Ubuntu 20.04 LTS : PHP vulnerabilities (USN-4330-2)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4330-2. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(136398);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/29");

  script_cve_id("CVE-2020-7064", "CVE-2020-7065", "CVE-2020-7066");
  script_xref(name:"USN", value:"4330-2");
  script_xref(name:"CEA-ID", value:"CEA-2021-0004");

  script_name(english:"Ubuntu 20.04 LTS : PHP vulnerabilities (USN-4330-2)");

  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 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in
the USN-4330-2 advisory.

    USN-4330-1 fixed vulnerabilities in PHP. This update provides the corresponding update for Ubuntu 20.04
    LTS.

    Original advisory details:

    It was discovered that PHP incorrectly handled certain EXIF files.

    An attacker could possibly use this issue to access sensitive information

    or cause a crash. (CVE-2020-7064)

    It was discovered that PHP incorrectly handled certain UTF strings.

    An attacker could possibly use this issue to cause a crash or execute

    arbitrary code. (CVE-2020-7065)

    It was discovered that PHP incorrectly handled certain URLs.

    An attacker could possibly use this issue to expose sensitive information.

    (CVE-2020-7066)

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

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-4330-2");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  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:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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-2020-7065");

  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:"2020/04/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libapache2-mod-php7.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libphp7.4-embed");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-bcmath");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-bz2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-cgi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-cli");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-curl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-dba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-enchant");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-fpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-gd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-gmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-imap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-interbase");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-intl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-json");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-mbstring");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-odbc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-opcache");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-phpdbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-pspell");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-readline");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-snmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-soap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-sqlite3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-sybase");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-tidy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-xml");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-xmlrpc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-xsl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4-zip");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2020-2024 Canonical, Inc. / NASL script (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/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);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 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': '20.04', 'pkgname': 'libapache2-mod-php7.4', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libphp7.4-embed', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-bcmath', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-bz2', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-cgi', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-cli', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-common', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-curl', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-dba', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-dev', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-enchant', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-fpm', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-gd', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-gmp', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-imap', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-interbase', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-intl', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-json', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-ldap', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-mbstring', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-mysql', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-odbc', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-opcache', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-pgsql', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-phpdbg', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-pspell', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-readline', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-snmp', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-soap', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-sqlite3', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-sybase', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-tidy', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-xml', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-xmlrpc', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-xsl', 'pkgver': '7.4.3-4ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'php7.4-zip', 'pkgver': '7.4.3-4ubuntu1.1'}
];

var flag = 0;
foreach var 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)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_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');
}