CVE-2014-3750 in Bilyoner
Summary
by MITRE
The Bilyoner application before 2.3.1 for Android and before 4.6.2 for iOS 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 • 03/09/2019
The vulnerability identified as CVE-2014-3750 affects the Bilyoner mobile application across both android and ios platforms, representing a critical security flaw in the application's secure communication implementation. This vulnerability specifically targets the application's certificate verification mechanism within the SSL/TLS protocol stack, creating a significant attack surface that adversaries can exploit to compromise user data and system integrity. The issue manifests in versions prior to 2.3.1 for android and 4.6.2 for ios, indicating that the developers failed to implement proper certificate pinning or validation procedures that are essential for maintaining secure communications between mobile applications and their backend services.
The technical flaw stems from the application's failure to perform adequate X.509 certificate validation during the SSL handshake process. This deficiency allows attackers to perform man-in-the-middle attacks by presenting fraudulent certificates that appear legitimate to the vulnerable application. The vulnerability directly relates to CWE-295 which describes weaknesses in certificate validation mechanisms, specifically targeting the absence of proper certificate chain validation and hostname verification. When an application does not properly verify SSL certificates, it essentially removes the cryptographic assurance that data transmitted between the client and server remains confidential and authentic, making it trivial for attackers to intercept, modify, or steal sensitive user information including login credentials, personal data, and financial transactions.
The operational impact of this vulnerability extends beyond simple data theft to encompass complete compromise of user trust and application integrity. Attackers can exploit this weakness to impersonate legitimate servers and establish fraudulent communication channels with users, potentially capturing sensitive information such as banking details, personal identification numbers, and private communications. The vulnerability is particularly dangerous in mobile environments where applications often handle highly sensitive data and operate in less secure network conditions. According to ATT&CK framework, this represents a technique categorized under T1046 Network Service Scanning and T1566 Impersonation, as attackers can leverage the certificate validation bypass to establish unauthorized communication channels and potentially escalate privileges within the application's security model.
Mitigation strategies for this vulnerability require immediate implementation of proper certificate validation mechanisms throughout the application's secure communication stack. Organizations should implement certificate pinning techniques that explicitly define which certificates or certificate authorities are trusted for the application's communication. The solution involves configuring the application to validate certificate chains against a known set of trusted certificates rather than accepting any certificate presented by the server. Additionally, developers must ensure that hostname verification is properly implemented to prevent certificate forgery attacks where attackers present certificates for different domains than the intended target. The remediation process should include thorough code review and security testing to validate that certificate validation is properly implemented across all network communication pathways within the application. Regular security assessments and updates should be maintained to address potential certificate validation issues that may arise from new attack vectors or evolving security threats in the mobile application landscape.