EulerOS Virtualization 2.13.1 : grub2 (EulerOS-SA-2025-2164)

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

include('compat.inc');

if (description)
{
  script_id(265124);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/09/16");

  script_cve_id(
    "CVE-2024-45774",
    "CVE-2024-45775",
    "CVE-2024-45776",
    "CVE-2024-45781",
    "CVE-2024-45783",
    "CVE-2024-49504",
    "CVE-2025-0622"
  );

  script_name(english:"EulerOS Virtualization 2.13.1 : grub2 (EulerOS-SA-2025-2164)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the grub2 packages installed, the EulerOS Virtualization installation on the remote host is
affected by the following vulnerabilities :

    A flaw was found in command/gpg. In some scenarios, hooks created by loaded modules are not removed when
    the related module is unloaded. This flaw allows an attacker to force grub2 to call the hooks once the
    module that registered it was unloaded, leading to a use-after-free vulnerability. If correctly exploited,
    this vulnerability may result in arbitrary code execution, eventually allowing the attacker to bypass
    secure boot protections.(CVE-2025-0622)

    A flaw was found in grub2. When failing to mount an HFS+ grub, the hfsplus filesystem driver doesn't
    properly set an ERRNO value. This issue may lead to a NULL pointer access.(CVE-2024-45783)

    A flaw was found in grub2 where the grub_extcmd_dispatcher() function calls grub_arg_list_alloc() to
    allocate memory for the grub's argument list. However, it fails to check in case the memory allocation
    fails. Once the allocation fails, a NULL point will be processed by the parse_option() function, leading
    grub to crash or, in some rare scenarios, corrupt the IVT data.(CVE-2024-45775)

    When reading the language .mo file in grub_mofile_open(), grub2 fails to verify an integer overflow when
    allocating its internal buffer. A crafted .mo file may lead the buffer size calculation to overflow,
    leading to out-of-bound reads and writes. This flaw allows an attacker to leak sensitive data or overwrite
    critical data, possibly circumventing secure boot protections.(CVE-2024-45776)

    A flaw was found in grub2. A specially crafted JPEG file can cause the JPEG parser of grub2 to incorrectly
    check the bounds of its internal buffers, resulting in an out-of-bounds write. The possibility of
    overwriting sensitive information to bypass secure boot protections is not discarded.(CVE-2024-45774)

    A flaw was found in grub2. When reading a symbolic link's name from a UFS filesystem, grub2 fails to
    validate the string length taken as an input. The lack of validation may lead to a heap out-of-bounds
    write, causing data integrity issues and eventually allowing an attacker to circumvent secure boot
    protections.(CVE-2024-45781)

    grub2 allowed attackers with access to the grub shell to access files on the encrypted
    disks.(CVE-2024-49504)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization grub2 security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2025-2164
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?42d2876a");
  script_set_attribute(attribute:"solution", value:
"Update the affected grub2 packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:M/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:H/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:"cvss4_vector", value:"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-45781");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2024-49504");

  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:"2025/09/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/09/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-efi-x64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-efi-x64-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-pc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-pc-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-tools-efi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-tools-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-tools-minimal");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.13.1");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Huawei 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_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/uvp_version");

  exit(0);
}

include("rpm.inc");

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

var _release = get_kb_item("Host/EulerOS/release");
if (isnull(_release) || _release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
var uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "2.13.1") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.13.1");
if (!get_kb_item("Host/EulerOS/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$" && "aarch64" >!< cpu && "x86" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);

var flag = 0;

var pkgs = [
  "grub2-common-2.06-44.h10.eulerosv2r13",
  "grub2-efi-x64-2.06-44.h10.eulerosv2r13",
  "grub2-efi-x64-modules-2.06-44.h10.eulerosv2r13",
  "grub2-pc-2.06-44.h10.eulerosv2r13",
  "grub2-pc-modules-2.06-44.h10.eulerosv2r13",
  "grub2-tools-2.06-44.h10.eulerosv2r13",
  "grub2-tools-efi-2.06-44.h10.eulerosv2r13",
  "grub2-tools-extra-2.06-44.h10.eulerosv2r13",
  "grub2-tools-minimal-2.06-44.h10.eulerosv2r13"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", reference:pkg)) 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");
}