Yadea T5 Electric Bicycles, specifically models manufactured in or after 2024, exhibit a significant vulnerability due to a weak authentication mechanism in their keyless entry system. The system utilizes the EV1527 fixed-code RF protocol, lacking the implementation of rolling codes or cryptographic challenge-response mechanisms. This vulnerability allows local attackers to intercept legitimate key fob transmissions and perform a replay attack, resulting in unauthorized operation of the vehicle.
The CVSS score of 7.3 categorizes this vulnerability as high severity, indicating a serious risk to organizations that deploy these bicycles. The potential for unauthorized access could lead to significant safety and operational issues.
Given the ease of exploitation, organizations should prioritize addressing this vulnerability swiftly. Failure to act may result in grave consequences, including financial loss and reputational damage.
As of now, the status of this vulnerability is awaiting analysis, but the exploitability indicates a high likelihood of compromise. Organizations are urged to remain vigilant and proactive.
Vulnerability Details
The official description states that the Yadea T5 Electric Bicycles have a weak authentication mechanism in their keyless entry system. This vulnerability falls under CWE-1390, which signifies improper authentication. The system is vulnerable to replay attacks, which can have serious implications for user safety.
The CVSS version used is 3.1, with a vector string of CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H. This indicates an adjacent network attack vector requiring user interaction, but no privileges are required for exploitation.
The integrity and availability impacts are rated as high, while confidentiality impact is none. This highlights the potential for significant disruption to operations.
Technical Analysis
The root cause of this vulnerability is the reliance on the EV1527 fixed-code RF protocol without adequate security measures such as rolling codes or cryptographic mechanisms. This design flaw allows an attacker within range to capture and replay the signal from a legitimate key fob.
The attack vector is classified as adjacent network, meaning the attacker must be within physical proximity to the target bicycle. The attack complexity is low, requiring minimal effort to execute the replay attack once the signal is intercepted.
No privileges are required to carry out this attack, making it accessible for potential threat actors. User interaction is required, as the attacker must capture the legitimate key fob's transmission.
The impact on integrity and availability is high, as the attacker can gain full control over the bicycle, potentially leading to theft or unauthorized use.
Risk & Impact Analysis
The real-world deployment risk associated with this vulnerability is significant. Local attackers can exploit the weak authentication mechanism to gain unauthorized access to the bicycles. This could result in theft, unauthorized use, and potential harm to users.
Organizations that use Yadea T5 Electric Bicycles should assess the potential blast radius of this vulnerability. The ability for an attacker to replay a captured key fob signal could lead to widespread unauthorized access if multiple bicycles are affected.
Based on the CVSS score of 7.3, organizations must prioritize patching this vulnerability immediately. The risk of exploitation is high, and the potential consequences of an attack are severe.
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All models of Yadea T5 Electric Bicycles manufactured in or after 2024 are affected by this vulnerability. Organizations utilizing these bicycles should prepare for mitigation strategies.
Mitigation & Remediation
Organizations should take immediate steps to patch this vulnerability. If a patch is unavailable, consider implementing additional security measures such as restricting access to bicycles and enhancing monitoring of key fob usage.
For further assistance, organizations can utilize penetration testing services to evaluate security postures.
Detection Guidance
Monitor for unusual key fob activities, including multiple attempts to unlock or access bicycles within a short timeframe. Log access attempts and analyze patterns for potential replay attacks.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability highlights the importance of robust authentication mechanisms in consumer products. Security teams must prioritize addressing weaknesses in keyless entry systems to mitigate risks.
This vulnerability serves as a reminder of the vulnerabilities associated with fixed-code protocols. Security teams should apply lessons learned to enhance their security measures.
Organizations are encouraged to review their authentication mechanisms and consider implementing more secure protocols. For further information on securing your systems, refer to the security checklist for developers to improve overall security posture.
Additionally, organizations should consider engaging in penetration testing to identify potential vulnerabilities and enhance their defenses.
This incident underscores the need for ongoing security assessments and updates to maintain a strong defense against emerging threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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