Ubuntu 16.04 LTS : PHP regression (USN-4279-2)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4279-2. 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(133840);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/29");
  script_xref(name:"USN", value:"4279-2");

  script_name(english:"Ubuntu 16.04 LTS : PHP regression (USN-4279-2)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 16.04 LTS host has packages installed that are affected by a vulnerability as referenced in the
USN-4279-2 advisory.

    USN-4279-1 fixed vulnerabilities in PHP. The updated packages caused a regression. This update fixes the
    problem.

    We apologize for the inconvenience.

    Original advisory details:

    It was discovered that PHP incorrectly handled certain scripts.

    An attacker could possibly use this issue to cause a denial of service.

    This issue only affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM and Ubuntu 16.04 LTS.

    (CVE-2015-9253)

    It was discovered that PHP incorrectly handled certain inputs. An attacker

    could possibly use this issue to expose sensitive information.

    (CVE-2020-7059)

    It was discovered that PHP incorrectly handled certain inputs.

    An attacker could possibly use this issue to execute arbitrary code.

    This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS

    and Ubuntu 19.10. (CVE-2020-7060)

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

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://ubuntu.com/security/notices/USN-4279-2");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_attribute(attribute:"risk_factor", value:"Medium");

  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:"2018/02/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/02/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libapache2-mod-php7.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libphp7.0-embed");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-bcmath");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-bz2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-cgi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-cli");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-curl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-dba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-enchant");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-fpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-gd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-gmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-imap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-interbase");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-intl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-json");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-mbstring");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-mcrypt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-odbc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-opcache");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-phpdbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-pspell");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-readline");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-recode");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-snmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-soap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-sqlite3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-sybase");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-tidy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-xml");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-xmlrpc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-xsl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0-zip");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-: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 (! ('16.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04', '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': '16.04', 'pkgname': 'libapache2-mod-php7.0', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'libphp7.0-embed', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-bcmath', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-bz2', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-cgi', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-cli', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-common', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-curl', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-dba', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-dev', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-enchant', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-fpm', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-gd', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-gmp', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-imap', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-interbase', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-intl', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-json', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-ldap', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-mbstring', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-mcrypt', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-mysql', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-odbc', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-opcache', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-pgsql', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-phpdbg', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-pspell', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-readline', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-recode', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-snmp', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-soap', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-sqlite3', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-sybase', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-tidy', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-xml', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-xmlrpc', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-xsl', 'pkgver': '7.0.33-0ubuntu0.16.04.12'},
    {'osver': '16.04', 'pkgname': 'php7.0-zip', 'pkgver': '7.0.33-0ubuntu0.16.04.12'}
];

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-php7.0 / libphp7.0-embed / php7.0 / php7.0-bcmath / etc');
}