CVE-2018-18056
Severity CVSS v4.0:
Pending analysis
Type:
CWE-200
Information Leak / Disclosure
Publication date:
20/08/2019
Last modified:
12/09/2019
Description
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. Based on the gathered information, it is possible to reverse-engineer the executed instructions. The processor acts as a kind of "instruction oracle."
Impact
Base Score 3.x
4.60
Severity 3.x
MEDIUM
Base Score 2.0
2.10
Severity 2.0
LOW
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:o:ti:tm4c123_firmware:-:*:*:*:*:*:*:* | ||
| cpe:2.3:h:ti:tm4c123:-:*:*:*:*:*:*:* | ||
| cpe:2.3:o:ti:tm4c129_firmware:-:*:*:*:*:*:*:* | ||
| cpe:2.3:h:ti:tm4c129:-:*:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page