NPM Access Token (fine-grained)

ID: npm-access-token

Severity: high

Author: DhiyaneshDK

Tags: npm,token,exposure

Description

YAML Source

id: npm-access-token

info:
  name: NPM Access Token (fine-grained)
  author: DhiyaneshDK
  severity: high
  reference:
    - https://github.com/praetorian-inc/noseyparker/blob/main/crates/noseyparker/data/default/builtin/rules/npm.yml
    - https://docs.npmjs.com/about-access-tokens
    - https://github.com/github/roadmap/issues/557
    - https://github.blog/changelog/2022-12-06-limit-scope-of-npm-tokens-with-the-new-granular-access-tokens/
  metadata:
    verified: true
    max-request: 1
  tags: npm,token,exposure

flow: http(1) && http(2)

http:
  - method: GET
    path:
      - "{{BaseURL}}"

    matchers:
      - type: regex
        part: body
        name: token
        regex:
          - "(npm_[A-Za-z0-9]{36})"
        internal: true

  - raw:
      - |
        @Host: https://registry.npmjs.org:443
        GET /-/whoami HTTP/1.1
        Host: registry.npmjs.org
        Authorization: Bearer {{token}}

    disable-path-automerge: true
    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(body, "username")'
          - 'contains(content_type, "application/json")'
        condition: and

    extractors:
      - type: dsl
        dsl:
          - token
# digest: 490a00463044022008c751d46d0c997be9534bf1613325bba21704115a09f54d2c076f673215c20402202647f89c8e9a5496e0a63e338627df76649680334046673fb3b4eb9a5a65f79f:922c64590222798bb761d5b6d8e72950

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.

$ nuclei -u "URL" -t "http/exposures/tokens/npm/npm-access-token.yaml"

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