Attacking Debug Modules In The Android Ecosystem

Debug modules in Android span multiple system layers from app level to driver level, creating numerous attack surfaces focused on inter-process communication

Common attack vectors include:

• Unix domain sockets
• Hardware abstraction layer (HAL) services
• Factory testing tools
• Debug drivers
• System apps with exported interfaces

Major security vulnerabilities discovered:

• CVE-2022-47339: Root privilege command execution via CMD service
• CVE-2022-48382: Memory corruption in debug host service
• CVE-2022-27250: Remote code execution through SPRD AutoSLT

Key contributing factors to vulnerabilities:

• Android ecosystem fragmentation across BSP, system, and product levels
• OEMs/ODMs lacking security awareness
• Debug/factory testing tools left in production firmware
• Complex IPC communication paths
• High-privilege debug components

Security recommendations:

• Vendors should remove debug modules from production releases
• OEMs should selectively choose BSP modules based on needs
• Users should regularly perform security updates
• Factory testing tools should be removed before device release
• Implement proper permission checks in debug components

Google’s mitigation strategies:

• Introduction of vendor partition for BSP code isolation
• Hardware abstraction layer standardization
• Monthly security bulletins
• Android Chipset Security Reward Program

Impact of compromised debug modules:

• Local privilege escalation
• Remote code execution
• Information disclosure (IMEI, WiFi/BT addresses)
• Memory corruption
• Unauthorized root access