitrary file write vulnerability in Jenkins Cobertura Plugin 1.15 and earlier allows attackers able to control the coverage report file contents to overwrite any file on the Jenkins master file system. Cobertura Plugin 1.16 sanitizes the file paths to prevent escape from the base directory.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:cobertura"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.16"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.15"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-2139"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/cobertura-plugin/commit/ea41b3f86a24ab398a588bde6a4eada869bed391"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/cobertura-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2020-03-09/#SECURITY-1668"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2020/03/09/1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-01-05T20:25:34Z",
    "nvd_published_at" : "2020-03-09T16:15:00Z"
  }
}