CVE-2014-6832 in Bersa Forum
Summary
by MITRE
The Bersa Forum (aka com.gcspublishing.bersaforum) application 3.9.16 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 • 09/18/2024
The Bersa Forum Android application version 3.9.16 contains a critical security vulnerability that fundamentally undermines the integrity of its secure communication channels. This flaw represents a severe deviation from established cryptographic best practices and exposes users to significant risk during network interactions. The application's failure to properly validate X.509 certificates from SSL servers creates a pathway for sophisticated attackers to execute man-in-the-middle attacks without detection. This vulnerability directly impacts the application's ability to establish trust between the client and remote servers, effectively nullifying the security assurances that SSL/TLS protocols are designed to provide.
The technical nature of this vulnerability stems from the application's improper implementation of certificate validation mechanisms within its SSL/TLS handshake process. When the Bersa Forum application establishes secure connections to its backend servers, it fails to perform the essential certificate verification steps that should confirm the authenticity of the server's identity. This includes checking certificate expiration dates, validating the certificate authority chain, and ensuring proper domain name matching. The absence of these security checks means that any attacker capable of presenting a fraudulent certificate can successfully impersonate legitimate servers. This weakness aligns with CWE-295, which specifically addresses improper certificate validation in security protocols, and represents a fundamental failure in the application's cryptographic implementation.
The operational impact of this vulnerability extends far beyond simple data interception, creating multiple attack vectors that can compromise sensitive user information and system integrity. Attackers can exploit this weakness to capture user credentials, session tokens, and personal data transmitted through the application's secure channels. The vulnerability particularly affects users who rely on the application for sensitive communications, as the attacker can seamlessly intercept and modify data in transit without the application's knowledge or the user's awareness. This creates a persistent threat landscape where users remain vulnerable to credential theft, data manipulation, and unauthorized access to their accounts and associated information. The attack surface is further expanded because the vulnerability affects all network communications within the application, making it a systemic rather than isolated security weakness.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements. The primary solution involves implementing proper certificate pinning mechanisms within the application, ensuring that only pre-approved certificates or certificate authorities are accepted for validation. This approach directly addresses the root cause by preventing the acceptance of fraudulent certificates while maintaining legitimate server communications. Additionally, the application should implement certificate chain validation, expiration checking, and domain name verification to ensure that all security checks are properly enforced. Organizations should also consider implementing network monitoring to detect unusual certificate behavior and establish incident response procedures for potential exploitation attempts. This vulnerability demonstrates the critical importance of adhering to security standards such as those outlined in the OWASP Mobile Security Project and aligns with ATT&CK technique T1041, which covers data manipulation through man-in-the-middle attacks, emphasizing the need for comprehensive mobile application security frameworks that prevent such fundamental cryptographic failures.