Ubuntu 14.04 LTS / 16.04 LTS : PostgreSQL vulnerabilities (USN-3066-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3066-1. 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(93047);
  script_version("2.12");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");

  script_cve_id("CVE-2016-5423", "CVE-2016-5424");
  script_xref(name:"USN", value:"3066-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS : PostgreSQL vulnerabilities (USN-3066-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"Heikki Linnakangas discovered that PostgreSQL incorrectly handled
certain nested CASE/WHEN expressions. A remote attacker could possibly
use this issue to cause PostgreSQL to crash, resulting in a denial of
service. (CVE-2016-5423)

Nathan Bossart discovered that PostgreSQL incorrectly handled special
characters in database and role names. A remote attacker could
possibly use this issue to escalate privileges. (CVE-2016-5424).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-3066-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/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:L/UI:N/S:U/C:L/I:H/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-2016-5423");

  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:"2016/12/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/08/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/08/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-9.3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-9.5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-client-9.3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-client-9.5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-contrib-9.3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-contrib-9.5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plperl-9.3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plperl-9.5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plpython-9.3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plpython-9.5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plpython3-9.3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plpython3-9.5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-pltcl-9.3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-pltcl-9.5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-server-dev-9.3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-server-dev-9.5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libecpg-compat3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libecpg-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libecpg6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpgtypes3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpq-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpq5");
  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) 2016-2023 Canonical, Inc. / NASL script (C) 2016-2023 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 (! ('14.04' >< os_release || '16.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 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': '14.04', 'pkgname': 'libecpg-compat3', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'libecpg-dev', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'libecpg6', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'libpgtypes3', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'libpq-dev', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'libpq5', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'postgresql-9.3', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'postgresql-client-9.3', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'postgresql-contrib-9.3', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'postgresql-plperl-9.3', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'postgresql-plpython-9.3', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'postgresql-plpython3-9.3', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'postgresql-pltcl-9.3', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '14.04', 'pkgname': 'postgresql-server-dev-9.3', 'pkgver': '9.3.14-0ubuntu0.14.04'},
    {'osver': '16.04', 'pkgname': 'libecpg-compat3', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'libecpg-dev', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'libecpg6', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'libpgtypes3', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'libpq-dev', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'libpq5', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'postgresql-9.5', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'postgresql-client-9.5', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'postgresql-contrib-9.5', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'postgresql-plperl-9.5', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'postgresql-plpython-9.5', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'postgresql-plpython3-9.5', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'postgresql-pltcl-9.5', 'pkgver': '9.5.4-0ubuntu0.16.04'},
    {'osver': '16.04', 'pkgname': 'postgresql-server-dev-9.5', 'pkgver': '9.5.4-0ubuntu0.16.04'}
];

var flag = 0;
foreach 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)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libecpg-compat3 / libecpg-dev / libecpg6 / libpgtypes3 / libpq-dev / etc');
}