Debian DSA-5082-1 : php7.4 - security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-5082. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(158202);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/07");

  script_cve_id("CVE-2021-21707", "CVE-2021-21708");
  script_xref(name:"IAVA", value:"2021-A-0566-S");

  script_name(english:"Debian DSA-5082-1 : php7.4 - 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 packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-5082 advisory.

  - In PHP versions 7.3.x below 7.3.33, 7.4.x below 7.4.26 and 8.0.x below 8.0.13, certain XML parsing
    functions, like simplexml_load_file(), URL-decode the filename passed to them. If that filename contains
    URL-encoded NUL character, this may cause the function to interpret this as the end of the filename, thus
    interpreting the filename differently from what the user intended, which may lead it to reading a
    different file than intended. (CVE-2021-21707)

  - In PHP versions 7.4.x below 7.4.28, 8.0.x below 8.0.16, and 8.1.x below 8.1.3, when using filter functions
    with FILTER_VALIDATE_FLOAT filter and min/max limits, if the filter fails, there is a possibility to
    trigger use of allocated memory after free, which can result it crashes, and potentially in overwrite of
    other memory chunks and RCE. This issue affects: code that uses FILTER_VALIDATE_FLOAT with min/max limits.
    (CVE-2021-21708)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/php7.4");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2022/dsa-5082");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-21707");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-21708");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/php7.4");
  script_set_attribute(attribute:"solution", value:
"Upgrade the php7.4 packages.

For the stable distribution (bullseye), these problems have been fixed in version 7.4.28-1+deb11u1.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-21708");

  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:"2021/11/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/02/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libapache2-mod-php7.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libphp7.4-embed");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-bcmath");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-bz2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-cgi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-cli");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-curl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-dba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-enchant");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-fpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-gd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-gmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-imap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-interbase");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-intl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-json");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-mbstring");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-odbc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-opcache");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-phpdbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-pspell");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-readline");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-snmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-soap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-sqlite3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-sybase");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-tidy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-xml");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-xmlrpc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-xsl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php7.4-zip");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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('audit.inc');
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:"^(11)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 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': '11.0', 'prefix': 'libapache2-mod-php7.4', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'libphp7.4-embed', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-bcmath', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-bz2', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-cgi', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-cli', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-common', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-curl', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-dba', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-dev', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-enchant', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-fpm', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-gd', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-gmp', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-imap', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-interbase', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-intl', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-json', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-ldap', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-mbstring', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-mysql', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-odbc', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-opcache', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-pgsql', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-phpdbg', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-pspell', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-readline', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-snmp', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-soap', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-sqlite3', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-sybase', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-tidy', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-xml', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-xmlrpc', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-xsl', 'reference': '7.4.28-1+deb11u1'},
    {'release': '11.0', 'prefix': 'php7.4-zip', 'reference': '7.4.28-1+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, 'libapache2-mod-php7.4 / libphp7.4-embed / php7.4 / php7.4-bcmath / etc');
}