{"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 función de librería responsable de la comunicación entre la memoria segura y no segura en la implementación TrustZone de Silicon Labs permite la lectura/escritura de la memoria en la región segura de la memoria desde la región 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"}]}