UBUNTU-CVE-2023-4693

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    UBUNTU-CVE-2023-4693

    Published: 3 Oct 2023Last Modified: 4 Feb 2026
    Upstream:
    CVE-2023-4693
    Aliases:
    USN-6410-1

    Summary:

    Details: An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk.

    References: https://ubuntu.com/security/CVE-2023-4693, https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html, https://ubuntu.com/security/notices/USN-6410-1, https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/, https://www.cve.org/CVERecord?id=CVE-2023-4693

    Affected packages

    Package

    Name: grub2-signed

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=esm-infra-legacy/trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.22

    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-2023-4693 | CVE-DB