{"id":"CVE-2023-4020","summary":"Unvalidated input in Silicon Labs PSA Attestation service leads to secure memory access from non-secure memory","details":"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.","modified":"2026-08-12T03:51:43.696880194Z","published":"2023-12-15T20:37:20.123Z","database_specific":{"cwe_ids":["CWE-125","CWE-787"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4020.json","cna_assigner":"Silabs"},"references":[{"type":"WEB","url":"https://community.silabs.com/069Vm0000004b95IAA"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4020.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-4020"},{"type":"PACKAGE","url":"https://github.com/SiliconLabs/gecko_sdk/releases"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/siliconlabs/gecko_sdk","events":[{"introduced":"0"},{"fixed":"124fa19de8c8b3961d21c20857f7df32239786da"}],"database_specific":{"cpe":"cpe:2.3:a:silabs:gecko_software_development_kit:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.0"},{"fixed":"4.4.0"},{"introduced":"1.0.0"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["v4.3.2","v4.3.1","v4.2.3","v4.3.0","v4.2.2","v4.2.1","v4.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-4020.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"}]}