Exploiting Trustzone on Android Di Shen(@returnsme) retme7@gmail.com 1 Introduction This paper tells a real story about exploiting TrustZone step by step. I target an implementation of Trusted Execution Environment(TEE) used by Huawei HiSilicon. Firstly I find a vulnerability to gain kernel-level privileges in normal world.
TrustZone in the processor. In this topic, we discuss support for TrustZone within the processor. Other sections cover support in the memory system and the software story that is built on the processor and memory system support. Security states. In the Arm architecture, there … TruzCall: Secure VoIP Calling on Android using ARM TrustZone We implemented our design, TruzCall using Android OS and TrustZone TEE running OP-TEE OS. We built a prototype using the TrustZone-enabled Hikey development board and tested our design using the open source VoIP app Linphone. Our testing utilizes a simulation based environment that allows a Hikey board to use a real phone for audio hardware. TrustZone | TrustZone for Cortex-M – Arm Developer The Armv8-M architecture extends TrustZone technology to Cortex-M based systems, enabling robust levels of protection at all cost points. TrustZone reduces the potential for attack by isolating the critical security firmware and private information, such as secure boot, firmware update, and keys, from the rest of the application. Check Point: Qualcomm TrustZone flaws could be 'game over'
Nov 14, 2019 · Today, ARM TrustZone is an integral part of all modern mobile devices. As seen on Android-based Nexus/Pixel phones, TrustZone components are integrated in bootloader, radio, vendor and system Android images.
TruzCall: Secure VoIP Calling on Android using ARM TrustZone We implemented our design, TruzCall using Android OS and TrustZone TEE running OP-TEE OS. We built a prototype using the TrustZone-enabled Hikey development board and tested our design using the open source VoIP app Linphone. Our testing utilizes a simulation based environment that allows a Hikey board to use a real phone for audio hardware. TrustZone | TrustZone for Cortex-M – Arm Developer The Armv8-M architecture extends TrustZone technology to Cortex-M based systems, enabling robust levels of protection at all cost points. TrustZone reduces the potential for attack by isolating the critical security firmware and private information, such as secure boot, firmware update, and keys, from the rest of the application.
Except downgrading the Trustzone will survive a reinstall of the ROM / Factory Reset. So you could have root on an older version of Android, downgrade the trustzone firmware, upgrade Android to a more secure version, then use the older trustzone firmware to bypass the newer Android version's security.
ARM: Trusted Zone on Android - LinkedIn SlideShare Dec 08, 2015 TrustZone "TEE" tech ported to Raspberry Pi 3 ARM TrustZone, which is defined by Sequitur Labs as an on-chip “security enclave” that provides hardware isolation and protection for cryptographic keys, algorithms, and sensitive data, is widely used on mobile devices and set-top boxes. Now, ARM and Linaro want to expand TrustZone… java - How to add a certificate to the Android trust store