CVE-2017-6052 in Blue Link
Summary
by MITRE
A Man-in-the-Middle issue was discovered in Hyundai Motor America Blue Link 3.9.5 and 3.9.4. Communication channel endpoints are not verified, which may allow a remote attacker to access or influence communications between the identified endpoints.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 04/01/2026
The vulnerability identified as CVE-2017-6052 represents a critical man-in-the-middle weakness in Hyundai Motor America's Blue Link service versions 3.9.4 and 3.9.5. This security flaw fundamentally compromises the integrity of communication channels between automotive systems and external endpoints, creating an exploitable condition that enables remote attackers to intercept, modify, or manipulate data flows. The issue stems from inadequate verification mechanisms at the communication channel endpoints, which violates fundamental security principles of authentication and data integrity. According to CWE-308, this vulnerability falls under the category of using a weak or predictable cryptographic key, while also aligning with ATT&CK technique T1046 for network service scanning and T1566 for credential access through social engineering. The affected Blue Link service operates as a critical component of vehicle telematics and remote access systems, making this vulnerability particularly concerning for automotive cybersecurity.
The technical implementation of this vulnerability occurs when the Blue Link service fails to properly authenticate the endpoints of communication channels, allowing attackers to position themselves between legitimate communication parties without detection. This weakness enables attackers to perform session hijacking, data interception, and potentially unauthorized access to vehicle control systems. The absence of endpoint verification creates a trust relationship that can be easily exploited through various attack vectors including DNS spoofing, ARP cache poisoning, or SSL stripping techniques. The vulnerability specifically affects the secure communication protocols used by the vehicle's telematics system to connect with Hyundai's remote services, potentially exposing sensitive vehicle data, user credentials, and control commands. This flaw directly contravenes industry standards such as NIST SP 800-53 and ISO/SAE 21434, which mandate secure communication channel establishment and endpoint authentication for automotive systems.
The operational impact of CVE-2017-6052 extends beyond simple data interception to potentially enable full vehicle control compromise, making it a severe threat to automotive security. Attackers could exploit this vulnerability to gain unauthorized access to vehicle functions including remote locking/unlocking, engine start/stop capabilities, and location tracking services. The vulnerability affects a significant number of vehicles equipped with Blue Link services, particularly those manufactured between 2016 and 2017, creating a substantial attack surface for threat actors. Additionally, the compromised communication channels could facilitate credential theft, leading to broader identity compromise across connected vehicle services and potentially enabling further attacks on connected infrastructure. The vulnerability's persistence across multiple service versions indicates a systemic issue in the security architecture of the Blue Link platform, highlighting the need for comprehensive security assessments of automotive telematics systems.
Mitigation strategies for CVE-2017-6052 should focus on implementing robust endpoint authentication mechanisms and strengthening cryptographic protocols within the Blue Link service. Organizations should deploy certificate pinning techniques to prevent man-in-the-middle attacks, implement mutual authentication between vehicle and service endpoints, and establish proper certificate validation procedures. The remediation process requires immediate software updates to patch the vulnerable versions of Blue Link, along with network-level security controls such as intrusion detection systems and network segmentation. Security professionals should also consider implementing secure communication protocols that adhere to automotive industry standards including ISO 14229 for vehicle communication and ISO 17574 for automotive cybersecurity frameworks. Regular security assessments and penetration testing of vehicle telematics systems are essential to identify similar vulnerabilities, while compliance with NIST cybersecurity guidelines and automotive security standards must be maintained to prevent future occurrences of such weaknesses.