CVE-2014-5725 in Truecaller-caller Id! Block
Summary
by MITRE
The Truecaller - Caller ID & Block (aka com.truecaller) application 4.32 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 • 08/30/2024
The vulnerability identified as CVE-2014-5725 represents a critical security flaw in the Truecaller Android application version 4.32, specifically addressing improper SSL certificate validation mechanisms. This weakness exposes users to significant man-in-the-middle attack vectors where malicious actors can intercept and manipulate communications between the application and remote servers. The vulnerability stems from the application's failure to properly validate X.509 certificates during SSL/TLS connections, creating a pathway for attackers to present fraudulent certificates that the application would accept as legitimate. This flaw directly violates fundamental security principles of secure communication and authentication.
The technical implementation of this vulnerability manifests in the application's SSL/TLS handshake process where certificate verification is either completely bypassed or inadequately performed. When the Truecaller application establishes secure connections to its backend services, it fails to validate the certificate chain against trusted certificate authorities or perform proper hostname verification. This allows attackers to deploy custom certificates that appear legitimate to the application, enabling them to decrypt and modify sensitive data transmitted between the mobile application and server infrastructure. The flaw falls under the category of weak cryptographic implementation and certificate validation failures, commonly classified as CWE-295 in the Common Weakness Enumeration system.
From an operational perspective, this vulnerability creates substantial risk for users of the Truecaller application as it enables attackers to intercept and access sensitive personal information including caller ID data, contact details, and potentially other user-specific information that the application processes. The impact extends beyond simple data interception to include potential identity theft, privacy violations, and unauthorized access to user communication patterns. Attackers could exploit this vulnerability to impersonate legitimate Truecaller servers, redirect users to malicious endpoints, or inject false caller identification information that could be used for social engineering attacks. The vulnerability particularly affects users in environments where network traffic interception is possible, such as public Wi-Fi networks or corporate networks with compromised infrastructure.
Mitigation strategies for this vulnerability require immediate application updates that implement proper SSL certificate validation mechanisms. The recommended approach involves configuring the application to perform full certificate chain validation against trusted root certificates, implementing hostname verification checks, and ensuring that certificate pinning mechanisms are properly enforced. Organizations should also consider implementing network-level security controls such as SSL inspection with proper certificate management to prevent exploitation. The remediation aligns with ATT&CK framework technique T1046 which addresses network service scanning and T1566 which covers credential access through social engineering, emphasizing the need for robust certificate validation as a foundational security control. Additionally, this vulnerability highlights the importance of following secure coding practices and implementing proper cryptographic protocols as outlined in industry standards such as NIST SP 800-57 and OWASP Mobile Top 10 guidelines.