NewStart CGSL MAIN 7.02 : grub2 Multiple Vulnerabilities (NS-SA-2025-0082)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2025-0082. The text
# itself is copyright (C) ZTE, Inc.
##

include('compat.inc');

if (description)
{
  script_id(238000);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/06/18");

  script_cve_id(
    "CVE-2024-45778",
    "CVE-2024-45779",
    "CVE-2024-45782",
    "CVE-2024-56737",
    "CVE-2025-0678",
    "CVE-2025-1125"
  );

  script_name(english:"NewStart CGSL MAIN 7.02 : grub2 Multiple Vulnerabilities (NS-SA-2025-0082)");

  script_set_attribute(attribute:"synopsis", value:
"The remote NewStart CGSL host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote NewStart CGSL host, running version MAIN 7.02, has grub2 packages installed that are affected by multiple
vulnerabilities:

  - A flaw was found in grub2. When reading data from a squash4 filesystem, grub's squash4 fs module uses
    user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it
    improperly checks for integer overflows. A maliciously crafted filesystem may lead some of those buffer
    size calculations to overflow, causing it to perform a grub_malloc() operation with a smaller size than
    expected. As a result, the direct_read() will perform a heap based out-of-bounds write during data
    reading. This flaw may be leveraged to corrupt grub's internal critical data and may result in arbitrary
    code execution, by-passing secure boot protections. (CVE-2025-0678)

  - A stack overflow flaw was found when reading a BFS file system. A crafted BFS filesystem may lead to an
    uncontrolled loop, causing grub2 to crash. (CVE-2024-45778)

  - An integer overflow flaw was found in the BFS file system driver in grub2. When reading a file with an
    indirect extent map, grub2 fails to validate the number of extent entries to be read. A crafted or
    corrupted BFS filesystem may cause an integer overflow during the file reading, leading to a heap of
    bounds read. As a consequence, sensitive data may be leaked, or grub2 will crash. (CVE-2024-45779)

  - A flaw was found in the HFS filesystem. When reading an HFS volume's name at grub_fs_mount(), the HFS
    filesystem driver performs a strcpy() using the user-provided volume name as input without properly
    validating the volume name's length. This issue may read to a heap-based out-of-bounds writer, impacting
    grub's sensitive data integrity and eventually leading to a secure boot protection bypass.
    (CVE-2024-45782)

  - GNU GRUB (aka GRUB2) through 2.12 has a heap-based buffer overflow in fs/hfs.c via crafted sblock data in
    an HFS filesystem. (CVE-2024-56737)

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.gd-linux.com/notice/NS-SA-2025-0082");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2024-45778");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2024-45779");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2024-45782");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2024-56737");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2025-0678");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2025-1125");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL grub2 packages. Note that updated packages may not be available yet. Please contact ZTE for
more information.");
  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-2025-0678");

  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:"2025/05/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/06/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:grub2-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:grub2-efi-x64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:grub2-efi-x64-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:grub2-pc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:grub2-pc-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:grub2-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:grub2-tools-efi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:grub2-tools-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:grub2-tools-minimal");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:zte:cgsl_main:7");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

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

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/ZTE-CGSL/release", "Host/ZTE-CGSL/rpm-list", "Host/cpu");

  exit(0);
}

include('rpm2.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var os_release = get_kb_item('Host/ZTE-CGSL/release');
if (isnull(os_release) || os_release !~ "^CGSL (MAIN|CORE)") audit(AUDIT_OS_NOT, 'NewStart Carrier Grade Server Linux');

if (os_release !~ "CGSL\sMAIN\s7\.02")
  audit(AUDIT_OS_NOT, 'NewStart CGSL MAIN 7.02');

if (!get_kb_item('Host/ZTE-CGSL/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'NewStart Carrier Grade Server Linux', cpu);

var flag = 0;

var pkgs = {
  'CGSL MAIN 7.02': [
    'grub2-common-2.12-8.zncgsl7.13',
    'grub2-efi-x64-2.12-8.zncgsl7.13',
    'grub2-efi-x64-modules-2.12-8.zncgsl7.13',
    'grub2-pc-2.12-8.zncgsl7.13',
    'grub2-pc-modules-2.12-8.zncgsl7.13',
    'grub2-tools-2.12-8.zncgsl7.13',
    'grub2-tools-efi-2.12-8.zncgsl7.13',
    'grub2-tools-extra-2.12-8.zncgsl7.13',
    'grub2-tools-minimal-2.12-8.zncgsl7.13'
  ]
};
var pkg_list = pkgs[os_release];
var pkg;
foreach (pkg in pkg_list)
  if (rpm_check(reference:pkg, release:'ZTE ' + os_release, rpm_spec_vers_cmp:TRUE)) 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');
}