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    CVE-2023-4535

    An out-of-bounds read vulnerability was found in OpenSC packages within the MyEID driver when handling symmetric key encryption. Exploiting this flaw requires an attacker to have physical access to the computer and a specially crafted USB device or smart card. This flaw allows the attacker to manipulate APDU responses and potentially gain unauthorized access to sensitive data, compromising the system's security.

    Published:Sep 25, 2023
    Last Modified:Nov 21, 2025
    EPS:Nov 6, 2023
    EPSS Score:0.00276
    CVSS Score:4.5

    Affected Products

    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Opensc Project
    Product
    Opensc
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

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    References

    https://access.redhat.com/errata/RHSA-2023:7879
    https://access.redhat.com/security/cve/CVE-2023-4535
    https://bugzilla.redhat.com/show_bug.cgi?id=2240914
    https://github.com/OpenSC/OpenSC/commit/f1993dc4e0b33050b8f72a3558ee88b24c4063b2
    https://github.com/OpenSC/OpenSC/issues/2792#issuecomment-1674806651
    https://github.com/OpenSC/OpenSC/releases/tag/0.24.0-rc1
    https://github.com/OpenSC/OpenSC/wiki/OpenSC-security-advisories
    https://access.redhat.com/errata/RHSA-2023:7879
    https://access.redhat.com/security/cve/CVE-2023-4535
    https://bugzilla.redhat.com/show_bug.cgi?id=2240914
    https://github.com/OpenSC/OpenSC/commit/f1993dc4e0b33050b8f72a3558ee88b24c4063b2
    https://github.com/OpenSC/OpenSC/issues/2792#issuecomment-1674806651
    https://github.com/OpenSC/OpenSC/releases/tag/0.24.0-rc1
    https://github.com/OpenSC/OpenSC/wiki/OpenSC-security-advisories
    https://lists.fedoraproject.org/archives/list/[email protected]/message/3CPQOMCDWFRBMEFR5VK4N5MMXXU42ODE/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/GLYEFIBBA37TK3UNMZN5NOJ7IWCIXLQP/

    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