EulerOS Virtualization 2.11.0 : systemd (EulerOS-SA-2026-3565)

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

include('compat.inc');

if (description)
{
  script_id(347066);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/18");

  script_cve_id(
    "CVE-2025-4598",
    "CVE-2026-4105",
    "CVE-2026-29111",
    "CVE-2026-40225",
    "CVE-2026-40226"
  );

  script_name(english:"EulerOS Virtualization 2.11.0 : systemd (EulerOS-SA-2026-3565)");

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

    A vulnerability was found in systemd-coredump. This flaw allows an attacker to force a SUID process to
    crash and replace it with a non-SUID binary to access the original's privileged process coredump, allowing
    the attacker to read sensitive data, such as /etc/shadow content, loaded by the original process.A SUID
    binary or process has a special type of permission, which allows the process to run with the file owner's
    permissions, regardless of the user executing the binary. This allows the process to access more
    restricted data than unprivileged users or processes would be able to. An attacker can leverage this flaw
    by forcing a SUID process to crash and force the Linux kernel to recycle the process PID before systemd-
    coredump can analyze the /proc/pid/auxv file. If the attacker wins the race condition, they gain access to
    the original's SUID process coredump file. They can read sensitive content loaded into memory by the
    original binary, affecting data confidentiality.(CVE-2025-4598)

    systemd, a system and service manager, (as PID 1) hits an assert and freezes execution when an
    unprivileged IPC API call is made with spurious data. On version v249 and older the effect is not an
    assert, but stack overwriting, with the attacker controlled content. From version v250 and newer this is
    not possible as the safety check causes an assert instead. This IPC call was added in v239, so versions
    older than that are not affected. Versions 260-rc1, 259.2, 258.5, and 257.11 contain patches. No known
    workarounds are available.(CVE-2026-29111)

    A flaw was found in systemd. The systemd-machined service contains an Improper Access Control
    vulnerability due to insufficient validation of the class parameter in the RegisterMachine D-Bus (Desktop
    Bus) method. A local unprivileged user can exploit this by attempting to register a machine with a
    specific class value, which may leave behind a usable, attacker-controlled machine object. This allows the
    attacker to invoke methods on the privileged object, leading to the execution of arbitrary commands with
    root privileges on the host system.(CVE-2026-4105)

    In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional
    config file.(CVE-2026-40226)

    In udev in systemd before 260, local root execution can occur via malicious hardware devices and
    unsanitized kernel output.(CVE-2026-40225)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization systemd 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-2026-3565
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?718a91d2");
  script_set_attribute(attribute:"solution", value:
"Update the affected systemd packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:P/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-4598");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-4105");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/05/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-container");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-help");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-networkd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-nspawn");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-pam");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-resolved");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-timesyncd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-udev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-udev-compat");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.11.0");
  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 != "2.11.0") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.11.0");
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 = [
  "systemd-249-16.h88.eulerosv2r11",
  "systemd-container-249-16.h88.eulerosv2r11",
  "systemd-devel-249-16.h88.eulerosv2r11",
  "systemd-help-249-16.h88.eulerosv2r11",
  "systemd-libs-249-16.h88.eulerosv2r11",
  "systemd-networkd-249-16.h88.eulerosv2r11",
  "systemd-nspawn-249-16.h88.eulerosv2r11",
  "systemd-pam-249-16.h88.eulerosv2r11",
  "systemd-resolved-249-16.h88.eulerosv2r11",
  "systemd-timesyncd-249-16.h88.eulerosv2r11",
  "systemd-udev-249-16.h88.eulerosv2r11",
  "systemd-udev-compat-249-16.h88.eulerosv2r11"
];

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

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    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, "systemd");
}