CVE-2014-5548 in Christmas Words
Summary
by MITRE
The Christmas Words (aka air.com.sevenBulls.summerWords) application 1.0.1 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 • 08/24/2024
The vulnerability identified as CVE-2014-5548 affects the Christmas Words Android application version 1.0.1, specifically targeting its implementation of secure communication protocols. This flaw represents a critical security weakness in the application's cryptographic security measures that directly impacts the integrity of data transmission between the mobile client and remote servers. The issue stems from the application's failure to properly validate SSL/TLS certificates, creating an exploitable condition that undermines the fundamental security assurances provided by secure communication channels.
The technical flaw manifests as a complete absence of X.509 certificate verification within the application's network communication stack. This deficiency allows malicious actors to perform man-in-the-middle attacks by presenting forged certificates that appear legitimate to the vulnerable application. The application accepts any certificate without proper validation against trusted certificate authorities, effectively disabling the cryptographic protection mechanisms designed to ensure secure data transmission. This vulnerability directly maps to CWE-295, which specifically addresses improper certificate validation in secure communications, and represents a classic example of weak cryptographic implementation in mobile applications.
The operational impact of this vulnerability extends beyond simple data interception, as it enables attackers to gain unauthorized access to sensitive user information transmitted through the application. Mobile applications that handle personal data, authentication credentials, or financial information become particularly vulnerable when they fail to properly validate SSL certificates. Attackers can exploit this weakness to eavesdrop on communications, inject malicious content, or redirect users to fraudulent servers without detection. This vulnerability particularly affects the confidentiality and integrity of user data, potentially exposing personal information, login credentials, or other sensitive data that flows through the application's network connections.
Mitigation strategies for this vulnerability require immediate implementation of proper SSL certificate validation mechanisms within the application. Developers must ensure that all SSL/TLS connections verify certificate chains against trusted certificate authorities and implement proper certificate pinning where appropriate. The solution involves configuring the application to perform thorough X.509 certificate validation including checking certificate expiration dates, verifying certificate signatures, and ensuring certificates are issued by trusted authorities. Security best practices recommend implementing certificate pinning to prevent attackers from using forged certificates even if they can create valid-looking certificates. This vulnerability also highlights the importance of following mobile security standards such as those outlined in the OWASP Mobile Security Project and aligns with ATT&CK technique T1046 which covers network service scanning that could be leveraged to exploit such certificate validation weaknesses. Organizations should also consider implementing network monitoring to detect potential man-in-the-middle attacks and regularly audit their mobile applications for cryptographic security issues.