Microsoft Exchange Autodiscover - User Enumeration
ID: ms-exchange-user-enum
Severity: info
Author: righettod
Tags: ms-exchange,microsoft,misconfig,enum
Description
Section titled “Description”Microsoft Exchange (on premise) is prone to a user enumeration via the ActiveSync protocol using the AutodiscoverV2 endpoint.
YAML Source
Section titled “YAML Source”id: ms-exchange-user-enum
info: name: Microsoft Exchange Autodiscover - User Enumeration author: righettod severity: info description: | Microsoft Exchange (on premise) is prone to a user enumeration via the ActiveSync protocol using the AutodiscoverV2 endpoint. reference: - https://www.msxfaq.de/exchange/autodiscover/autodiscover_v2.htm - https://github.com/righettod/toolbox-pentest-web/blob/master/docs/4-HINTS_ARCHIVED.md#user-enumeration-techniques-for-microsoft-exchange classification: cpe: cpe:2.3:a:microsoft:exchange_server:*:*:*:*:*:*:*:* metadata: verified: true max-request: 1 vendor: microsoft product: exchange_server shodan-query: http.title:outlook exchange tags: ms-exchange,microsoft,misconfig,enum
http: - method: GET path: - "{{BaseURL}}/autodiscover/autodiscover.json?Protocol=ActiveSync&Email={{rand_text_alpha(6)}}%40oast.pro&RedirectCount=1"
matchers-condition: and matchers: - type: word part: header words: - "/autodiscover/autodiscover.json?Email="
- type: status status: - 302
extractors: - type: regex part: header group: 1 regex: - '(?i)Email=([A-Za-z0-9@%.-_]+)'# digest: 4a0a00473045022100e02c24a5cad2b0bbe6e1fea6d5d108a0d6d15fbfa775fd41f01a26696c0524e502204ef46810c9ff1eb8aea8e608bcbaf58ce306a2c5c8dc85a7f337927aceb26573:922c64590222798bb761d5b6d8e72950Guide to check the vulnerabilities
Section titled “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/misconfiguration/ms-exchange-user-enum.yaml"