Description

In the Android application air.SmartLog.android version 2.6.8, a hidden Developer Mode is protected by a hardcoded local password. An attacker can discover this logic through reverse engineering and enable internal/debug functionality without any server-side authentication or role-based access control. Once enabled, additional internal features become accessible, including a debug calculator entry, hidden personal/debug settings, and conditional sync-entry exposure bypass. This may lead to unauthorized access to internal functionality, local configuration tampering, and amplified data integrity and privacy risks.

Step To Reproduce

1、Decompile the APK using jadx

2、Locate the hidden Developer Mode logic and hardcoded password in air/SmartLog/android/SummaryFragment.java

3、Run the app, open the Summary page, and rapidly tap the logo multiple times (trigger path in hiddenMenuTimer).

4、Enter 123ewq in the dialog.

5、Observe that Developer Mode is enabled.

Video Proof of Concept

Mitigation

• Remove Developer Mode and debug-only pathways from production builds.
• Eliminate hardcoded passwords/secrets from client code.
• Enforce server-side authorization for privileged functionality.
• Gate internal features by signed build flavor or remote attestation, not client-side booleans.
• Add security review checks in CI to block debug backdoors before release.

Impact

An attacker can reverse engineer the app, extract the hardcoded password, and unlock internal features intended for restricted/debug use. This weakens access control boundaries, may enable unauthorized configuration changes, increases the attack surface, and can contribute to data integrity/privacy and compliance risk.

References