Nov 14, 2019 · Security vulnerabilities in Qualcomm allow attackers to steal private data from hundreds of million millions of devices, especially Android smartphones. Security experts from Check Point have discovered security flaws in Qualcomm that could be exploited attackers to steal private data from the so-called TrustZone. The TrustZone is a security extension integrated by ARM into the […]

Here is the 2 most popular for Android: 1) t>base by Trustonic (estimated to about 400 mil installations); 2) QSEE by Qualcomm - mostly targeting phone manufactures, was used in most phones that were based on Qualcomm Snapdragon SoC - for example Nexus 4, Nexus 5, LG G2, HTC One series, Moto X, Samsung Galaxy S4, and Samsung Galaxy Note 3. Apr 07, 2017 · Beniamini's previous blog posts have shown that applications that run in the TrustZone in Android devices using Qualcomm chips can be reverse-engineered. By reverse-engineering the Keymaster We reverse engineered Qualcomm TrustZone applications, emulated them on Android OS and assessed their reliability. During the investigation, numerous engineering challenges, such as bypassing Qualcomm’s Chain Of Trust to load patched trustlets, executing Qualcomm OS related system calls on Android and many others, were solved. The ARM Cortex-A9 MPCore is a 32-bit processor core licensed by ARM Holdings implementing the ARMv7-A architecture.It is a multicore processor providing up to 4 cache-coherent cores. Jul 20, 2020 · Qualcomm CEO Steve Mollenkopf sold shares of the maker of wireless chips as they approach a multiyear high. It was his first sale of Qualcomm stock since 2014. Jul. 17, 2020 at 4:39 p.m. ET by Apr 23, 2019 · On some devices, Qualcomm's TrustZone-based keystore leaks sensitive information through the branch predictor and memory caches, enabling recovery of 224 and 256-bit ECDSA keys. We demonstrate this by extracting an ECDSA P-256 private key from the hardware-backed keystore on the Nexus 5X. More details are available in our paper. Location

TrustZone for Cortex-A. TrustZone is used on billions of application processors to protect high-value code and data for diverse use cases including authentication, payment, content protection and enterprise. On application processors, TrustZone is frequently used to provide a security boundary for a GlobalPlatform Trusted Execution Environment.

[UPDATE: I've made a factual mistake in the original blog post, and have corrected it in the post below. Apparently Qualcomm are not able to sign firmware images, only OEMs can do so. As such, they cannot be coerced to create a custom TrustZone image. I apologise for the mistake.] And now without further ado, let's get to it! Setting the Stage TrustZone also expands the standard “Exception Level” privilege model for the CPU. Before TrustZone, three levels existed: EL0 (user-mode), EL1 (kernel-mode) and EL2 (hypervisor-mode). TrustZone adds a new EL3 (secure monitor mode), which is the most privileged level and controls the entire system. As Dhrystone is a synthetic benchmark developed in 1980s, it is no longer representative of prevailing workloads – use with caution. Designed by third parties. These cores implement the ARM instruction set, and were developed independently by companies with an architectural license from ARM.

Flaws in Qualcomm chips allows stealing private from

Project Zero: Trust Issues: Exploiting TrustZone TEEs In the Android ecosystem, two major TEE implementations exist - Qualcomm’s QSEE and Trustonic’s Kinibi (formerly