Ubuntu 16.04 ESM : PostgreSQL vulnerabilities (USN-5645-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5645-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(165526);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/10");

  script_cve_id("CVE-2021-23214", "CVE-2021-32027");
  script_xref(name:"USN", value:"5645-1");

  script_name(english:"Ubuntu 16.04 ESM : PostgreSQL vulnerabilities (USN-5645-1)");

  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 16.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in
the USN-5645-1 advisory.

  - When the server is configured to use trust authentication with a clientcert requirement or to use cert
    authentication, a man-in-the-middle attacker can inject arbitrary SQL queries when a connection is first
    established, despite the use of SSL certificate verification and encryption. (CVE-2021-23214)

  - A flaw was found in postgresql in versions before 13.3, before 12.7, before 11.12, before 10.17 and before
    9.6.22. While modifying certain SQL array values, missing bounds checks let authenticated database users
    write arbitrary bytes to a wide area of server memory. The highest threat from this vulnerability is to
    data confidentiality and integrity as well as system availability. (CVE-2021-32027)

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-5645-1");
  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:H/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-2021-32027");

  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:"2021/05/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/09/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/09/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
  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:"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-9.5");
  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-9.5");
  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-plpython3-9.5");
  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-9.5");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2022-2023 Canonical, Inc. / NASL script (C) 2022-2023 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 (! ('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': 'libecpg-compat3', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libecpg-dev', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libecpg6', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libpgtypes3', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libpq-dev', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libpq5', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'postgresql-9.5', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'postgresql-client-9.5', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'postgresql-contrib-9.5', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'postgresql-plperl-9.5', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'postgresql-plpython-9.5', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'postgresql-plpython3-9.5', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'postgresql-pltcl-9.5', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'postgresql-server-dev-9.5', 'pkgver': '9.5.25-0ubuntu0.16.04.1+esm1'}
];

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');
}