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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.0112 Multiple vulnerabilities have been identified in General Motors and Shanghai OnStar (SOS) iOS Client 10 January 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: General Motors and Shanghai OnStar (SOS) iOS Client Publisher: ICS-CERT Operating System: Apple iOS Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Access Confidential Data -- Remote with User Interaction Unauthorised Access -- Existing Account Resolution: Mitigation CVE Names: CVE-2017-12697 CVE-2017-12695 CVE-2017-9663 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-17-234-04 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-17-234-04) General Motors and Shanghai OnStar (SOS) iOS Client Original release date: January 09, 2018 Share Legal Notice 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 9.8 ATTENTION: Remotely exploitable/low skill level to exploit. Vendor: General Motors (GM), Shanghai OnStar (SOS) Equipment: SOS iOS Client Vulnerabilities: Cleartext Storage of Sensitive Information, Man-in-the-Middle, Improper Authentication REPOSTED INFORMATION This advisory was originally posted to the NCCIC Portal on August 22, 2017, and is being released to the ICS-CERT web site. AFFECTED PRODUCTS The following version of Shanghai OnStar iOS Client, a vehicle management mobile application, is affected: Shanghai OnStar iOS Client Version 7.1 IMPACT Successful exploitation of these vulnerabilities could allow an attacker to remotely gain full access to the Shanghai OnStar iOS client, allowing for the control of remote vehicle commands and the ability to view and edit account data. MITIGATION GM recommends the following mitigations: Users should not root or jailbreak their phones to prevent the preconditions for attacker access to mobile phone memory, including the ability to read JSON web token encryption keys. GM HTTP Public Key Pinning rollout is complete to mitigate Man-In-The-Middle attacks for SOS iOS Client Version 7.1. The rollout includes back office and iOS client changes (now version 7.2). For North America iOS OnStar clients, HTTP Public KeyPinning deployment (back office and mobile app) is scheduled for December 2017. Debugging code was removed from SOS Identity Management servers to prevent attacker access to user accounts. ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet. Locate control system networks and remote devices behind firewalls, and isolate them from the business network. When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices. 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 this vulnerability. VULNERABILITY OVERVIEW CLEARTEXT STORAGE OF SENSITIVE INFORMATION CWE-312 Successful exploitation of this vulnerability may allow a remote attacker to access an encryption key that is stored in cleartext in memory. CVE-2017-9663 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). CHANNEL ACCESSIBLE BY NON-ENDPOINT (MAN-IN-THE-MIDDLE) CWE-300 Successful exploitation of this vulnerability may allow an attacker to intercept sensitive information when the client connects to the server. CVE-2017-12697 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). IMPROPER AUTHENTICATION CWE-287 Successful exploitation of this vulnerability may allow an attacker to subvert security mechanisms and reset a user account password. CVE-2017-12695 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). RESEARCHER Charles Gans reported these vulnerabilities to ICS-CERT. BACKGROUND Critical Infrastructure Sector: Transportation Systems Countries/Areas Deployed: United States, Asia Company Headquarters Location: United States Contact Information For any questions related to this report, please contact the NCCIC at: Email: NCCICCUSTOMERSERVICE@hq.dhs.gov (link sends e-mail) Toll Free: 1-888-282-0870 For industrial control systems cybersecurity information: http://ics-cert.us-cert.gov or incident reporting: https://ics-cert.us-cert.gov/Report-Incident? The NCCIC continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - --------------------------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: https://www.auscert.org.au/bulletins/ =========================================================================== 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). 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