Vulnerability Note VU#475907

ShoreTel Mobility Client mobile application does not verify SSL certificates

Original Release date: 03 Jan 2017 | Last revised: 08 Feb 2017


ShoreTel Mobility Client for iOS and Android, version and earlier, fails to properly validate SSL certificates provided by HTTPS connections, which may enable an attacker to conduct man-in-the-middle (MITM) attacks.


CWE-295: Improper Certificate Validation - CVE-2016-6562

On iOS and Android devices, the ShoreTel Mobility Client app fails to properly validate SSL certificates provided by HTTPS connections, which means that an attacker in the position to perform MITM attacks may be able to obtain sensitive account information such as login credentials.


An attacker on the same network as the iOS device may be able to view or modify network traffic that should have been protected by HTTPS, which may lead to the exposure of sensitive account information, including login credentials.


Apply an update.

ShoreTel has released version for all devices to address the vulnerability.

If you are unable to update your application, please see the following workarounds:

Avoid untrusted networks

Avoid using untrusted networks, including public WiFi. Using your device on an untrusted network increases the chance of falling victim to a MITM attack.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
Shoretel Communications, Inc.Affected05 Oct 201621 Dec 2016
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base 7.8 AV:A/AC:L/Au:N/C:C/I:C/A:N
Temporal 7.0 E:F/RL:W/RC:C
Environmental 1.8 CDP:ND/TD:L/CR:ND/IR:ND/AR:ND



Thanks to David Coomber for reporting this vulnerability.

This document was written by Trent Novelly.

Other Information

  • CVE IDs: CVE-2016-6562
  • Date Public: 03 Jan 2017
  • Date First Published: 03 Jan 2017
  • Date Last Updated: 08 Feb 2017
  • Document Revision: 20


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