-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.1042
              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
                   Android
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: 
   https://ics-cert.us-cert.gov/advisories/ICSA-17-115-03

- --------------------------BEGIN INCLUDED TEXT--------------------

Advisory (ICSA-17-115-03)

Hyundai Motor America Blue Link

Original release date: April 25, 2017

All information products included in http://ics-cert.us-cert.gov are provided
"as is" for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this
product is governed by the Traffic Light Protocol (TLP) marking in the
header. For more information about TLP, see http://www.us-cert.gov/tlp/.

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

AFFECTED PRODUCTS

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.

IMPACT

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.

MITIGATION

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
https://community.rapid7.com/community/infosec/blog/2017/04/25/r7-2017-02-hyundai-blue-link-potential-info-disclosure-fixed
(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.

VULNERABILITY OVERVIEW

MAN-IN-THE-MIDDLE CWE-300

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

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
(AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N).

USE OF HARD-CODED CRYPTOGRAPHIC KEY CWE-321

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
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

RESEARCHER

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

BACKGROUND

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:
http://ics-cert.us-cert.gov

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=xaS7
-----END PGP SIGNATURE-----