Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : PostgreSQL vulnerabilities (USN-4472-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4472-1. 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(139848);
  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/21");

  script_cve_id("CVE-2020-14349", "CVE-2020-14350");
  script_xref(name:"USN", value:"4472-1");
  script_xref(name:"IAVB", value:"2020-B-0047-S");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : PostgreSQL vulnerabilities (USN-4472-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"Noah Misch discovered that PostgreSQL incorrectly handled the
search_path setting when used with logical replication. A remote
attacker could possibly use this issue to execute arbitrary SQL code.
This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.
(CVE-2020-14349) Andres Freund discovered that PostgreSQL incorrectly
handled search path elements in CREATE EXTENSION. A remote attacker
could possibly use this issue to execute arbitrary SQL code.
(CVE-2020-14350).

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-4472-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/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:L/AC:L/PR:L/UI:R/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-2020-14349");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-14350");

  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:"2020/08/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/08/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/08/26");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-12");
  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-10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-client-12");
  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-10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plperl-12");
  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-10");
  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-plpython3-10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plpython3-12");
  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-10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-pltcl-12");
  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-10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-server-dev-12");
  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:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-: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_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2020-2023 Canonical, Inc. / NASL script (C) 2020-2023 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 || '18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 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': '16.04', 'pkgname': 'libecpg-compat3', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'libecpg-dev', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'libecpg6', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpgtypes3', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpq-dev', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'libpq5', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'postgresql-9.5', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'postgresql-client-9.5', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'postgresql-contrib-9.5', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'postgresql-plperl-9.5', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'postgresql-plpython-9.5', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'postgresql-plpython3-9.5', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'postgresql-pltcl-9.5', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'postgresql-server-dev-9.5', 'pkgver': '9.5.23-0ubuntu0.16.04.1'},
    {'osver': '18.04', 'pkgname': 'libecpg-compat3', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'libecpg-dev', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'libecpg6', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'libpgtypes3', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'libpq-dev', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'libpq5', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'postgresql-10', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'postgresql-client-10', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'postgresql-plperl-10', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'postgresql-plpython-10', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'postgresql-plpython3-10', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'postgresql-pltcl-10', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'postgresql-server-dev-10', 'pkgver': '10.14-0ubuntu0.18.04.1'},
    {'osver': '20.04', 'pkgname': 'libecpg-compat3', 'pkgver': '12.4-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libecpg-dev', 'pkgver': '12.4-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libecpg6', 'pkgver': '12.4-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libpgtypes3', 'pkgver': '12.4-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libpq-dev', 'pkgver': '12.4-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libpq5', 'pkgver': '12.4-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'postgresql-12', 'pkgver': '12.4-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'postgresql-client-12', 'pkgver': '12.4-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'postgresql-plperl-12', 'pkgver': '12.4-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'postgresql-plpython3-12', 'pkgver': '12.4-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'postgresql-pltcl-12', 'pkgver': '12.4-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'postgresql-server-dev-12', 'pkgver': '12.4-0ubuntu0.20.04.1'}
];

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');
}