UBUNTU-CVE-2023-40660

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    UBUNTU-CVE-2023-40660

    Published: 6 Nov 2023Last Modified: 4 Feb 2026
    Upstream:
    CVE-2023-40660

    Summary:

    Details: A flaw was found in OpenSC packages that allow a potential PIN bypass. When a token/card is authenticated by one process, it can perform cryptographic operations in other processes when an empty zero-length pin is passed. This issue poses a security risk, particularly for OS logon/screen unlock and for small, permanently connected tokens to computers. Additionally, the token can internally track login status. This flaw allows an attacker to gain unauthorized access, carry out malicious actions, or compromise the system without the user's awareness.

    References: https://ubuntu.com/security/CVE-2023-40660, https://access.redhat.com/security/cve/CVE-2023-40660, https://www.cve.org/CVERecord?id=CVE-2023-40660, https://ubuntu.com/security/notices/USN-7346-1, https://ubuntu.com/security/notices/USN-7346-3

    Affected packages

    Package

    Name: opensc

    Purl: pkg:deb/ubuntu/[email protected]~esm4?arch=source&distro=esm-apps/focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.20.0-3ubuntu0.1~esm4

    Affected versions

    0.19.0-2

    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
    UBUNTU-CVE-2023-40660 | CVE-DB