-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
Continental AG Infineon S-Gold 2 (PMB 8876)
28 July 2017
AusCERT Security Bulletin Summary
Product: Continental AG Infineon S-Gold 2
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2017-9647 CVE-2017-9633
- --------------------------BEGIN INCLUDED TEXT--------------------
Continental AG Infineon S-Gold 2 (PMB 8876)
Original release date: July 27, 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 8.8
ATTENTION: Remotely exploitable/low skill level to exploit. Public exploits
Vendor: Continental AG
Equipment: Infineon S-Gold 2 (PMB 8876)
Vulnerabilities: Stack-Based Buffer Overflow, Improper Restriction of
Operations within the Bounds of a Memory Buffer
All telematics control modules (TCUs) built by Continental AG that contain
the S-Gold 2 (PMB 8876) cellular baseband chipset are affected. The S-Gold 2
(PMB 8876) is found in the following vehicles:
BMW several models produced between 2009-2010
Ford - program to update 2G modems has been active since 2016 and
impact is restricted to the limited number of P-HEV vehicles equipped
with this older technology that remain in service.
Infiniti 2013 JX35
Infiniti 2014-2016 QX60
Infiniti 2014-2016 QX60 Hybrid
Infiniti 2014-2015 QX50
Infiniti 2014-2015 QX50 Hybrid
Infiniti 2013 M37/M56
Infiniti 2014-2016 Q70
Infiniti 2014-2016 Q70L
Infiniti 2015-2016 Q70 Hybrid
Infiniti 2013 QX56
Infiniti 2014-2016 QX 80
Nissan 2011-2015 Leaf
Successful exploitation of these vulnerabilities could allow a remote
attacker to execute arbitrary code. This may allow an attacker to disable
the infotainment system of the vehicle and affect functional features of
the vehicle. According to affected auto manufacturers, these vulnerabilities
do not directly affect the critical safety features of the vehicle.
Continental has validated the reported vulnerabilities but has not yet
identified a mitigation plan.
Nissan and Infiniti have issued Technical Service Bulletins (TSB)
asking dealers to advise customers of the issue and offer a free 2G
TCU deactivation. Nissan/Infiniti's 2G cellular service provider no
longer provides 2G services in the U.S. The subject 2G TCUs are no longer
connected to telematics services and no longer perform any function in the
affected vehicles. Nissan/Infiniti have stated that this campaign is being
performed out of abundance of caution to help safeguard against potential
Nissan/Infiniti proposes that users contact their local Infiniti or Nissan
dealers to have the subject 2G TCUs deactivated free of charge.
BMW has validated the vulnerabilities and will be offering a service
measure to affected customers.
Ford, since 2016, has had a customer satisfaction program to update or
disable legacy 2G modems and there are a limited number of vehicles left on
the market. Ford is reviewing the researcher's findings through internal
processes and evaluating the need for any additional steps.
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.
Stack-based buffer overflow CWE-121
An attacker with a physical connection to the TCU may exploit a buffer
overflow condition that exists in the processing of AT commands. This may
allow arbitrary code execution on the baseband radio processor of the TCU.
CVE-2017-9647 has been assigned to this vulnerability. A CVSS v3
base score of 6.8 has been assigned; the CVSS vector string is
IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER
A vulnerability in the temporary mobile subscriber identity (TMSI) may
allow an attacker to access and control memory. This may allow remote code
execution on the baseband radio processor of the TCU.
CVE-2017-9633 has been assigned to this vulnerability. A CVSS v3
base score of 8.8 has been assigned; the CVSS vector string is
Mickey Shkatov, Jesse Michael, and Oleksandr Bazhaniuk of the Advanced
Threat Research Team at McAfee have reported the vulnerabilities.
Critical Infrastructure Sector: Transportation Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Germany
For any questions related to this report, please contact ICS-CERT at:
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900
For industrial control systems security information and incident reporting:
ICS-CERT continuously strives to improve its products and services. You
can help by choosing one of the links below to provide feedback about
- --------------------------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 email@example.com
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:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: firstname.lastname@example.org
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-----
-----END PGP SIGNATURE-----