Debian DSA-5151-1 : smarty3 - security update

#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-5151. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(161686);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/26");

  script_cve_id(
    "CVE-2021-21408",
    "CVE-2021-26119",
    "CVE-2021-26120",
    "CVE-2021-29454",
    "CVE-2022-29221"
  );

  script_name(english:"Debian DSA-5151-1 : smarty3 - 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 10 / 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the
dsa-5151 advisory.

  - Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from
    application logic. Prior to versions 3.1.43 and 4.0.3, template authors could run restricted static php
    methods. Users should upgrade to version 3.1.43 or 4.0.3 to receive a patch. (CVE-2021-21408)

  - Smarty before 3.1.39 allows a Sandbox Escape because $smarty.template_object can be accessed in sandbox
    mode. (CVE-2021-26119)

  - Smarty before 3.1.39 allows code injection via an unexpected function name after a {function name=
    substring. (CVE-2021-26120)

  - Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from
    application logic. Prior to versions 3.1.42 and 4.0.2, template authors could run arbitrary PHP code by
    crafting a malicious math string. If a math string was passed through as user provided data to the math
    function, external users could run arbitrary PHP code by crafting a malicious math string. Users should
    upgrade to version 3.1.42 or 4.0.2 to receive a patch. (CVE-2021-29454)

  - Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from
    application logic. Prior to versions 3.1.45 and 4.1.1, template authors could inject php code by choosing
    a malicious {block} name or {include} file name. Sites that cannot fully trust template authors should
    upgrade to versions 3.1.45 or 4.1.1 to receive a patch for this issue. There are currently no known
    workarounds. (CVE-2022-29221)

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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1010375");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/smarty3");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2022/dsa-5151");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-21408");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-26119");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-26120");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-29454");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-29221");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/smarty3");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/smarty3");
  script_set_attribute(attribute:"solution", value:
"Upgrade the smarty3 packages.

For the stable distribution (bullseye), these problems have been fixed in version 3.1.39-2+deb11u1.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-26120");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/02/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/05/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/05/31");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:smarty3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 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 release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(10)\.[0-9]+|^(11)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 10.0 / 11.0', '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': '10.0', 'prefix': 'smarty3', 'reference': '3.1.33+20180830.1.3a78a21f+selfpack1-1+deb10u1'},
    {'release': '11.0', 'prefix': 'smarty3', 'reference': '3.1.39-2+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_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, 'smarty3');
}