CVE-2018-18056

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Summary

CVECVE-2018-18056
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-08-20 17:15:00 UTC
Updated2019-09-12 18:15:00 UTC
DescriptionAn 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. Based on the gathered information, it is possible to reverse-engineer the executed instructions. The processor acts as a kind of "instruction oracle."

Risk And Classification

Problem Types: CWE-200

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Ti Tm4c123 - All All All
Hardware Ti Tm4c123 - All All All
Operating System Ti Tm4c123 Firmware - All All All
Operating System Ti Tm4c123 Firmware - All All All
Hardware Ti Tm4c129 - All All All
Hardware Ti Tm4c129 - All All All
Operating System Ti Tm4c129 Firmware - All All All
Operating System Ti Tm4c129 Firmware - All All All

References

ReferenceSourceLinkTags
Taking a Look into Execute-Only Memory | USENIX MISC www.usenix.org Technical Description, Third Party Advisory
www.usenix.org/system/files/woot19-paper_schink.pdf MISC www.usenix.org Technical Description, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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