CVE-2018-15898 in Music Streamer
Summary
by MITRE
The Subsonic Music Streamer application 4.4 for Android has Improper Certificate Validation of the Subsonic server certificate, which might allow man-in-the-middle attackers to obtain interaction data.
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Analysis
by VulDB Data Team • 05/08/2023
The CVE-2018-15898 vulnerability affects the Subsonic Music Streamer application version 4.4 for Android, presenting a critical security flaw in certificate validation mechanisms. This weakness enables man-in-the-middle attackers to intercept and potentially manipulate communication between the mobile client and Subsonic servers, compromising the integrity and confidentiality of user data transmission. The vulnerability stems from inadequate verification of server certificates during the secure connection establishment process, creating an exploitable gap in the application's security architecture.
The technical flaw manifests in the application's failure to properly validate SSL/TLS certificates presented by Subsonic servers during the connection handshake process. This improper certificate validation allows attackers to present fake certificates that the application accepts as legitimate, effectively breaking the cryptographic security guarantees that should protect user interactions. The vulnerability specifically targets the certificate validation logic within the Android application, where the security checks are insufficient to detect forged certificates or certificates issued by untrusted Certificate Authorities. This weakness aligns with CWE-295, which describes improper certificate validation, and represents a fundamental failure in the application's trust model.
The operational impact of this vulnerability extends beyond simple data interception, as it enables attackers to access sensitive user interaction data including login credentials, playlist information, and personal music preferences. Mobile users who connect to Subsonic servers through the vulnerable application face significant risks when using public Wi-Fi networks or connecting to untrusted networks, as the attack can be executed without requiring any special privileges or advanced technical skills. The vulnerability affects all users who rely on the Subsonic streaming service through the Android application, particularly those who access their music libraries remotely or share sensitive personal information through the platform. This weakness creates a persistent threat vector that can be exploited repeatedly during user sessions.
Mitigation strategies for CVE-2018-15898 should focus on implementing robust certificate validation mechanisms that enforce strict certificate chain verification and certificate pinning techniques. Organizations should immediately update to patched versions of the Subsonic application that address the certificate validation flaw, while also implementing certificate pinning to prevent the acceptance of unauthorized certificates. Network administrators should consider deploying additional security controls such as SSL inspection and monitoring for suspicious certificate behavior. The vulnerability demonstrates the importance of following security best practices outlined in the OWASP Mobile Security Project, particularly regarding secure communication protocols and certificate management. Users should be advised to avoid connecting to Subsonic servers through untrusted networks until the application is properly updated and patched to address this security weakness.