Python 2.7.x < 2.7.15 Heap-Based Buffer Overflow Vulnerability Python Issue (bpo-31530) - Linux

# SPDX-FileCopyrightText: 2021 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("1.3.6.1.4.1.25623.1.0.118239");
  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:"2021-10-04 12:04:36 +0200 (Mon, 04 Oct 2021)");
  script_tag(name:"cvss_base", value:"3.3");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:P/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:L");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-08-24 17:37:00 +0000 (Mon, 24 Aug 2020)");

  script_cve_id("CVE-2018-1000030");

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

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

  script_name("Python 2.7.x < 2.7.15 Heap-Based Buffer Overflow Vulnerability Python Issue (bpo-31530) - Linux");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone AG");
  script_family("Buffer overflow");
  script_dependencies("gb_python_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("python/detected", "Host/runs_unixoide");

  script_tag(name:"summary", value:"Python is prone to a heap-based buffer overflow 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 due to an improper notification
  mechanism on buffer reallocation and corruption in a file's internal readahead
  buffer which, while processing large amounts of data with multiple threads, could
  create a condition where a buffer that gets allocated with one thread is
  reallocated due to a large size of input.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker
  to cause a heap-based buffer overflow.");

  script_tag(name:"affected", value:"Python 2.7.x before version 2.7.15.");

  script_tag(name:"solution", value:"Update to version 2.7.15 or later.");

  script_xref(name:"URL", value:"https://python-security.readthedocs.io/vuln/python-2.7-readahead-not-thread-safe.html");
  script_xref(name:"URL", value:"https://bugs.python.org/issue31530");
  script_xref(name:"Advisory-ID", value:"bpo-31530");

  exit(0);
}

include("version_func.inc");
include("host_details.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_in_range(version: version, test_version: "2.7.0", test_version2: "2.7.14")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2.7.15", install_path: location);
  security_message(data: report, port: port);
  exit(0);
}

exit(99);