Poly along with several ITSPs have detected an increase in the number of attacks and reconnaissance efforts against VoIP provisioning services
Attackers are programmatically attacking provisioning services utilizing different vectors attempting to exploit potential weaknesses in the provisioning service to extract service provider provisioning information. In some attacks, the attackers are impersonating legitimate VoIP devices. When successful, the attackers may use this information to commit toll-fraud, caller ID spoofing and SPAM over Internet Telephony (SPIT), launch Denial of Service (DoS) attacks or use the information gathered in other fraudulent VoIP activities.
Last Update: 3/9/2022
Initial Public Release: 2/24/2021
Advisory ID: PLYGN21-03
One of the best protections against the type of attack is to implement subscriber device authentication using a combination of MAC address authentication and digital certificate Common Name Validation. While this cannot prevent a specific compromised phone from obtaining credentials, it does help prevent an attack vector that uses a single compromised device to attempt to extract information for multiple phones.
There is no workaround.
©2022 Plantronics, Inc. All rights reserved.
Poly, the propeller design, and the Poly logo are trademarks of Plantronics, Inc. All other trademarks are property of their respective owners. No portion hereof may be reproduced or transmitted in any form or by any means, for any purpose other than the recipient's personal use, without the express written permission of Poly.
While Poly uses reasonable efforts to include accurate and up-to-date information in this document, Poly makes no warranties or representations as to its accuracy. Poly assumes no liability or responsibility for any typographical errors, out of date information, or any errors or omissions in the content of this document. Poly reserves the right to change or update this document at any time. Individuals are solely responsible for verifying that they have and are using the most recent Technical Bulletin.
Limitation of Liability
Poly and/or its respective suppliers make no representations about the suitability of the information contained in this document for any purpose. Information is provided "as is" without warranty of any kind and is subject to change without notice. The entire risk arising out of its use remains with the recipient. In no event shall Poly and/or its respective suppliers be liable for any direct, consequential, incidental, special, punitive, or other damages whatsoever (including without limitation, damages for loss of business profits, business interruption, or loss of business information), even if Poly has been advised of the possibility of such damages.