5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
40.1%
**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
This advisory was originally posted to the NCCIC Portal on August 22, 2017, and is being released to the ICS-CERT web site.
The following version of Shanghai OnStar iOS Client, a vehicle management mobile application, is affected:
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.
GM recommends the following mitigations:
ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
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 ICSβCERT Technical Information Paper, ICS-TIP-12-146-01BβTargeted 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.
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).
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).
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).
ADLab of Venustech reported these vulnerabilities to ICS-CERT.
Critical Infrastructure Sector: Transportation Systems
Countries/Areas Deployed: United States, Asia
Company Headquarters Location: United States
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-12695
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-12697
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-9663
cwe.mitre.org/data/definitions/287.html
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5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
40.1%