CVE-2014-7123

Vulnerability

The Brevir Harian V2 application (com.brevir.harian.v) version 2.0 for Android does not properly validate X.509 certificates from SSL servers. This means the app trusts any certificate presented during an HTTPS handshake, including self-signed or maliciously crafted certificates. This vulnerability is common among apps that fail to follow secure coding practices, as documented in [1].

Exploitation

An attacker must be on the same network as the victim's Android device (e.g., public Wi-Fi) and can perform a man-in-the-middle (MITM) attack by presenting a crafted certificate. No authentication or user interaction beyond normal app usage is required. The attacker intercepts the SSL/TLS connection between the app and its server, allowing them to decrypt and read or modify the traffic.

Impact

Successful exploitation allows the attacker to view and modify network traffic that should have been protected by HTTPS. This can lead to credential theft, disclosure of sensitive personal or financial information, and potentially arbitrary code execution depending on the app's functionality. The impact is limited to data transmitted over the compromised connection.

Mitigation

No official fix has been released for version 2.0 of the Brevir Harian V2 app. Users are advised to avoid using the app and instead access the service via a web browser, which typically implements proper SSL certificate validation. As noted in [1], many Android apps suffer from this issue, and the best mitigation is to use alternative methods that require proper SSL verification.