CVE-2021-43399

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    CVE-2021-43399

    Published: 8 Dec 2021Last Modified: 10 Mar 2026

    Summary:

    Details: The Yubico YubiHSM YubiHSM2 library 2021.08, included in the yubihsm-shell project, does not properly validate the length of some operations including SSH signing requests, and some data operations received from a YubiHSM 2 device.

    References: , https://www.yubico.com/support/security-advisories/ysa-2021-04/, https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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-2021-43399 | CVE-DB