Python Email Header Injection Vulnerability (Aug 2024) - Linux

# SPDX-FileCopyrightText: 2024 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("1.3.6.1.4.1.25623.1.0.114731");
  script_version("2024-08-14T05:05:52+0000");
  script_tag(name:"last_modification", value:"2024-08-14 05:05:52 +0000 (Wed, 14 Aug 2024)");
  script_tag(name:"creation_date", value:"2024-08-02 13:10:48 +0000 (Fri, 02 Aug 2024)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:P/A:N");

  script_cve_id("CVE-2024-6923");

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

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

  script_name("Python Email Header Injection Vulnerability (Aug 2024) - Linux");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2024 Greenbone AG");
  script_family("General");
  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 an email header injection vulnerability in
  the email module.");

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

  script_tag(name:"insight", value:"The email module didn't properly quote newlines for email
  headers when serializing an email message allowing for header injection when an email is
  serialized.");

  # TODO: As of 2024-08-12 only 3.12.5 got released with a fix, the relevant changelog entry for the
  # "Library" part includes a reference to the fix:
  # > gh-121650: email headers with embedded newlines are now quoted on output. The generator will now refuse to serialize (write) headers that are unsafely folded or delimited; see verify_generated_headers. (Contributed by Bas Bloemsaat and Petr Viktorin in gh-121650.)
  # which can / should be checked against newer releases of the 3.11.x or earlier branches for any
  # possible fixes
  script_tag(name:"affected", value:"Python versions prior to 3.12.5.");

  script_tag(name:"solution", value:"Update to version 3.12.5 or later.");

  script_xref(name:"URL", value:"https://mail.python.org/archives/list/[email protected]/thread/QH3BUOE2DYQBWP7NAQ7UNHPPOELKISRW/");
  script_xref(name:"URL", value:"https://github.com/python/cpython/issues/121650");
  script_xref(name:"URL", value:"https://github.com/python/cpython/pull/122233");
  script_xref(name:"URL", value:"https://docs.python.org/release/3.12.5/whatsnew/changelog.html#library");
  script_xref(name:"URL", value:"https://osv.dev/vulnerability/PSF-2024-8");

  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: "3.12.5")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.12.5", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);