EulerOS Virtualization 2.10.0 : kernel (EulerOS-SA-2026-3863)

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

include('compat.inc');

if (description)
{
  script_id(348523);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/22");

  script_cve_id(
    "CVE-2026-31662",
    "CVE-2026-43093",
    "CVE-2026-43139",
    "CVE-2026-43158",
    "CVE-2026-43190",
    "CVE-2026-43194",
    "CVE-2026-43339",
    "CVE-2026-43450",
    "CVE-2026-43452",
    "CVE-2026-43499",
    "CVE-2026-45840",
    "CVE-2026-45843",
    "CVE-2026-45852",
    "CVE-2026-45856",
    "CVE-2026-46021",
    "CVE-2026-46023",
    "CVE-2026-46033",
    "CVE-2026-46052",
    "CVE-2026-46133",
    "CVE-2026-46177",
    "CVE-2026-46189",
    "CVE-2026-46209",
    "CVE-2026-46227",
    "CVE-2026-46259",
    "CVE-2026-46294",
    "CVE-2026-46320",
    "CVE-2026-46321",
    "CVE-2026-46322",
    "CVE-2026-46331",
    "CVE-2026-52923",
    "CVE-2026-53163",
    "CVE-2026-53176",
    "CVE-2026-53194"
  );

  script_name(english:"EulerOS Virtualization 2.10.0 : kernel (EulerOS-SA-2026-3863)");

  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 kernel packages installed, the EulerOS Virtualization installation on the remote host
is affected by the following vulnerabilities :

    A flaw was found in the cifs-utils package where the cifs.upcall helper fails to securely drop its root
    privileges before looking up user information inside a user-controlled environment. A local, low
    privileged attacker can exploit this by using a crafted request_key payload to trick the root-owned helper
    into entering a custom environment (namespace) containing a malicious NSS module. This forces the system
    to load the attacker's controlled NSS Module and configuration, allowing them to execute arbitrary
    commands as the root user, elevating their privileges and fully compromising the system.(CVE-2026-12505)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization kernel 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-2026-3863
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?87f194e5");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel 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:H/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:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-46294");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/03/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:bpftool");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-abi-stablelists");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-tools-libs-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python3-perf");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.10.0");
  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) 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/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 != "2.10.0") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.10.0");
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$" && "aarch64" >!< cpu && "x86" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "x86" >!< cpu) audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

var flag = 0;

var pkgs = [
  "bpftool-4.18.0-147.5.2.19.h2028.eulerosv2r10",
  "kernel-4.18.0-147.5.2.19.h2028.eulerosv2r10",
  "kernel-abi-stablelists-4.18.0-147.5.2.19.h2028.eulerosv2r10",
  "kernel-tools-4.18.0-147.5.2.19.h2028.eulerosv2r10",
  "kernel-tools-libs-4.18.0-147.5.2.19.h2028.eulerosv2r10",
  "kernel-tools-libs-devel-4.18.0-147.5.2.19.h2028.eulerosv2r10",
  "perf-4.18.0-147.5.2.19.h2028.eulerosv2r10",
  "python3-perf-4.18.0-147.5.2.19.h2028.eulerosv2r10"
];

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, "kernel");
}