CVE-2018-18056

https://notcve.org/view.php?id=CVE-2018-18056

An issue was discovered in the Texas Instruments (TI) TM4C, MSP432E and MSP432P microcontroller series. The eXecute-Only-Memory (XOM) implementation prevents code read-outs on protected memory by generating bus faults. However, single-stepping and using breakpoints is allowed in XOM-protected flash memory. As a consequence, it is possible to execute single instructions with arbitrary system states (e.g., registers, status flags, and SRAM content) and observe the state changes produced by the unknown instruction. An attacker could exploit this vulnerability by executing protected and unknown instructions with specific system states and observing the state changes. • https://www.usenix.org/conference/woot19/presentation/schink https://www.usenix.org/system/files/woot19-paper_schink.pdf • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •