CVE-2014-5852 in Kakao
Summary
by MITRE
The Kakao (aka com.com2us.tinypang.kakao.freefull2.google.global.android.common) application 2.11.1.0 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 • 09/03/2024
The vulnerability described in CVE-2014-5852 represents a critical security flaw in the Kakao application version 2.11.1.0 for Android devices, specifically addressing improper SSL/TLS certificate validation mechanisms. This vulnerability falls under the category of weak cryptographic implementations and demonstrates a fundamental failure in the application's secure communication protocols. The flaw enables attackers to perform man-in-the-middle attacks by presenting crafted certificates that the application accepts without proper verification, thereby compromising the integrity of encrypted communications between the mobile client and remote servers.
The technical implementation of this vulnerability stems from the application's failure to properly validate X.509 certificates during SSL/TLS handshakes. When an Android application establishes secure connections to remote servers, it should verify the server's certificate against trusted certificate authorities and ensure the certificate's validity period, domain name matching, and proper signature verification. However, the Kakao application bypasses these critical verification steps, allowing malicious actors to present fake certificates that appear legitimate to the application. This behavior directly violates established security practices for mobile application development and secure communication protocols.
The operational impact of this vulnerability extends beyond simple data interception, as it enables attackers to obtain sensitive user information through various attack vectors. Mobile applications that fail to properly validate SSL certificates create opportunities for attackers to capture user credentials, personal data, financial information, and other confidential communications. The vulnerability affects users of the specific version 2.11.1.0 of the Kakao application, which was distributed through the Google Play Store, potentially exposing millions of users to security risks. The implications are particularly severe for applications handling sensitive user data, as the compromised communication channel allows for complete session hijacking and data exfiltration.
This vulnerability aligns with CWE-295, which specifically addresses "Improper Certificate Validation," and represents a clear violation of secure coding practices outlined in industry standards. The flaw also maps to ATT&CK technique T1041, which covers "Exfiltration Over C2 Channel," as attackers can leverage the compromised SSL connection to exfiltrate data from infected devices. Additionally, the vulnerability corresponds to T1566, "Phishing," as attackers can use the compromised connection to deliver malicious payloads or steal user credentials through spoofed server communications. Organizations should consider this vulnerability in the context of their broader security posture, particularly when evaluating mobile application security and secure communication protocols.
Mitigation strategies for this vulnerability require immediate application updates from the vendor, as well as network-level protections such as SSL pinning implementation. Mobile application developers should implement proper certificate validation mechanisms, including certificate pinning, to prevent attackers from using fake certificates. Network administrators should consider deploying SSL inspection tools and monitoring for suspicious certificate usage patterns. Users should be advised to update to the latest application version as soon as possible and avoid using the vulnerable application on untrusted networks. The vulnerability also highlights the importance of implementing automated security testing during the development lifecycle to identify and remediate such critical security flaws before application deployment.