Slack User token disclosure

ID: slack-user-token

Severity: high

Author: Ice3man,DhiyaneshDK

Tags: exposure,token,slack

Description

YAML Source

id: slack-user-token

info:
  name: Slack User token disclosure
  author: Ice3man,DhiyaneshDK
  severity: high
  reference:
    - https://github.com/praetorian-inc/noseyparker/blob/main/crates/noseyparker/data/default/builtin/rules/slack.yml
    - https://api.slack.com/methods/users.list/test
    - https://github.com/semgrep/semgrep-rules/blob/develop/generic/secrets/gitleaks/slack-user-token.yaml
    - https://github.com/semgrep/semgrep-rules/blob/develop/generic/secrets/gitleaks/slack-user-token.txt
  metadata:
    max-request: 1
    verified: true
  tags: exposure,token,slack

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

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

    matchers:
      - type: regex
        part: body
        name: token
        regex:
          - 'xoxp-[0-9A-Za-z\\-]{74}'
          - '(xox[pe](?:-[0-9]{10,13}){3}-[a-zA-Z0-9-]{28,34})'
        internal: true

  - raw:
      - |
        @Host: https://slack.com:443
        POST /api/users.list?pretty=1 HTTP/1.1
        Host: slack.com
        Origin: https://api.slack.com
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryDL3VHEC7cFaxeAhK

        ------WebKitFormBoundaryDL3VHEC7cFaxeAhK
        Content-Disposition: form-data; name="content"

        null
        ------WebKitFormBoundaryDL3VHEC7cFaxeAhK
        Content-Disposition: form-data; name="token"

        {{token}}
        ------WebKitFormBoundaryDL3VHEC7cFaxeAhK--

    matchers:
      - type: dsl
        dsl:
          - status_code == 200
          - contains_all(body, "is_admin", "is_app_user", "is_email_confirmed")
          - contains(content_type, "application/json")
        condition: and

    extractors:
      - type: dsl
        dsl:
          - token
# digest: 4b0a00483046022100de9135e609edc931f16437f65b2d2d819eab396d1c758f1272b01eaa614be77c0221009f86e0b107f43991f64bcb55cd1525e04a9e6c313d208d1b4a01c0db62bdb5e8:922c64590222798bb761d5b6d8e72950

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/slack/slack-user-token.yaml"

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