NewStart CGSL MAIN 7.02 : libxslt Multiple Vulnerabilities (NS-SA-2026-0092)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2026-0092. The text
# itself is copyright (C) ZTE, Inc.
##

include('compat.inc');

if (description)
{
  script_id(343599);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/08");

  script_cve_id(
    "CVE-2025-7424",
    "CVE-2025-10911",
    "CVE-2025-11731",
    "CVE-2025-24855"
  );
  script_xref(name:"IAVA", value:"2025-A-0187");

  script_name(english:"NewStart CGSL MAIN 7.02 : libxslt Multiple Vulnerabilities (NS-SA-2026-0092)");

  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 libxslt packages installed that are affected by multiple
vulnerabilities:

  - numbers.c in libxslt before 1.1.43 has a use-after-free because, in nested XPath evaluations, an XPath
    context node can be modified but never restored. This is related to xsltNumberFormatGetValue,
    xsltEvalXPathPredicate, xsltEvalXPathStringNs, and xsltComputeSortResultInternal. (CVE-2025-24855)

  - A use-after-free vulnerability was found in libxslt while parsing xsl nodes that may lead to the
    dereference of expired pointers and application crash. (CVE-2025-10911)

  - A flaw was found in the exsltFuncResultComp() function of libxslt, which handles EXSLT <func:result>
    elements during stylesheet parsing. Due to improper type handling, the function may treat an XML document
    node as a regular XML element node, resulting in a type confusion. This can cause unexpected memory reads
    and potential crashes. While difficult to exploit, the flaw could lead to application instability or
    denial of service. (CVE-2025-11731)

  - A flaw was found in the libxslt library. The same memory field, psvi, is used for both stylesheet and
    input data, which can lead to type confusion during XML transformations. This vulnerability allows an
    attacker to crash the application or corrupt memory. In some cases, it may lead to denial of service or
    unexpected behavior. (CVE-2025-7424)

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-2026-0092");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2025-10911");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2025-11731");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2025-24855");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2025-7424");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL libxslt 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:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-24855");

  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:"2025/03/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:libxslt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:libxslt-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:libxslt-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:python3-libxslt");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:zte:cgsl_main:7");
  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:"NewStart CGSL 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_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': [
    'libxslt-1.1.43-5.zncgsl7.1',
    'libxslt-devel-1.1.43-5.zncgsl7.1',
    'libxslt-doc-1.1.43-5.zncgsl7.1',
    'python3-libxslt-1.1.43-5.zncgsl7.1'
  ]
};
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, 'libxslt');
}