CVE-2014-6673 in ChallengerTX
Summary
by MITRE
The ChallengerTX (aka com.zhtiantian.ChallengerTX) application 3.9.12.5 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 • 09/12/2024
The vulnerability identified as CVE-2014-6673 affects the ChallengerTX Android application version 3.9.12.5, representing a critical security flaw in the application's implementation of secure communication protocols. This weakness resides in the application's failure to properly validate X.509 certificates during SSL/TLS connections, creating an exploitable condition that undermines the fundamental security guarantees of encrypted communications. The vulnerability specifically targets the certificate verification process, which is a cornerstone of secure network communication and essential for establishing trust between client and server components.
The technical flaw manifests as an absence of proper certificate chain validation and trust verification mechanisms within the application's SSL implementation. When the ChallengerTX application establishes connections to remote servers, it fails to perform the necessary cryptographic checks that would normally validate certificate authenticity, including checking certificate signatures, verifying certificate authorities, and ensuring proper certificate expiration dates. This omission allows attackers to present maliciously crafted certificates that the application will accept without proper scrutiny, effectively breaking the SSL/TLS security model that is designed to prevent unauthorized parties from intercepting or modifying communications.
The operational impact of this vulnerability is severe and multifaceted, as it enables man-in-the-middle attacks that can compromise sensitive user data and system integrity. Attackers can exploit this weakness to intercept and manipulate communications between the vulnerable application and its backend servers, potentially gaining access to user credentials, personal information, financial data, or other confidential content. The vulnerability affects not only data confidentiality but also data integrity and authentication, as the application cannot reliably verify the identity of the servers it communicates with, creating opportunities for data exfiltration, session hijacking, and other sophisticated attack vectors.
This vulnerability aligns with CWE-295, which specifically addresses "Improper Certificate Validation," and represents a classic example of weak cryptographic implementation that violates fundamental security principles. From an ATT&CK framework perspective, this weakness maps to techniques involving credential access and defense evasion, as attackers can leverage the vulnerability to obtain sensitive information while potentially remaining undetected within the network. The vulnerability also demonstrates characteristics consistent with ATT&CK technique T1046, which involves network service scanning and reconnaissance activities that can be facilitated by compromising the certificate validation process.
Mitigation strategies for this vulnerability require immediate implementation of proper certificate validation mechanisms within the application's SSL/TLS stack. The recommended approach involves configuring the application to perform comprehensive certificate chain validation, including verification against trusted certificate authorities, proper signature checking, and expiration date validation. Security patches should enforce certificate pinning where appropriate, implement proper trust store management, and ensure that the application rejects certificates that fail any of the standard verification checks. Additionally, network administrators should consider implementing monitoring solutions to detect anomalous certificate behavior and establish secure communication protocols that maintain the integrity of the SSL/TLS infrastructure while protecting against the specific attack vectors enabled by this vulnerability.