Application Enablement Services remote code execution (06-2017)

Original Release Date: June 12, 2017
Last Revised: December 26, 2017
Number: ASA-2017-088
Risk Level: High
Advisory Version: 3.0
Advisory Status: Final

1. Overview:

Avaya Aura® Application Enablement Services (AES) is a server-based software solution that provides an enhanced set of telephony APIs, protocols, Web Services, and direct IP access to media, and supports standards such as CSTA, JTAPI and TSAPI that expose Avaya Aura® Communication Manager features.

A security vulnerability is identified in Application Enablement Services. This vulnerability is rated as having a High security impact. The vulnerability would allow remote code execution if specially crafted messages are sent to the Application Enablement Services server.

Avaya has assigned the name AES-2017-1 to this vulnerability.

Avaya would like to thank Kyle Gaertner of Digital Defense, Inc for reporting this issue via ethical disclosure process.

2. Avaya System and Software-Only Products affected with affected packages installed:

Product: Affected Version(s): Risk Level: Actions:
Avaya Aura® Application Enablement Services 6.3.1, 6.3.2, 6.3.3, 7.x High For versions 6.3.1 and 6.3.2, upgrade to 6.3.3, install Super Patch 7 and apply AE Services 6.3.3.7 Security Hotfix as specified in PSN020297.
For 6.3.3, install Super Patch 7 and apply AE Services 6.3.3.7 Security Hotfix as specified in PSN020297.
For 7.0.x, upgrade to 7.0.1, install Super Patch 4 and apply AE Services 7.0.1.0.4 Security Hotfix as specified in PSN020297.
For 7.1, apply AE Services 7.1.0.0.0 Security Hotfix as specified in PSN020297.

Recommended Actions for System Products:
Avaya strongly recommends following networking and security best practices by implementing firewalls, ACLs, physical security or other appropriate access restrictions. Though Avaya believes such restrictions should always be in place, risk to Avaya products and the surrounding network from this potential vulnerability may be mitigated by ensuring these practices are implemented until such time as an Avaya provided product update or the recommended Avaya action is applied. Further restrictions as deemed necessary based on the customer's security policies may be required during this interim period, but the System Product operating system or application should not be modified unless the change is approved by Avaya. Making changes that are not approved may void the Avaya product service contract.

Mitigating Factors:

When determining risk, Avaya takes into account many factors as outlined by Avaya's Security Vulnerability Classification Policy. The following table describes factors that mitigate the risk of specific vulnerabilities for affected Avaya products:

Vulnerability Mitigating Factors
AES-2017-1 Vulnerability
This risk is rated High because exploiting this vulnerability would allow an unauthenticated user to send specially crafted messages to the server and gain privileged user access to it.

3. Additional Information:

Additional information may also be available via the Avaya support website and through your Avaya account representative. Please contact your Avaya product support representative, or dial 1-800-242-2121, with any questions.

4. Disclaimer:

ALL INFORMATION IS BELIEVED TO BE CORRECT AT THE TIME OF PUBLICATION, IS PROVIDED "AS IS", AND IS APPLICABLE ONLY TO PRODUCT VERSIONS ELIGIBLE FOR MANUFACTURER SUPPORT IN ACCORDANCE WITH AVAYA PRODUCT LIFE CYCLE POLICY. AVAYA INC., ON BEHALF ITSELF AND ITS SUBSIDIARIES AND AFFILIATES (HEREINAFTER COLLECTIVELY REFERRED TO AS "AVAYA"), DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND FURTHERMORE, AVAYA MAKES NO REPRESENTATIONS OR WARRANTIES THAT THE STEPS RECOMMENDED WILL ELIMINATE SECURITY OR VIRUS THREATS TO CUSTOMERS' SYSTEMS. IN NO EVENT SHALL AVAYA BE LIABLE FOR ANY DAMAGES WHATSOEVER ARISING OUT OF OR IN CONNECTION WITH THE INFORMATION OR RECOMMENDED ACTIONS PROVIDED HEREIN, INCLUDING DIRECT, INDIRECT, INCIDENTAL, STATUTORY, CONSEQUENTIAL DAMAGES, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF AVAYA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

THE INFORMATION PROVIDED HERE DOES NOT AFFECT THE SUPPORT AGREEMENTS IN PLACE FOR AVAYA PRODUCTS. SUPPORT FOR AVAYA PRODUCTS CONTINUES TO BE EXECUTED AS PER EXISTING AGREEMENTS WITH AVAYA.

5. Revision History:

V 1.0 - June 12, 2017 - Initial Statement issued.
V 2.0 - June 14, 2017 - Updated AES Affected Versions.
V 3.0 - December 26, 2017 - Set Advisory status to Final.

Avaya customers or Business Partners should report any security issues found with Avaya products via the standard support process.
Independent security researchers can contact Avaya at securityalerts@avaya.com.

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