CVE-2014-4894 in MyMetro
Summary
by MITRE
The MyMetro (aka com.myrippleapps.mymetro) application 2.4.7 for Android does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
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Analysis
by VulDB Data Team • 08/23/2024
The vulnerability identified as CVE-2014-4894 affects the MyMetro application version 2.4.7 for Android devices, representing a critical security flaw in the application's implementation of secure communication protocols. This issue stems from the application's failure to properly validate X.509 certificates during SSL/TLS connections, creating a significant attack surface that can be exploited by malicious actors. The flaw fundamentally undermines the cryptographic security measures designed to protect data integrity and confidentiality between the mobile application and remote servers, leaving users vulnerable to various forms of cyber attacks.
The technical root cause of this vulnerability lies in the application's improper handling of SSL certificate validation processes. When an Android application establishes a secure connection to a remote server, it should verify the server's X.509 certificate against a trusted certificate authority to ensure the authenticity of the server. However, the MyMetro application fails to perform this crucial verification step, allowing attackers to present fraudulent certificates that appear legitimate to the application. This behavior directly violates established security protocols and creates a trust relationship that can be easily manipulated by adversaries. The vulnerability aligns with CWE-295, which specifically addresses "Improper Certificate Validation," and represents a classic example of weak cryptographic implementation that undermines the entire security framework of secure communications.
The operational impact of this vulnerability extends beyond simple data interception, as it enables sophisticated man-in-the-middle attacks that can compromise user data and system integrity. Attackers can exploit this weakness to establish fraudulent connections with the application, potentially intercepting sensitive user information including personal data, login credentials, or financial information. The vulnerability is particularly concerning because it affects a mobile application that likely handles user accounts and personal information, making it a prime target for cybercriminals seeking to exploit user trust. This weakness can be leveraged to conduct session hijacking, data theft, or even account takeover attacks, as the application cannot distinguish between legitimate and malicious servers. From an attacker perspective, this vulnerability maps to ATT&CK technique T1046, which involves network service scanning, and T1566, which covers credential harvesting through phishing, as the compromised application becomes an entry point for broader attack campaigns.
Mitigation strategies for this vulnerability require immediate implementation of proper certificate validation mechanisms within the application. Developers must ensure that the application performs thorough X.509 certificate validation by implementing certificate pinning techniques, which involve embedding trusted certificate fingerprints within the application to verify server authenticity. The solution should include proper certificate chain validation, expiration date checking, and revocation status verification to establish a robust security posture. Additionally, implementing certificate transparency measures and regular security audits can help prevent similar issues in future releases. Organizations should also consider deploying network monitoring tools to detect and respond to potential exploitation attempts, while users should be advised to avoid using the vulnerable application until proper security patches are implemented. This vulnerability serves as a stark reminder of the importance of cryptographic best practices in mobile application development and highlights the critical need for comprehensive security testing throughout the software development lifecycle.