Ubuntu 18.04 ESM / 20.04 ESM : Symfony vulnerabilities (USN-5290-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5290-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
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  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/16");

  script_cve_id("CVE-2021-21424", "CVE-2021-41270");
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  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 18.04 ESM / 20.04 ESM host has packages installed that are affected by multiple vulnerabilities as
referenced in the USN-5290-1 advisory.

  - Symfony is a PHP framework for web and console applications and a set of reusable PHP components. The
    ability to enumerate users was possible without relevant permissions due to different handling depending
    on whether the user existed or not when attempting to use the switch users functionality. We now ensure
    that 403s are returned whether the user exists or not if a user cannot switch to a user or if the user
    does not exist. The patch for this issue is available for branch 3.4. (CVE-2021-21424)

  - Symfony/Serializer handles serializing and deserializing data structures for Symfony, a PHP framework for
    web and console applications and a set of reusable PHP components. Symfony versions 4.1.0 before 4.4.35
    and versions 5.0.0 before 5.3.12 are vulnerable to CSV injection, also known as formula injection. In
    Symfony 4.1, maintainers added the opt-in `csv_escape_formulas` option in the `CsvEncoder`, to prefix all
    cells starting with `=`, `+`, `-` or `@` with a tab `\t`. Since then, OWASP added 2 chars in that list:
    Tab (0x09) and Carriage return (0x0D). This makes the previous prefix char (Tab `\t`) part of the
    vulnerable characters, and OWASP suggests using the single quote `'` for prefixing the value. Starting
    with versions 4.4.34 and 5.3.12, Symfony now follows the OWASP recommendations and uses the single quote
    `'` to prefix formulas and add the prefix to cells starting by `\t`, `\r` as well as `=`, `+`, `-` and
    `@`. (CVE-2021-41270)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-5290-1");
  script_set_attribute(attribute:"solution", value:
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  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
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  script_set_attribute(attribute:"vuln_publication_date", value:"2021/05/13");
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include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 20.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '18.04', 'pkgname': 'php-symfony', 'pkgver': '3.4.6+dfsg-1ubuntu0.1+esm2'},
    {'osver': '18.04', 'pkgname': 'php-symfony-asset', 'pkgver': '3.4.6+dfsg-1ubuntu0.1+esm2'},
    {'osver': '18.04', 'pkgname': 'php-symfony-browser-kit', 'pkgver': '3.4.6+dfsg-1ubuntu0.1+esm2'},
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    {'osver': '18.04', 'pkgname': 'php-symfony-css-selector', 'pkgver': '3.4.6+dfsg-1ubuntu0.1+esm2'},
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    {'osver': '20.04', 'pkgname': 'php-symfony-asset', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-browser-kit', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-cache', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-config', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
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    {'osver': '20.04', 'pkgname': 'php-symfony-expression-language', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-filesystem', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-finder', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-form', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
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    {'osver': '20.04', 'pkgname': 'php-symfony-http-client', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
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    {'osver': '20.04', 'pkgname': 'php-symfony-lock', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-mailchimp-mailer', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-mailer', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-mailgun-mailer', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-messenger', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-mime', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-monolog-bridge', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-options-resolver', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-phpunit-bridge', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-postmark-mailer', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-process', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-property-access', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-property-info', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-proxy-manager-bridge', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-routing', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-security', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-security-bundle', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-security-core', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-security-csrf', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-security-guard', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-security-http', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-sendgrid-mailer', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-serializer', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-stopwatch', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-templating', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-translation', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-twig-bridge', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-twig-bundle', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-validator', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-var-dumper', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-var-exporter', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-web-link', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-web-profiler-bundle', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-web-server-bundle', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-workflow', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'},
    {'osver': '20.04', 'pkgname': 'php-symfony-yaml', 'pkgver': '4.3.8+dfsg-1ubuntu1+esm1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'php-symfony / php-symfony-amazon-mailer / php-symfony-asset / etc');
}