EulerOS Virtualization 2.11.0 : expat (EulerOS-SA-2026-3500)

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

include('compat.inc');

if (description)
{
  script_id(347293);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/18");

  script_cve_id(
    "CVE-2024-8176",
    "CVE-2024-45490",
    "CVE-2024-45491",
    "CVE-2024-45492",
    "CVE-2024-50602",
    "CVE-2025-59375",
    "CVE-2026-24515",
    "CVE-2026-25210",
    "CVE-2026-32776",
    "CVE-2026-32777",
    "CVE-2026-32778",
    "CVE-2026-41080",
    "CVE-2026-45186"
  );
  script_xref(name:"IAVA", value:"2024-A-0543-S");
  script_xref(name:"IAVA", value:"2024-A-0694-S");
  script_xref(name:"IAVA", value:"2025-A-0186-S");
  script_xref(name:"IAVA", value:"2026-A-0100-S");
  script_xref(name:"IAVA", value:"2026-A-0407-S");
  script_xref(name:"IAVA", value:"2026-A-0451");

  script_name(english:"EulerOS Virtualization 2.11.0 : expat (EulerOS-SA-2026-3500)");

  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 expat package installed, the EulerOS Virtualization installation on the remote host is
affected by the following vulnerabilities :

    An issue was discovered in libexpat before 2.6.3. xmlparse.c does not reject a negative length for
    XML_ParseBuffer.(CVE-2024-45490)

    An issue was discovered in libexpat before 2.6.3. dtdCopy in xmlparse.c can have an integer overflow for
    nDefaultAtts on 32-bit platforms (where UINT_MAX equals SIZE_MAX).(CVE-2024-45491)

    An issue was discovered in libexpat before 2.6.3. nextScaffoldPart in xmlparse.c can have an integer
    overflow for m_groupSize on 32-bit platforms (where UINT_MAX equals SIZE_MAX).(CVE-2024-45492)

    An issue was discovered in libexpat before 2.6.4. There is a crash within the XML_ResumeParser function
    because XML_StopParser can stop/suspend an unstarted parser.(CVE-2024-50602)

    A stack overflow vulnerability exists in the libexpat library due to the way it handles recursive entity
    expansion in XML documents. When parsing an XML document with deeply nested entity references, libexpat
    can be forced to recurse indefinitely, exhausting the stack space and causing a crash. This issue could
    lead to denial of service (DoS) or, in some cases, exploitable memory corruption, depending on the
    environment and library usage.(CVE-2024-8176)

    libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small
    document that is submitted for parsing.(CVE-2025-59375)

    In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user
    data.(CVE-2026-24515)

    In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize
    because there is no integer overflow check for tag buffer reallocation.(CVE-2026-25210)

    libexpat before 2.7.5 allows an infinite loop while parsing DTD content.(CVE-2026-32777)

    libexpat before 2.7.5 allows a NULL pointer dereference with empty external parameter entity
    content.(CVE-2026-32776)

    libexpat before 2.7.5 allows a NULL pointer dereference in the function setContext on retry after an
    earlier ouf-of-memory condition.(CVE-2026-32778)

    libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML
    document.(CVE-2026-41080)

    In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial
    of service via moderately sized crafted XML input.(CVE-2026-45186)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization expat 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-2026-3500
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?279244cf");
  script_set_attribute(attribute:"solution", value:
"Update the affected expat packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/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:"cvss_score_source", value:"CVE-2024-45492");

  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:"2023/12/12");
  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:expat");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.11.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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 = [
  "expat-2.4.1-5.h15.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_HOLE,
    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, "expat");
}