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HDX - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Vulnerability Summary

The Poly HDX telnet shell is vulnerable to a command shell authorization bypass. This vulnerability could be used by a malicious user to gain unauthorized access to the system and information disclosure. Poly made changes to the HDX software to address a race condition in the telnet authentication mechanism starting with the commercial software build to prevent this vulnerability.


Last Update: 3/4/2022
Initial Public Release: 5/7/2013
Advisory ID:  PLYTV13-06

Product Affected
HDX 4000
Prior to and above
HDX 6000

Prior to and above
HDX 7000

Prior to and above
HDX 8000
Prior to and above
HDX 9000
Prior to and above

Poly recommends customers upgrade to firmware build or later.



For customers who cannot upgrade to the fixed version, administrators can mitigate this vulnerability by disabling telnet on the HDX system.


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.



Poly would like to thank Paul Hass from Security-Assessment for reporting security vulnerabilities to us and for their coordinated disclosure.

Revision History
1.0 5/7/2013
Initial Release
2.0 3/4/2022
Format Changes

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