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MIT Researchers Discover New Flaw in Apple M1 CPUs That Can't Be Patched

MIT Researchers Discover New Flaw in Apple M1 CPUs That Can't Be Patched

June 11, 2022Ravie Lakshmanan
A novel hardware attack dubbed  PACMAN  has been demonstrated against Apple's M1 processor chipsets, potentially arming a malicious actor with the capability to gain arbitrary code execution on macOS systems. It leverages "speculative execution attacks to bypass an important memory protection mechanism, ARM Pointer Authentication, a security feature that is used to enforce pointer integrity," MIT researchers Joseph Ravichandran, Weon Taek Na, Jay Lang, and Mengjia Yan  said  in a new paper. What's more concerning is that "while the hardware mechanisms used by PACMAN cannot be patched with software features, memory corruption bugs can be," the researchers added. The vulnerability is rooted in pointer authentication codes ( PACs ), a line of defense introduced in arm64e architecture that aims to detect and secure against unexpected changes to  pointers  — objects that reference an address location in memory. PACs aim to solve a common problem in software
NVIDIA Jetson Chipsets Found Vulnerable to High-severity Flaws

NVIDIA Jetson Chipsets Found Vulnerable to High-severity Flaws

June 22, 2021Ravie Lakshmanan
U.S. graphics chip specialist NVIDIA has released  software updates  to address a total of 26 vulnerabilities impacting its Jetson system-on-module (SOM) series that could be abused by adversaries to escalate privileges and even lead to denial-of-service and information disclosure. Tracked from CVE‑2021‑34372 through CVE‑2021‑34397, the flaws affect products Jetson TX1, TX2 series, TX2 NX, AGX Xavier series, Xavier NX, and Nano and Nano 2GB running all Jetson Linux versions prior to 32.5.1. The company credited Frédéric Perriot of Apple Media Products for reporting all the issues. The  NVIDIA Jetson  line consists of embedded Linux AI and computer vision compute modules and developer kits that primarily caters to AI-based computer vision applications and autonomous systems such as mobile robots and drones. Chief among the vulnerabilities is CVE‑2021‑34372 (CVSS score: 8.2), a buffer overflow flaw in its  Trusty  trusted execution environment (TEE) that could result in informatio
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