CVE-2023-4020

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    CVE-2023-4020

    Published: 15 Dec 2023Last Modified: 12 Aug 2026

    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.

    References: https://community.silabs.com/069Vm0000004b95IAA, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4020.json, https://nvd.nist.gov/vuln/detail/CVE-2023-4020, https://github.com/SiliconLabs/gecko_sdk/releases

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -124fa19de8c8b3961d21c20857f7df32239786da

    Affected versions

    v4.3.2
    v4.3.1
    v4.3.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2023-4020 | CVE-DB