Linux Distros Unpatched Vulnerability : CVE-2025-4211

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

include('compat.inc');

if (description)
{
  script_id(243605);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/04");

  script_cve_id("CVE-2025-4211");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2025-4211");

  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.

  - Improper Link Resolution Before File Access ('Link Following') vulnerability in QFileSystemEngine in the
    Qt corelib module on Windows which potentially allows Symlink Attacks and the use of Malicious Files.
    Issue originates from CVE-2024-38081. The vulnerability arises from the use of the GetTempPath API, which
    can be exploited by attackers to manipulate temporary file paths, potentially leading to unauthorized
    access and privilege escalation. The affected public API in the Qt Framework is QDir::tempPath() and
    anything that uses it, such as QStandardPaths with TempLocation, QTemporaryDir, and QTemporaryFile.This
    issue affects all version of Qt up to and including 5.15.18, from 6.0.0 through 6.5.8, from 6.6.0 through
    6.8.1. It is fixed in Qt 5.15.19, Qt 6.5.9, Qt 6.8.2, 6.9.0 (CVE-2025-4211)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2025-4211");
  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:L/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/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:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H");
  script_set_attribute(attribute:"cvss4_supplemental", value:"CVSS:4.0/S:P");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-4211");

  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:"2025/05/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/08/05");

  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:25.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qt6-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qtbase-opensource-src");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qtbase-opensource-src-gles");
  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) 2025-2026 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/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-25.04", "Host/OS/Ubuntu Linux-25.10", "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 = {
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "libqt5concurrent5"},
          {"reference": "libqt5core5a"},
          {"reference": "libqt5dbus5"},
          {"reference": "libqt5gui5"},
          {"reference": "libqt5libqgtk2"},
          {"reference": "libqt5network5"},
          {"reference": "libqt5opengl5"},
          {"reference": "libqt5opengl5-dev"},
          {"reference": "libqt5printsupport5"},
          {"reference": "libqt5sql5"},
          {"reference": "libqt5sql5-mysql"},
          {"reference": "libqt5sql5-odbc"},
          {"reference": "libqt5sql5-psql"},
          {"reference": "libqt5sql5-sqlite"},
          {"reference": "libqt5sql5-tds"},
          {"reference": "libqt5test5"},
          {"reference": "libqt5widgets5"},
          {"reference": "libqt5xml5"},
          {"reference": "qt5-default"},
          {"reference": "qt5-qmake"},
          {"reference": "qt5-qmake-arm-linux-gnueabihf"},
          {"reference": "qtbase-opensource-src-gles"},
          {"reference": "qtbase5-dbg"},
          {"reference": "qtbase5-dev"},
          {"reference": "qtbase5-dev-tools"},
          {"reference": "qtbase5-dev-tools-dbg"},
          {"reference": "qtbase5-doc-html"},
          {"reference": "qtbase5-examples"},
          {"reference": "qtbase5-examples-dbg"},
          {"reference": "qtbase5-private-dev"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "libqt5concurrent5"},
          {"reference": "libqt5core5a"},
          {"reference": "libqt5dbus5"},
          {"reference": "libqt5gui5"},
          {"reference": "libqt5network5"},
          {"reference": "libqt5opengl5"},
          {"reference": "libqt5opengl5-dev"},
          {"reference": "libqt5printsupport5"},
          {"reference": "libqt5sql5"},
          {"reference": "libqt5sql5-ibase"},
          {"reference": "libqt5sql5-mysql"},
          {"reference": "libqt5sql5-odbc"},
          {"reference": "libqt5sql5-psql"},
          {"reference": "libqt5sql5-sqlite"},
          {"reference": "libqt5sql5-tds"},
          {"reference": "libqt5test5"},
          {"reference": "libqt5widgets5"},
          {"reference": "libqt5xml5"},
          {"reference": "qt5-default"},
          {"reference": "qt5-gtk-platformtheme"},
          {"reference": "qt5-qmake"},
          {"reference": "qt5-qmake-bin"},
          {"reference": "qtbase5-dev"},
          {"reference": "qtbase5-dev-tools"},
          {"reference": "qtbase5-doc"},
          {"reference": "qtbase5-doc-html"},
          {"reference": "qtbase5-examples"},
          {"reference": "qtbase5-private-dev"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "qtbase-opensource-src"},
          {"reference": "qtbase-opensource-src-gles"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "qt6-base"},
          {"reference": "qtbase-opensource-src"},
          {"reference": "qtbase-opensource-src-gles"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "qt6-base"},
          {"reference": "qtbase-opensource-src"},
          {"reference": "qtbase-opensource-src-gles"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.04",
        "pkgs": [
          {"reference": "qt6-base"},
          {"reference": "qtbase-opensource-src"},
          {"reference": "qtbase-opensource-src-gles"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "qt6-base"},
          {"reference": "qtbase-opensource-src"},
          {"reference": "qtbase-opensource-src-gles"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "qt6-base"},
          {"reference": "qtbase-opensource-src"},
          {"reference": "qtbase-opensource-src-gles"}
        ]
      }
    ]
  }
};

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 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');
}