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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "GSDK", "vendor": "silabs.com", "versions": [{"lessThan": "4.4.0", "status": "affected", "version": "1.0", "versionType": "patch"}]}], "source": "product-security@silabs.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:silabs:gecko_software_development_kit:*:*:*:*:*:*:*:*", "matchCriteriaId": "1CCF9CCF-153F-40B5-941A-A430C146C3BA", "versionEndExcluding": "4.4.0", "versionStartIncluding": "1.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Una entrada no validada en una funci\u00f3n de librer\u00eda responsable de la comunicaci\u00f3n entre la memoria segura y no segura en la implementaci\u00f3n TrustZone de Silicon Labs permite la lectura/escritura de la memoria en la regi\u00f3n segura de la memoria desde la regi\u00f3n no segura de la memoria."}], "id": "CVE-2023-4020", "lastModified": "2026-06-17T06:36:55.697", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 9.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.8, "source": "product-security@silabs.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2023-12-15T21:15:08.560", "references": [{"source": "product-security@silabs.com", "tags": ["Permissions Required"], "url": "https://community.silabs.com/069Vm0000004b95IAA"}, {"source": "product-security@silabs.com", "tags": ["Release Notes"], "url": "https://github.com/SiliconLabs/gecko_sdk/releases"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Permissions Required"], "url": "https://community.silabs.com/069Vm0000004b95IAA"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes"], "url": "https://github.com/SiliconLabs/gecko_sdk/releases"}], "sourceIdentifier": "product-security@silabs.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-787"}], "source": "product-security@silabs.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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