Python 2.7.x < 2.7.16, 3.4.x < 3.4.10, 3.5.x < 3.5.7, 3.6.x < 3.6.7, 3.7.0 Python Issue (bpo-34623) - Mac OS X

# SPDX-FileCopyrightText: 2018 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/a:python:python";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.814307");
  script_version("2023-07-05T05:06:18+0000");
  script_tag(name:"last_modification", value:"2023-07-05 05:06:18 +0000 (Wed, 05 Jul 2023)");
  script_tag(name:"creation_date", value:"2018-10-03 17:01:58 +0530 (Wed, 03 Oct 2018)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-07-29 12:15:00 +0000 (Wed, 29 Jul 2020)");

  script_cve_id("CVE-2018-14647");

  script_tag(name:"qod_type", value:"executable_version");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Python 2.7.x < 2.7.16, 3.4.x < 3.4.10, 3.5.x < 3.5.7, 3.6.x < 3.6.7, 3.7.0 Python Issue (bpo-34623) - Mac OS X");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gb_python_consolidation.nasl");
  script_mandatory_keys("python/mac-os-x/detected");

  script_tag(name:"summary", value:"Python is prone to a denial of service vulnerability.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"The flaw exists because Python's elementtree C accelerator
  fails to initialise Expat's hash salt during initialization");

  script_tag(name:"impact", value:"Successful exploitation allows denial of service attacks
  against Expat by constructing an XML document that would cause pathological hash collisions
  in Expat's internal data structures, consuming large amounts CPU and RAM.");

  script_tag(name:"affected", value:"Python versions 2.7.0 through 2.7.15, 3.4.0 through 3.4.9,
  3.5.0 through 3.5.6, 3.6.0 through 3.6.6 and 3.7.0.");

  script_tag(name:"solution", value:"Update to version 2.7.16, 3.4.10, 3.5.7, 3.6.7, 3.7.1 or later.");

  script_xref(name:"URL", value:"https://python-security.readthedocs.io/vuln/elementree_salt.html");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/105396");
  script_xref(name:"URL", value:"https://bugs.python.org/issue34623");
  script_xref(name:"URL", value:"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14647");
  script_xref(name:"Advisory-ID", value:"bpo-34623");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if (isnull(port = get_app_port(cpe: CPE)))
  exit(0);

if (!infos = get_app_version_and_location(cpe: CPE, port: port, exit_no_version: TRUE, version_regex:"^[0-9]+\.[0-9]+\.[0-9]+"))
  exit(0);

version = infos["version"];
location = infos["location"];

if (version_is_less(version: version, test_version: "2.7.16")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2.7.16", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "3.4", test_version2: "3.4.9")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.4.10", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "3.5", test_version2: "3.5.6")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.5.7", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "3.6", test_version2: "3.6.6")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.6.7", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_is_equal(version: version, test_version: "3.7.0")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.7.1", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);