---
cve: "CVE-2023-4020"
severity: "CRITICAL"
cvss: 9.0
epss: "57%"
vendor: "silabs.com"
kev: false
exploited: false
published: "2023-12-15 21:15:08"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T05:41:39+02:00"
---

# CVE-2023-4020

> 9.0 CRITICAL · 🧪 PoC

## Beschreibung

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-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 124fa19de8c8b3961d21c20857f7df32239786da (Commit)

## Referenzen

- <https://github.com/SiliconLabs/gecko_sdk/releases>
- <https://community.silabs.com/069Vm0000004b95IAA>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2023-4020) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_