CVE-2020-36478

    Dashboard / Vulnerabilities / CVE-2020-36478

    CVE-2020-36478

    Published: 23 Aug 2021Last Modified: 27 Aug 2026

    Summary:

    Details: An issue was discovered in Mbed TLS before 2.25.0 (and before 2.16.9 LTS and before 2.7.18 LTS). A NULL algorithm parameters entry looks identical to an array of REAL (size zero) and thus the certificate is considered valid. However, if the parameters do not match in any way, then the certificate should be considered invalid.

    References: https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9, https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0, https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18, https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html, https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html, https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf, https://github.com/ARMmbed/mbedtls/issues/3629

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -78d9663acec4ac72af43e2db57fc73a24e856108

    Affected versions

    v2.24.0

    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-2020-36478 | CVE-DB