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-----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 iQIVAwUBWQA7QIx+lLeg9Ub1AQgn7g/+OIbmEdD3Ns5T5s5X0meXnQjkHS+6pXF4 U/c7IZpo64JCKgfyDG+IV1YoZh5j5JtsanwdU2hPytf0ig24ISITKpY3JjvVC8jn JxM7qixD47hzP2gLcJNHlG8biE1RxCpNYzXsdBBnoVYh0xLUQJJRlvyjfao6sRzG ZSRs+pKgH1K7sZKOrf9r4SsMMrR2IslIsoC9IwL6LF/2/efSs+SeaGCNUymHDgLM j4bUeFDl3zcUEbPFlBAd9giYZi3c4myfLJZUgVocK+8MvnsEsavnR7kEpbrGl0Oq EYnyVLaU6kwvgq6VfMp3Mqsjl4y9RRMg8ys0uGCF3ORRNBEzaR0Um5uYZ05OaKwd lLQc7+h3zzBIbuV31JMZawrQFHJ2wIYfQCpqu+uEGxigPSm5wpRiVzHYyTO0WyAj MsDyl/7lCYuCSMeMBrXdJzRuHzwDrl+ak97UGF9D6zYDd4EDEb4tCYui1UAp4OzY njwuKMRlQE6pv5uuphoK6OkbFjNmtebzUjrEZ9Xy5tmHD/3Xd2Gso6XwB03Sw2lt 49sJV5bixnKFiKgWIuDVdBGTWuHZufbr5gFVb+o2DG9FGEcThUl9s04nceOBEDuX t46XRTYZISL5GWI6NpvIcMIH+9MXV/5+3MnnhmQdz2dpmh3kWK+fJQrsSIhDnHst o/I5ha5N4Nw= =xaS7 -----END PGP SIGNATURE-----