CVE-2018-18056
CVSS V2 Low 2.1
CVSS V3 Medium 4.6
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."
Overview
- CVE ID
- CVE-2018-18056
- Assigner
- cve@mitre.org
- Vulnerability Status
- Modified
- Published Version
- 2019-08-20T17:15:11
- Last Modified Date
- 2019-09-12T18:15:10
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:ti:tm4c123_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:ti:tm4c123:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:ti:tm4c129_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:ti:tm4c129:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:N/A:N
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 2.1
- Severity
- LOW
- Exploitability Score
- 3.9
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.0
- Vector String
- CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Attack Vector
- PHYSICAL
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 4.6
- Base Severity
- MEDIUM
- Exploitability Score
- 0.9
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://www.usenix.org/system/files/woot19-paper_schink.pdf | Technical Description Third Party Advisory |
| https://www.usenix.org/conference/woot19/presentation/schink | Technical Description Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2018-18056 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18056 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:46:25 | Added to TrackCVE | |||
| 2022-12-04 01:25:14 | 2019-08-20T17:15Z | 2019-08-20T17:15:11 | CVE Published Date | updated |
| 2022-12-04 01:25:14 | 2019-09-12T18:15:10 | CVE Modified Date | updated | |
| 2022-12-04 01:25:14 | Modified | Vulnerability Status | updated | |
| 2022-12-31 00:11:02 | Modified | Undergoing Analysis | Vulnerability Status | updated |
| 2022-12-31 04:11:15 | Undergoing Analysis | Modified | Vulnerability Status | updated |