CVE-2019-5954 in Japan Train Operation Information Push Notification App
Summary
by MITRE
JR East Japan train operation information push notification App for Android version 1.2.4 and earlier allows remote attackers to bypass access restriction to obtain or alter the user's registered information via unspecified vectors.
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Analysis
by VulDB Data Team • 09/23/2023
The vulnerability identified as CVE-2019-5954 affects the JR East Japan train operation information push notification application for Android systems running version 1.2.4 and earlier. This mobile application serves as a critical communication channel for railway passengers receiving real-time train operation updates and service information. The security flaw resides within the application's access control mechanisms, specifically within the authentication and authorization framework that governs user data handling and manipulation. The vulnerability represents a significant weakness in the application's security architecture as it allows remote attackers to bypass established access restrictions without requiring physical device access or sophisticated local exploitation techniques.
The technical implementation of this vulnerability stems from insufficient input validation and inadequate session management within the application's backend services. Attackers can exploit unspecified vectors to gain unauthorized access to user registration data, potentially including personal information such as names, contact details, and possibly location data. The flaw essentially creates a backdoor that allows malicious actors to manipulate user account information, modify registered details, or even impersonate legitimate users within the system. This type of vulnerability aligns with CWE-284, which addresses improper access control issues in software systems, where inadequate authorization checks enable unauthorized data access and modification. The attack surface is particularly concerning given that mobile applications often handle sensitive personal data and maintain persistent user sessions.
The operational impact of this vulnerability extends beyond simple data exposure, as it creates opportunities for identity theft, service disruption, and potential financial fraud. When users register for train information services, they typically provide personal details that may be linked to other accounts or services, making this vulnerability particularly dangerous in a connected ecosystem. The remote nature of the attack means that threat actors can exploit this weakness from anywhere in the world without requiring physical proximity to the target device. This characteristic places the vulnerability within ATT&CK framework category T1071.004, which covers application layer protocol manipulation, and T1566, which addresses credential harvesting through social engineering or application exploitation. The potential for data alteration poses additional risks to the integrity of the railway information service, as malicious actors could manipulate train schedules or service alerts, potentially causing operational disruptions or safety concerns.
Mitigation strategies for this vulnerability should focus on implementing robust authentication mechanisms, including proper session management, input validation, and access control checks. Organizations should implement multi-factor authentication for user accounts, enforce secure coding practices to prevent injection attacks, and regularly audit application security controls. The affected application version should be immediately updated to a patched release that addresses the access control weaknesses. Security measures should also include monitoring for unauthorized access attempts and implementing network segmentation to limit the potential impact of successful exploitation. Additionally, user education regarding the importance of keeping applications updated and recognizing potential security threats remains crucial in maintaining overall system security posture. The vulnerability demonstrates the critical importance of proper access control implementation in mobile applications that handle sensitive user data and highlights the need for continuous security assessment and remediation processes.