Linux Distros Unpatched Vulnerability : CVE-2025-0624

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(230685);
  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/22");

  script_cve_id("CVE-2025-0624");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2025-0624");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - A flaw was found in grub2. During the network boot process, when trying to search for the configuration
    file, grub copies data from a user controlled environment variable into an internal buffer using the
    grub_strcpy() function. During this step, it fails to consider the environment variable length when
    allocating the internal buffer, resulting in an out-of-bounds write. If correctly exploited, this issue
    may result in remote code execution through the same network segment grub is searching for the boot
    information, which can be used to by-pass secure boot protections. (CVE-2025-0624)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-0624");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2025-0624");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-0624");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/02/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:grub2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:grub2-signed");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:grub2-unsigned");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub2");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("set_linux_os_id.nasl", "ssh_get_info2.nasl");
  script_require_keys("Host/OS/identifier", "Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched");
  script_require_ports("Host/OS/Debian Linux-11", "Host/OS/Ubuntu Linux-14.04", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04", "Host/OS/Ubuntu Linux-22.04", "Host/OS/Ubuntu Linux-24.04", "Host/OS/Ubuntu Linux-25.04", "Host/OS/Ubuntu Linux-25.10");

  exit(0);
}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/Debian/dpkg-l"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Debian Linux-11": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "11",
        "pkgs": [
          {"reference": "grub-common"},
          {"reference": "grub-coreboot"},
          {"reference": "grub-coreboot-bin"},
          {"reference": "grub-coreboot-dbg"},
          {"reference": "grub-efi"},
          {"reference": "grub-efi-amd64"},
          {"reference": "grub-efi-amd64-bin"},
          {"reference": "grub-efi-amd64-dbg"},
          {"reference": "grub-efi-amd64-signed-template"},
          {"reference": "grub-efi-arm"},
          {"reference": "grub-efi-arm-bin"},
          {"reference": "grub-efi-arm-dbg"},
          {"reference": "grub-efi-arm64"},
          {"reference": "grub-efi-arm64-bin"},
          {"reference": "grub-efi-arm64-dbg"},
          {"reference": "grub-efi-arm64-signed-template"},
          {"reference": "grub-efi-ia32"},
          {"reference": "grub-efi-ia32-bin"},
          {"reference": "grub-efi-ia32-dbg"},
          {"reference": "grub-efi-ia32-signed-template"},
          {"reference": "grub-efi-ia64"},
          {"reference": "grub-efi-ia64-bin"},
          {"reference": "grub-efi-ia64-dbg"},
          {"reference": "grub-emu"},
          {"reference": "grub-emu-dbg"},
          {"reference": "grub-firmware-qemu"},
          {"reference": "grub-ieee1275"},
          {"reference": "grub-ieee1275-bin"},
          {"reference": "grub-ieee1275-dbg"},
          {"reference": "grub-linuxbios"},
          {"reference": "grub-mount-udeb"},
          {"reference": "grub-pc"},
          {"reference": "grub-pc-bin"},
          {"reference": "grub-pc-dbg"},
          {"reference": "grub-rescue-pc"},
          {"reference": "grub-theme-starfield"},
          {"reference": "grub-uboot"},
          {"reference": "grub-uboot-bin"},
          {"reference": "grub-uboot-dbg"},
          {"reference": "grub-xen"},
          {"reference": "grub-xen-bin"},
          {"reference": "grub-xen-dbg"},
          {"reference": "grub-xen-host"},
          {"reference": "grub-yeeloong"},
          {"reference": "grub-yeeloong-bin"},
          {"reference": "grub-yeeloong-dbg"},
          {"reference": "grub2"},
          {"reference": "grub2-common"}
        ]
      }
    ]
  },
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "grub-common"},
          {"reference": "grub-coreboot"},
          {"reference": "grub-coreboot-bin"},
          {"reference": "grub-coreboot-dbg"},
          {"reference": "grub-efi"},
          {"reference": "grub-efi-amd64"},
          {"reference": "grub-efi-amd64-bin"},
          {"reference": "grub-efi-amd64-dbg"},
          {"reference": "grub-efi-amd64-signed"},
          {"reference": "grub-efi-arm"},
          {"reference": "grub-efi-arm-bin"},
          {"reference": "grub-efi-arm-dbg"},
          {"reference": "grub-efi-arm64"},
          {"reference": "grub-efi-arm64-bin"},
          {"reference": "grub-efi-arm64-dbg"},
          {"reference": "grub-efi-ia32"},
          {"reference": "grub-efi-ia32-bin"},
          {"reference": "grub-efi-ia32-dbg"},
          {"reference": "grub-efi-ia64"},
          {"reference": "grub-efi-ia64-bin"},
          {"reference": "grub-efi-ia64-dbg"},
          {"reference": "grub-emu"},
          {"reference": "grub-emu-dbg"},
          {"reference": "grub-firmware-qemu"},
          {"reference": "grub-ieee1275"},
          {"reference": "grub-ieee1275-bin"},
          {"reference": "grub-ieee1275-dbg"},
          {"reference": "grub-linuxbios"},
          {"reference": "grub-mount-udeb"},
          {"reference": "grub-pc"},
          {"reference": "grub-pc-bin"},
          {"reference": "grub-pc-dbg"},
          {"reference": "grub-rescue-pc"},
          {"reference": "grub-theme-starfield"},
          {"reference": "grub-uboot"},
          {"reference": "grub-uboot-bin"},
          {"reference": "grub-uboot-dbg"},
          {"reference": "grub-xen"},
          {"reference": "grub-xen-bin"},
          {"reference": "grub-xen-dbg"},
          {"reference": "grub-yeeloong"},
          {"reference": "grub-yeeloong-bin"},
          {"reference": "grub-yeeloong-dbg"},
          {"reference": "grub2"},
          {"reference": "grub2-common"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "grub-efi-amd64-signed"},
          {"reference": "grub-efi-arm64-signed"},
          {"reference": "grub2-unsigned"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "grub-efi-amd64-signed"},
          {"reference": "grub-efi-arm64-signed"},
          {"reference": "grub2-unsigned"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "grub-efi-amd64-signed"},
          {"reference": "grub-efi-arm64-signed"},
          {"reference": "grub2-unsigned"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "grub-efi-amd64"},
          {"reference": "grub-efi-amd64-bin"},
          {"reference": "grub-efi-amd64-dbg"},
          {"reference": "grub-efi-amd64-signed"},
          {"reference": "grub-efi-arm64"},
          {"reference": "grub-efi-arm64-bin"},
          {"reference": "grub-efi-arm64-dbg"},
          {"reference": "grub-efi-arm64-signed"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "grub-efi-amd64"},
          {"reference": "grub-efi-amd64-bin"},
          {"reference": "grub-efi-amd64-dbg"},
          {"reference": "grub-efi-amd64-signed"},
          {"reference": "grub-efi-arm64"},
          {"reference": "grub-efi-arm64-bin"},
          {"reference": "grub-efi-arm64-dbg"},
          {"reference": "grub-efi-arm64-signed"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.04",
        "pkgs": [
          {"reference": "grub-efi-amd64"},
          {"reference": "grub-efi-amd64-bin"},
          {"reference": "grub-efi-amd64-dbg"},
          {"reference": "grub-efi-amd64-signed"},
          {"reference": "grub-efi-amd64-unsigned"},
          {"reference": "grub-efi-arm64"},
          {"reference": "grub-efi-arm64-bin"},
          {"reference": "grub-efi-arm64-dbg"},
          {"reference": "grub-efi-arm64-signed"},
          {"reference": "grub-efi-arm64-unsigned"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "grub-efi-amd64"},
          {"reference": "grub-efi-amd64-bin"},
          {"reference": "grub-efi-amd64-dbg"},
          {"reference": "grub-efi-amd64-signed"},
          {"reference": "grub-efi-amd64-unsigned"},
          {"reference": "grub-efi-arm64"},
          {"reference": "grub-efi-arm64-bin"},
          {"reference": "grub-efi-arm64-dbg"},
          {"reference": "grub-efi-arm64-signed"},
          {"reference": "grub-efi-arm64-unsigned"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}