Linux Distros Unpatched Vulnerability : CVE-2026-104140

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

include('compat.inc');

if (description)
{
  script_id(369129);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/22");

  script_cve_id("CVE-2026-104140");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-104140");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - QGIS is a free, open source, cross-platform geographic information system. Prior to 3.44.12 and 4.0.0
    through 4.2.3, QGIS Server renders feature data in WFS3 (OGC API Features) HTML responses without HTML
    escaping. Attacker-controlled feature.properties values from a published writable vector layer reach
    resources/server/api/ogc/templates/wfs3/getFeatures.html through QgsServerOgcApiHandler::htmlDump and the
    if_nullptr_null_str callback. A user who opens an items HTML page can execute stored markup or script in
    the QGIS Server origin, which can expose the viewer's session data or issue authenticated requests with
    the viewer's privileges. This issue is fixed in version 3.44.12. (CVE-2026-104140)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-104140");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-104140");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-104140");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qgis");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qgis");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  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", "set_linux_os_id.nasl");
  script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched", "Host/OS/identifier");
  script_require_ports("Host/OS/Debian Linux-12", "Host/OS/Debian Linux-13", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04", "Host/OS/Ubuntu Linux-22.04", "Host/OS/Ubuntu Linux-24.04", "Host/OS/Ubuntu Linux-26.04");

  exit(0);
}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/Debian/dpkg-l"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Debian Linux-12": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "12",
        "pkgs": [
          {"reference": "libqgis-3d3.22.16"},
          {"reference": "libqgis-analysis3.22.16"},
          {"reference": "libqgis-app3.22.16"},
          {"reference": "libqgis-core3.22.16"},
          {"reference": "libqgis-customwidgets"},
          {"reference": "libqgis-dev"},
          {"reference": "libqgis-gui3.22.16"},
          {"reference": "libqgis-native3.22.16"},
          {"reference": "libqgis-server3.22.16"},
          {"reference": "libqgisgrass8-3.22.16"},
          {"reference": "libqgispython3.22.16"},
          {"reference": "python3-qgis"},
          {"reference": "python3-qgis-common"},
          {"reference": "qgis"},
          {"reference": "qgis-api-doc"},
          {"reference": "qgis-common"},
          {"reference": "qgis-plugin-grass"},
          {"reference": "qgis-plugin-grass-common"},
          {"reference": "qgis-provider-grass"},
          {"reference": "qgis-providers"},
          {"reference": "qgis-providers-common"},
          {"reference": "qgis-server"},
          {"reference": "qgis-server-bin"},
          {"reference": "qgis-server-common"},
          {"reference": "qgis-server-dummy"},
          {"reference": "qgis-server-landingpage"},
          {"reference": "qgis-server-wcs"},
          {"reference": "qgis-server-wfs"},
          {"reference": "qgis-server-wfs3"},
          {"reference": "qgis-server-wms"},
          {"reference": "qgis-server-wmts"},
          {"reference": "qgis-sip"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "libqgis-3d3.40.6"},
          {"reference": "libqgis-analysis3.40.6"},
          {"reference": "libqgis-app3.40.6"},
          {"reference": "libqgis-core3.40.6"},
          {"reference": "libqgis-customwidgets"},
          {"reference": "libqgis-dev"},
          {"reference": "libqgis-gui3.40.6"},
          {"reference": "libqgis-native3.40.6"},
          {"reference": "libqgis-server3.40.6"},
          {"reference": "libqgisgrass8-3.40.6"},
          {"reference": "libqgispython3.40.6"},
          {"reference": "python3-qgis"},
          {"reference": "python3-qgis-common"},
          {"reference": "qgis"},
          {"reference": "qgis-api-doc"},
          {"reference": "qgis-common"},
          {"reference": "qgis-plugin-grass"},
          {"reference": "qgis-plugin-grass-common"},
          {"reference": "qgis-provider-grass"},
          {"reference": "qgis-providers"},
          {"reference": "qgis-providers-common"},
          {"reference": "qgis-server"},
          {"reference": "qgis-server-bin"},
          {"reference": "qgis-server-common"},
          {"reference": "qgis-server-landingpage"},
          {"reference": "qgis-server-wcs"},
          {"reference": "qgis-server-wfs"},
          {"reference": "qgis-server-wfs3"},
          {"reference": "qgis-server-wms"},
          {"reference": "qgis-server-wmts"},
          {"reference": "qgis-sip"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "qgis"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "qgis"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "qgis"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "qgis"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "qgis"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "qgis"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');

var third_party_support = get_kb_item('Host/OS/extended-third-party');
if (!empty_or_null(third_party_support)) {
    var third_party_vendors = distro_constraints_values['third_party'];
    if (!empty_or_null(third_party_vendors)) {
        var vendor;
        foreach vendor (third_party_vendors) {
            if (vendor == third_party_support) exit(0, 'A third party management patch is available for this vulnerability from ' + vendor + '.\n');
        }
    }
}

var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}