openSUSE 16 Security Update : grub2 (openSUSE-SU-2025:20163-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# openSUSE Security Update openSUSE-SU-2025:20163-1. The text itself
# is copyright (C) SUSE.
##

include('compat.inc');

if (description)
{
  script_id(279059);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/17");

  script_cve_id(
    "CVE-2024-56738",
    "CVE-2025-54770",
    "CVE-2025-54771",
    "CVE-2025-61661",
    "CVE-2025-61662",
    "CVE-2025-61663",
    "CVE-2025-61664"
  );

  script_name(english:"openSUSE 16 Security Update : grub2 (openSUSE-SU-2025:20163-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote openSUSE host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the
openSUSE-SU-2025:20163-1 advisory.

    Changes in grub2:

    - CVE-2025-54771: Fixed grub_file_close() does not properly controls the fs refcount (bsc#1252931)
    - CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free
    (bsc#1252930)
    - CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free
    (bsc#1252933)
    - CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free
    (bsc#1252934)
    - CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free
    (bsc#1252935)
    - CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)

    - Bump upstream SBAT generation to 6

    - Fix sparse file not allowed error after grub2-reboot (bsc#1245738)
    - Fix PowerPC network boot prefix to correctly locate grub.cfg (bsc#1249385)
    - turn off page flipping for i386-pc using VBE video backend (bsc#1245636)
    - Fix boot hangs in setting up serial console when ACPI SPCR table is present
      and redirection is disabled (bsc#1249088)
    - Fix timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)
    - Skip mount point in grub_find_device function (bsc#1246231)

    - CVE-2024-56738: Fixed side-channel attack due to not constant-time algorithm in grub_crypto_memcmp
    (bsc#1234959)

Tenable has extracted the preceding description block directly from the SUSE 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://bugzilla.suse.com/1234959");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1245636");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1245738");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1245953");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1246231");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1247242");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1249088");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1249385");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1252930");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1252931");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1252932");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1252933");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1252934");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1252935");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2024-56738");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2025-54770");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2025-54771");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2025-61661");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2025-61662");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2025-61663");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2025-61664");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/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:L/UI:N/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-2025-61662");

  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:"2024/12/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/12/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/12/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-arm64-efi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-arm64-efi-bls");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-arm64-efi-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-arm64-efi-extras");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-branding-upstream");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-i386-pc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-i386-pc-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-i386-pc-extras");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-powerpc-ieee1275");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-powerpc-ieee1275-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-powerpc-ieee1275-extras");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-s390x-emu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-s390x-emu-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-s390x-emu-extras");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-snapper-plugin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-systemd-sleep-plugin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-x86_64-efi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-x86_64-efi-bls");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-x86_64-efi-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-x86_64-efi-extras");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-x86_64-xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-x86_64-xen-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:grub2-x86_64-xen-extras");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:16.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

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

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/SuSE/release');
if (isnull(os_release) || os_release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, 'openSUSE');
var _os_ver = pregmatch(pattern: "^SUSE([\d.]+)", string:os_release);
if (isnull(_os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'openSUSE');
_os_ver = _os_ver[1];
if (os_release !~ "^(SUSE16\.0)$") audit(AUDIT_OS_RELEASE_NOT, 'openSUSE', '16.0', os_release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'openSUSE ' + _os_ver, cpu);

var pkgs = [
    {'reference':'grub2-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-arm64-efi-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-arm64-efi-bls-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-arm64-efi-debug-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-arm64-efi-extras-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-branding-upstream-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-common-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-i386-pc-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-i386-pc-debug-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-i386-pc-extras-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-powerpc-ieee1275-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-powerpc-ieee1275-debug-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-powerpc-ieee1275-extras-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-s390x-emu-2.12-160000.3.1', 'cpu':'s390x', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-s390x-emu-debug-2.12-160000.3.1', 'cpu':'s390x', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-s390x-emu-extras-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-snapper-plugin-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-systemd-sleep-plugin-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-x86_64-efi-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-x86_64-efi-bls-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-x86_64-efi-debug-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-x86_64-efi-extras-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-x86_64-xen-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-x86_64-xen-debug-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'grub2-x86_64-xen-extras-2.12-160000.3.1', 'release':'SUSE16.0', 'rpm_spec_vers_cmp':TRUE}
];

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

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'grub2 / grub2-arm64-efi / grub2-arm64-efi-bls / etc');
}