CVE-2023-4020

Silabs Gecko Software Development Kit vulnerability

9.0 CRITICALEPSS 0.57%

Published15 Dec 2023

Description

An unvalidated input in a library function responsible for communicating between secure and non-secure memory in Silicon Labs TrustZone implementation allows reading/writing of memory in the secure region of memory from the non-secure region of memory.

CVSS 3.1 breakdown

Attack vectorLocal

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeChanged

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Affected products

Silabs Gecko Software Development Kit≥ 1.0.0 < 4.4.0

Remediation

Fixed in

Silabs Gecko Software Development Kit≥ 4.4.0

Frequently asked

Is CVE-2023-4020 being actively exploited?

CVE-2023-4020 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.57%.

How severe is CVE-2023-4020?

CVE-2023-4020 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 0.57% probability of exploitation.

Which products are affected by CVE-2023-4020?

Affected products include Silabs Gecko Software Development Kit.

How do I fix CVE-2023-4020?

Upgrade affected software to a fixed version, for example Silabs Gecko Software Development Kit 4.4.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-4020 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation works Book a demo

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.