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CERT Coordination Center


ThreatMetrix SDK for iOS fails to validate SSL certificates

Vulnerability Note VU#767208

Original Release Date: 2017-01-10 | Last Revised: 2017-01-11

Overview

On the iOS platform, the ThreatMetrix SDK versions prior to 3.2 fail to validate SSL certificates provided by HTTPS connections, which may allow an attacker to perform a man-in-the-middle (MITM) attack.

Description

ThreatMetrix is a security library for mobile applications, which aims to provide fraud prevention and device identity capabilities. The ThreatMetrix SDK versions prior to 3.2 do not validate SSL certificates on the iOS platform. An affected application will communicate with https://h-sdk.online-metrix.net, regardless of whether the connection is secure or not.

Impact

An attacker on the same network as or upstream from the iOS device may be able to view or modify ThreatMetrix network traffic that should have been protected by HTTPS.

Solution

Apply an update

This issue has been addressed in ThreatMetrix SDK versions 3.2 and later. Any iOS application that uses a vulnerable version of the ThreatMetrix SDK will need to be regenerated with an updated version of the library.

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

767208
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ThreatMetrix

Notified:  January 04, 2017 Updated:  January 10, 2017

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The "lack of SSL certificate validation" issue was resolved in our SDK version 3.2 and subsequent versions of our SDK.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base 4.8 AV:A/AC:L/Au:N/C:P/I:P/A:N
Temporal 4.0 E:F/RL:OF/RC:C
Environmental 3.9 CDP:ND/TD:ND/CR:ND/IR:ND/AR:ND

References

Credit

This vulnerability was reported by Will Dormann of the CERT/CC.

This document was written by Will Dormann.

Other Information

CVE IDs: CVE-2017-3182
Date Public: 2017-01-10
Date First Published: 2017-01-10
Date Last Updated: 2017-01-11 14:28 UTC
Document Revision: 11

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