Debian dla-4197 : python3-flask-cors - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-4197. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(237621);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/05/31");

  script_cve_id(
    "CVE-2024-1681",
    "CVE-2024-6839",
    "CVE-2024-6844",
    "CVE-2024-6866"
  );

  script_name(english:"Debian dla-4197 : python3-flask-cors - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the
dla-4197 advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4197-1                [email protected]
    https://www.debian.org/lts/security/                       Daniel Leidert
    May 31, 2025                                  https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : python-flask-cors
    Version        : 3.0.9-2+deb11u1
    CVE ID         : CVE-2024-1681 CVE-2024-6839 CVE-2024-6844 CVE-2024-6866
    Debian Bug     : 1069764 1100988

    Multiple security issues were discovered in Flask-CORS, a Flask
    extension for handling Cross Origin Resource Sharing (CORS).

    CVE-2024-1681

       Due to a log injection vulnerability when the log level is set to
       debug, an attacker can inject fake log entries into the log file by
       sending a specially crafted GET request containing a CRLF sequence
       in the request path.

    CVE-2024-6839

       An improper regex path matching vulnerability due to prioritizing
       longer regex patterns over more specific ones when matching paths,
       can lead to less restrictive CORS policies being applied to
       sensitive endpoints.

    CVE-2024-6844

       An inconsistent CORS matching due to the handling of the '+'
       character in URL paths leads to incorrect path normalization,
       causing potential mismatches in CORS configuration.

    CVE-2024-6866

       The request path matching is case-insensitive. This results in a
       mismatch because paths in URLs are case-sensitive. This
       misconfiguration can lead to significant security vulnerabilities,
       allowing unauthorized origins to access paths meant to be
       restricted.

    For Debian 11 bullseye, these problems have been fixed in version
    3.0.9-2+deb11u1.

    We recommend that you upgrade your python-flask-cors packages.

    For the detailed security status of python-flask-cors please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/python-flask-cors

    Further information about Debian LTS security advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://wiki.debian.org/LTS
    Attachment:
    signature.asc
    Description: This is a digitally signed message part

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://security-tracker.debian.org/tracker/source-package/python-flask-cors
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8a369db6");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-1681");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-6839");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-6844");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-6866");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/python-flask-cors");
  script_set_attribute(attribute:"solution", value:
"Upgrade the python3-flask-cors packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-6866");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/04/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/05/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/05/31");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-flask-cors");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(11)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 11.0', 'Debian ' + debian_release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '11.0', 'prefix': 'python3-flask-cors', 'reference': '3.0.9-2+deb11u1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var _release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (_release && prefix && reference) {
    if (deb_check(release:_release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'python3-flask-cors');
}