HDX - IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE
Insert the Vulnerability Summary here.Poly HDX video endpoints (all models) are vulnerable to XML External Entity (XXE) manipulations, which could be used by a malicious party to deny service to the web interface of the HDX system.
- Severity
-
High
- Advisory ID
-
PLYTV16-04
- Initial public release
-
6/29/2016
- Last update
-
3/11/2022
- Category
-
Poly
Summary
This XXE vulnerability exploits a capability in XML DTDs (Document Type Definitions) that allows the creation of custom macros or entities. By recursively defining custom entities at the top of a document, an attacker can overwhelm the XML parser, preventing legitimate web traffic from being processed.
Poly would like to thank Vincent Hutsebaut of NCIRC for reporting security vulnerabilities to us and for their coordinated disclosure.
Resolution
Poly recommends customers upgrade to firmware build 3.1.10 or later.
For customers who cannot immediately upgrade to a non-vulnerable HDX system software version, the most effect means to mitigate this vulnerability is to limit access to the web interface of the HDX to only trusted users. The vulnerable component is only accessible to HDX administrators via the web.
The HDX console does not suffer from lack of responsiveness similar to the web interface, so system recovery is possible through the console interface. In addition, we recommend administrators follow standard best practices and change all default passwords and restrict network web access to the HDX unit using firewalls and whitelists.
.
Affected products
Identify the affected products for this issue.
|
Product |
Firmware |
Fix |
|---|---|---|
|
HCX 4000 |
Prior to 3.1.9 |
3.1.10 and above |
|
HDX 6000 |
Prior to 3.1.9 |
3.1.10 and above |
|
HDX 7000 |
Prior to 3.1.9 |
3.1.10 and above |
|
HDX 8000 |
Prior to 3.1.9 |
3.1.10 and above |
|
HDX 9000 |
Prior to 3.1.9 |
3.1.10 and above |
Revision history
This document has been revised according to the following information.
|
Version |
Description |
Date |
|---|---|---|
|
2.0 |
Format Changes |
3/11/2022 |
|
1.0 |
Original Publication |
6/29/2016 |
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.
Legal information
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DisclaimerWhile 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 LiabilityPoly 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.
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