Debian dla-4331 : webext-https-everywhere - 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-4331. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(270460);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/15");

  script_name(english:"Debian dla-4331 : webext-https-everywhere - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 11 host has a package installed that is affected by a vulnerability as referenced in the dla-4331
advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4331-1                [email protected]
    https://www.debian.org/lts/security/                      Markus Koschany
    October 14, 2025                              https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : https-everywhere
    Version        : 2025.10.14-0+deb11u1
    Debian Bug     : 1118030 1118045

    The Firefox extension HTTPS Everywhere used to enforce encryption over HTTPS in
    major web browsers, a feature which has become obsolete because a HTTPS-only
    mode is built-in nowadays. Consequently HTTPS Everywhere has been removed from
    Debian in 2023.

    The extension requires up-to-date https rules which are obtained from the
    domain https-rulesets.org. This domain is no longer controlled by the original
    upstream developers and registered by a third party now. Requests are
    redirected to a known malware site. This poses a severe risk for users of HTTPS
    Everywhere.

    As a first step to remedy this problem, version 2025.10.14-0+deb11u1 will
    completely remove all files associated with HTTPS Everywhere and only install a
    README file to raise the awareness for this security problem. The Debian
    packages parl-desktop and progress-linux-desktop will no longer depend on
    webext-https-everywhere.

    The source package https-everywhere and the binary package webext-https-
    everywhere will be removed from Debian in a subsequent step.

    We recommend to avoid using HTTPS Everywhere and to use web browsers, e.g.
    Firefox, which support HTTPS only instead. For more information, please refer
    to Debian bugs #1118030 and #1118045.

    For Debian 11 bullseye, this problem has been fixed in version
    2025.10.14-0+deb11u1.

    We recommend that you upgrade your https-everywhere packages.

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

    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 this issue but has instead relied only on the application's self-reported version
number.");
  # https://security-tracker.debian.org/tracker/source-package/https-everywhere
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?279789a4");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/https-everywhere");
  script_set_attribute(attribute:"solution", value:
"Upgrade the webext-https-everywhere packages.");
  script_set_attribute(attribute:"risk_factor", value:"High");

  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:"2025/10/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/10/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:webext-https-everywhere");
  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': 'webext-https-everywhere', 'reference': '2025.10.14-0+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_HOLE,
    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, 'webext-https-everywhere');
}