Strix
26.1K

CVE-2023-4020

CRITICALCVSS 9.1/10EPSS 0.57%

Last modified

CVE-2023-4020 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.1/10

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

EPSS Probability
0.57%

42.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
SilabsGecko Software Development Kit>= 1.0.0, < 4.4.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-4020?
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.
How severe is CVE-2023-4020?
CVE-2023-4020 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.
How do I fix CVE-2023-4020?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4020?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST