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Malformed SPI in response for eswifi can corrupt kernel memory

High
d3zd3z published GHSA-hx4p-j86p-2mhr Apr 26, 2021

Package

zephyr (west)

Affected versions

1.14.2, 2.3.0

Patched versions

2.4.0

Description

Impact

A local attacker able to interfere with the physical SPI bus between the Host and target SoC may send a malformed SPI response that will corrupt kernel's memory in the Host MCU, thus potentially achieving local code execution with kernel privileges.

Patches

This has been fixed in:

For more information

If you have any questions or comments about this advisory:

embargo: 2020-10-07
zepsec: ZEPSEC-91
thanks: Ruben Santamarta, IOActive

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Physical
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

CVE ID

CVE-2020-13600

Weaknesses