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Poly Systems - Microsoft Azure Active Directory Privilege Escalation Impact

Microsoft announced a risk of privilege escalation in an insecure anti-pattern used in Azure Active Directory, where the use of the email claim from the access tokens for authorization can lead to an escalation of privilege and data leakage if email lookup is used.

Advisory ID

PLYGN23-04

Initial public release

8/14/2023

Last update

8/14/2023

Category

Poly

Summary

An analysis of the Poly systems determined the Polycom Device Management for Service Providers used the vulnerable email claim from the access tokens for authorization. The links provided below highlight the vulnerability in detail and it is recommended that impacted customers review these resources for a better understanding of the vulnerability.

https://msrc.microsoft.com/blog/2023/06/potential-risk-of-privilege-escalation-in-azure-ad-applications/

https://www.crowdstrike.com/blog/noauth-microsoft-azure-ad-vulnerability/

Resolution

The recommended remediation efforts provided by Microsoft to mitigate this vulnerability are applied in the solution steps provided. HP/Poly recommends customers follow the guidelines outlined below to remediate the vulnerability and ensure the security of the PDMS-SP.

There is no workaround, it is recommended to follow the solution provided below.

Customers should log out and log back into all their existing SSO users on the PDMS-SP system.

During the next SSO login, the PDMS-SP system will migrate the user’s identity from “email” to a more secure Azure “id_token”

There are two ways to enforce SSO user login through Azure AD:

  1. Run the revoke-MgUserSignInSession PowerShell command to revoke all refresh tokens of PDMS-SP users under the Azure AD account. OR

  2. Select "Revoke Session" on the user profile page in the Azure portal to revoke the user's session .

Revision history

This document has been revised according to the following information.

List of versions

Version

Description

Date

1.0

Initial release

8/14/2023

Additional information

Follow these links for additional information.

Third-party security patches

Third-party security patches that are to be installed on systems running Poly software products should be applied in accordance with the customer's patch management policy.

Contact

Any customer using an affected system who is concerned about this vulnerability within their deployment should contact Poly Technical Support(888) 248-4143, (916) 928-7561, or visit the Poly Support Site.

Security bulletin archive

To view released Security Bulletins, visit https://support.hp.com/security-bulletins.

It is strongly recommended that security related information being communicated to HP be encrypted using PGP, especially exploit information.

Download HP’s security-alert PGP key

Legal information

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