Debian dla-4685 : grub-common - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-4685. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(327092);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/15");

  script_cve_id(
    "CVE-2024-45774",
    "CVE-2024-45775",
    "CVE-2024-45776",
    "CVE-2024-45777",
    "CVE-2024-45778",
    "CVE-2024-45779",
    "CVE-2024-45780",
    "CVE-2024-45781",
    "CVE-2024-45782",
    "CVE-2024-45783",
    "CVE-2025-0622",
    "CVE-2025-0624",
    "CVE-2025-0677",
    "CVE-2025-0678",
    "CVE-2025-0684",
    "CVE-2025-0685",
    "CVE-2025-0686",
    "CVE-2025-0689",
    "CVE-2025-0690",
    "CVE-2025-1118",
    "CVE-2025-1125"
  );

  script_name(english:"Debian dla-4685 : grub-common - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-4685 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4685-1                [email protected]
    https://www.debian.org/lts/security/               Emilio Pozuelo Monfort
    July 15, 2026                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : grub2
    Version        : 2.06-3~deb11u7
    CVE ID         : CVE-2024-45774 CVE-2024-45775 CVE-2024-45776 CVE-2024-45777
                     CVE-2024-45778 CVE-2024-45779 CVE-2024-45780 CVE-2024-45781
                     CVE-2024-45782 CVE-2024-45783 CVE-2025-0622 CVE-2025-0624
                     CVE-2025-0677 CVE-2025-0678 CVE-2025-0684 CVE-2025-0685
                     CVE-2025-0686 CVE-2025-0689 CVE-2025-0690 CVE-2025-1118
                     CVE-2025-1125

    Several issues were found in the GRUB2 bootloader, which could result
    in crashes and potentially execution of arbitrary code. These could
    lead to bypass of UEFI Secure Boot on affected systems.

    For Debian 11 bullseye, these problems have been fixed in version
    2.06-3~deb11u7.

    We recommend that you upgrade your grub2 packages.

    For the detailed security status of grub2 please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/grub2

    Further information about Debian LTS security advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/grub2");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-45774");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-45775");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-45776");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-45777");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-45778");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-45779");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-45780");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-45781");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-45782");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-45783");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-0622");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-0624");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-0677");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-0678");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-0684");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-0685");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-0686");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-0689");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-0690");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-1118");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-1125");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/grub2");
  script_set_attribute(attribute:"solution", value:
"Upgrade the grub-common packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-1125");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/04/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-efi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-efi-arm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-efi-arm-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-efi-arm-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-efi-arm64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-efi-arm64-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-efi-arm64-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-efi-arm64-signed-template");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-mount-udeb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-theme-starfield");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-uboot");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-uboot-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub-uboot-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:grub2-common");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

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

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(11)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 11.0', 'Debian ' + debian_release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '11.0', 'prefix': 'grub-common', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-efi', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-efi-arm', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-efi-arm-bin', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-efi-arm-dbg', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-efi-arm64', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-efi-arm64-bin', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-efi-arm64-dbg', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-efi-arm64-signed-template', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-mount-udeb', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-theme-starfield', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-uboot', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-uboot-bin', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub-uboot-dbg', 'reference': '2.06-3~deb11u7'},
    {'release': '11.0', 'prefix': 'grub2-common', 'reference': '2.06-3~deb11u7'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var _release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (_release && prefix && reference) {
    if (deb_check(release:_release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'grub-common / grub-efi / grub-efi-arm / grub-efi-arm-bin / etc');
}