CVE-2016-4832 in Service Application
Summary
by MITRE
WAON "Service Application" for Android 1.4.1 and earlier does not verify SSL certificates.
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Analysis
by VulDB Data Team • 09/19/2020
The vulnerability identified as CVE-2016-4832 affects the WAON Service Application for Android versions 1.4.1 and earlier, presenting a critical security flaw in the application's secure communication implementation. This vulnerability stems from the application's failure to properly validate SSL certificates during network communications, creating a significant attack surface that could be exploited by malicious actors. The issue represents a fundamental breakdown in the application's security architecture, as it undermines the core principles of secure network communication and data integrity.
The technical flaw manifests as a missing SSL certificate verification mechanism within the application's network stack implementation. When the WAON application establishes connections to remote servers, it fails to validate the server certificates against trusted certificate authorities, allowing for man-in-the-middle attacks to occur without detection. This vulnerability directly maps to CWE-295, which addresses improper certificate validation in secure communications, and aligns with ATT&CK technique T1041 by enabling network sniffing and interception activities. The absence of certificate pinning or proper validation routines means that attackers can present fraudulent certificates to establish seemingly legitimate connections with the application.
The operational impact of this vulnerability is substantial, as it exposes users' sensitive transactional data and personal information to potential interception and manipulation. Attackers could exploit this weakness to eavesdrop on communications between the mobile application and backend servers, potentially accessing financial transaction details, user credentials, or other confidential information. The vulnerability affects the application's integrity and confidentiality assurances, undermining the trust model that users place in the secure payment system. This flaw particularly impacts the application's ability to maintain secure sessions and protect against various network-based attacks including SSL stripping and certificate substitution attacks.
Mitigation strategies for this vulnerability should focus on implementing proper SSL certificate validation mechanisms within the application's network communication layer. The recommended approach involves integrating robust certificate validation routines that verify certificate chains against trusted certificate authorities and implementing certificate pinning where appropriate. Organizations should also consider deploying network monitoring solutions to detect anomalous traffic patterns that might indicate exploitation attempts. Additionally, the application should be updated to include proper error handling for certificate validation failures, ensuring that connections are terminated when certificate verification fails. This vulnerability highlights the importance of adhering to security best practices in mobile application development and demonstrates the critical need for comprehensive security testing including network protocol validation and secure coding practices. The remediation process should include thorough code review of all network communication components and implementation of automated security testing to prevent similar issues in future releases.