Linux Distros Unpatched Vulnerability : CVE-2026-96748

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

include('compat.inc');

if (description)
{
  script_id(350277);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/25");

  script_cve_id("CVE-2026-96748");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-96748");

  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.

  - PyMongo's connection string parsing decodes percent-encoded characters in the host portion before the host
    list is separated on its delimiters. When an application places a hostname value supplied by an
    unauthenticated party into a connection string, that party may cause additional servers of their choosing
    to be added to the application's database client. The application may then send its authentication
    exchange and database operations to one of those servers, which can observe limited information and return
    altered results. (CVE-2026-96748)

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-2026-96748");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-96748");
  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:N/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:H/PR:N/UI:N/S:U/C:L/I:H/A:N");
  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:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-96748");

  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:"2026/09/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  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:"cpe:/o:debian:debian_linux:14.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:pymongo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pymongo");
  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/Debian Linux-14", "Host/OS/Ubuntu Linux-14.04", "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": "python-pymongo-doc"},
          {"reference": "python3-bson"},
          {"reference": "python3-bson-ext"},
          {"reference": "python3-gridfs"},
          {"reference": "python3-pymongo"},
          {"reference": "python3-pymongo-ext"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "python-pymongo-doc"},
          {"reference": "python3-bson"},
          {"reference": "python3-bson-ext"},
          {"reference": "python3-gridfs"},
          {"reference": "python3-pymongo"},
          {"reference": "python3-pymongo-ext"}
        ]
      }
    ]
  },
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "python-pymongo-doc"},
          {"reference": "python3-bson"},
          {"reference": "python3-bson-ext"},
          {"reference": "python3-gridfs"},
          {"reference": "python3-pymongo"},
          {"reference": "python3-pymongo-ext"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "python-pymongo-doc"},
          {"reference": "python3-bson"},
          {"reference": "python3-bson-ext"},
          {"reference": "python3-gridfs"},
          {"reference": "python3-pymongo"},
          {"reference": "python3-pymongo-ext"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "python-pymongo-doc"},
          {"reference": "python3-bson"},
          {"reference": "python3-bson-ext"},
          {"reference": "python3-gridfs"},
          {"reference": "python3-pymongo"},
          {"reference": "python3-pymongo-ext"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "python-pymongo-doc"},
          {"reference": "python3-bson"},
          {"reference": "python3-bson-ext"},
          {"reference": "python3-gridfs"},
          {"reference": "python3-pymongo"},
          {"reference": "python3-pymongo-ext"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "python-pymongo-doc"},
          {"reference": "python3-bson"},
          {"reference": "python3-bson-ext"},
          {"reference": "python3-gridfs"},
          {"reference": "python3-pymongo"},
          {"reference": "python3-pymongo-ext"}
        ]
      }
    ]
  },
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "python-bson"},
          {"reference": "python-bson-ext"},
          {"reference": "python-gridfs"},
          {"reference": "python-pymongo"},
          {"reference": "python-pymongo-doc"},
          {"reference": "python-pymongo-ext"},
          {"reference": "python3-bson"},
          {"reference": "python3-bson-ext"},
          {"reference": "python3-gridfs"},
          {"reference": "python3-pymongo"},
          {"reference": "python3-pymongo-ext"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "python-bson"},
          {"reference": "python-bson-ext"},
          {"reference": "python-gridfs"},
          {"reference": "python-pymongo"},
          {"reference": "python-pymongo-doc"},
          {"reference": "python-pymongo-ext"},
          {"reference": "python3-bson"},
          {"reference": "python3-bson-ext"},
          {"reference": "python3-gridfs"},
          {"reference": "python3-pymongo"},
          {"reference": "python3-pymongo-ext"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "python-bson"},
          {"reference": "python-bson-ext"},
          {"reference": "python-gridfs"},
          {"reference": "python-pymongo"},
          {"reference": "python-pymongo-doc"},
          {"reference": "python-pymongo-ext"},
          {"reference": "python3-bson"},
          {"reference": "python3-bson-ext"},
          {"reference": "python3-gridfs"},
          {"reference": "python3-pymongo"},
          {"reference": "python3-pymongo-ext"}
        ]
      }
    ]
  }
};

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');
}