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             AUSCERT External Security Bulletin Redistribution

              ICSA-17-115-03 Hyundai Motor America Blue Link
                               26 April 2017


        AusCERT Security Bulletin Summary

Product:           Hyundai Blue Link
Publisher:         Hyundai
Operating System:  Apple iOS
Impact/Access:     Access Privileged Data         -- Remote/Unauthenticated
                   Provide Misleading Information -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-6054 CVE-2017-6052 

Original Bulletin: 

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Advisory (ICSA-17-115-03)

Hyundai Motor America Blue Link

Original release date: April 25, 2017

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CVSS v3 7.5

ATTENTION: Remotely exploitable

Vendor: Hyundai Motor America

Equipment: Blue Link

Vulnerability: Man-in-the-Middle, Use of Hard-Coded Cryptographic Key


The following versions of Blue Link, a mobile application for Hyundai
vehicle management, are affected:

    Blue Link Version 3.9.5, and
    Blue Link Version 3.9.4.


Successful exploitation of these vulnerabilities may allow a remote attacker
to gain access to insecurely transmitted sensitive information, which could
allow the attacker to locate, unlock, and start a vehicle associated with
the affected application.

Rapid7 working with Hyundai Motor America reports that it would be
difficult to impossible to conduct this attack at scale, since an attacker
would typically need to first subvert physically local networks, or gain
a privileged position on the network path from the app user to their
service instance.


Hyundai Motor America released Blue Link, Version 3.9.6, a mandatory update
to the application, which mitigates the aforementioned vulnerabilities on
March 6, 2017, for Android devices and March 8, 2017, for iOS devices.

Rapid7 has released a security advisory that can be found at
(link is external)

ICS-CERT reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.

ICS-CERT also provides a section for control systems security recommended
practices on the ICS-CERT web page. Several recommended practices are
available for reading and download, including Improving Industrial Control
Systems Cybersecurity with Defense-in-Depth Strategies.

Additional mitigation guidance and recommended practices are
publicly available in the ICS-CERT Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies, that is available for download from the ICS-CERT web site.

Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to ICS-CERT for
tracking and correlation against other incidents.

No known public exploits specifically target these vulnerabilities. High
skill level is needed to exploit.



Communication channel endpoints are not verified, which may allow a remote
attacker to access or influence communications between the identified

CVE-2017-6052 has been assigned to this vulnerability. A CVSS v3
base score of 4.6 has been assigned; the CVSS vector string is


The application uses a hard-coded decryption password to protect sensitive
user information.

CVE-2017-6054 has been assigned to this vulnerability. A CVSS v3
base score of 7.5 has been assigned; the CVSS vector string is


These vulnerabilities were discovered by Will Hatzer and Arjun Kumar
working with Rapid7.


Critical Infrastructure Sector(s): Transportation Systems

Countries/Areas Deployed: United States

Company Headquarters Location: Fountain Valley, California

Contact Information

For any questions related to this report, please contact ICS-CERT at:

Email: ics-cert@hq.dhs.gov (link sends e-mail)
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900

For industrial control systems security information and incident reporting:

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