Linux Distros Unpatched Vulnerability : CVE-2017-7963

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(253193);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/08/21");

  script_cve_id("CVE-2017-7963");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2017-7963");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - The GNU Multiple Precision Arithmetic Library (GMP) interfaces for PHP through 7.1.4 allow attackers to
    cause a denial of service (memory consumption and application crash) via operations on long strings. NOTE:
    the vendor disputes this, stating There is no security issue here, because GMP safely aborts in case of
    an OOM condition. The only attack vector here is denial of service. However, if you allow attacker-
    controlled, unbounded allocations you have a DoS vector regardless of GMP's OOM behavior. (CVE-2017-7963)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2017-7963");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  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:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-7963");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/04/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/08/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php5");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl", "set_linux_os_id.nasl");
  script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched", "Host/OS/identifier");
  script_require_ports("Host/OS/Ubuntu Linux-14.04");

  exit(0);
}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/Debian/dpkg-l"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "libapache2-mod-php5"},
          {"reference": "libapache2-mod-php5filter"},
          {"reference": "libphp5-embed"},
          {"reference": "php-pear"},
          {"reference": "php5"},
          {"reference": "php5-cgi"},
          {"reference": "php5-cli"},
          {"reference": "php5-common"},
          {"reference": "php5-curl"},
          {"reference": "php5-dbg"},
          {"reference": "php5-dev"},
          {"reference": "php5-enchant"},
          {"reference": "php5-fpm"},
          {"reference": "php5-gd"},
          {"reference": "php5-gmp"},
          {"reference": "php5-intl"},
          {"reference": "php5-ldap"},
          {"reference": "php5-mysql"},
          {"reference": "php5-mysqlnd"},
          {"reference": "php5-odbc"},
          {"reference": "php5-pgsql"},
          {"reference": "php5-pspell"},
          {"reference": "php5-readline"},
          {"reference": "php5-recode"},
          {"reference": "php5-snmp"},
          {"reference": "php5-sqlite"},
          {"reference": "php5-sybase"},
          {"reference": "php5-tidy"},
          {"reference": "php5-xmlrpc"},
          {"reference": "php5-xsl"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}