Ubuntu 20.04 LTS / 22.04 LTS / 23.04 : PostgreSQL vulnerabilities (USN-6296-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6296-1. 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(179929);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/25");

  script_cve_id("CVE-2023-39417", "CVE-2023-39418");
  script_xref(name:"USN", value:"6296-1");
  script_xref(name:"IAVB", value:"2023-B-0060-S");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 23.04 : PostgreSQL vulnerabilities (USN-6296-1)");

  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 20.04 LTS / 22.04 LTS / 23.04 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-6296-1 advisory.

  - IN THE EXTENSION SCRIPT, a SQL Injection vulnerability was found in PostgreSQL if it uses @extowner@,
    @extschema@, or @extschema:...@ inside a quoting construct (dollar quoting, '', or ). If an
    administrator has installed files of a vulnerable, trusted, non-bundled extension, an attacker with
    database-level CREATE privilege can execute arbitrary code as the bootstrap superuser. (CVE-2023-39417)

  - A vulnerability was found in PostgreSQL with the use of the MERGE command, which fails to test new rows
    against row security policies defined for UPDATE and SELECT. If UPDATE and SELECT policies forbid some
    rows that INSERT policies do not forbid, a user could store such rows. (CVE-2023-39418)

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-6296-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  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-2023-39417");

  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:"2023/08/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/08/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/08/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:23.04");
  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-12");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-14");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-15");
  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-14");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-client-15");
  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-14");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plperl-15");
  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-plpython3-14");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-plpython3-15");
  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-14");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-pltcl-15");
  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-14");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postgresql-server-dev-15");
  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) 2023 Canonical, Inc. / NASL script (C) 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 (! ('20.04' >< os_release || '22.04' >< os_release || '23.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 23.04', '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': '20.04', 'pkgname': 'libecpg-compat3', 'pkgver': '12.16-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libecpg-dev', 'pkgver': '12.16-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libecpg6', 'pkgver': '12.16-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libpgtypes3', 'pkgver': '12.16-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libpq-dev', 'pkgver': '12.16-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libpq5', 'pkgver': '12.16-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'postgresql-12', 'pkgver': '12.16-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'postgresql-client-12', 'pkgver': '12.16-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'postgresql-plperl-12', 'pkgver': '12.16-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'postgresql-plpython3-12', 'pkgver': '12.16-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'postgresql-pltcl-12', 'pkgver': '12.16-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'postgresql-server-dev-12', 'pkgver': '12.16-0ubuntu0.20.04.1'},
    {'osver': '22.04', 'pkgname': 'libecpg-compat3', 'pkgver': '14.9-0ubuntu0.22.04.1'},
    {'osver': '22.04', 'pkgname': 'libecpg-dev', 'pkgver': '14.9-0ubuntu0.22.04.1'},
    {'osver': '22.04', 'pkgname': 'libecpg6', 'pkgver': '14.9-0ubuntu0.22.04.1'},
    {'osver': '22.04', 'pkgname': 'libpgtypes3', 'pkgver': '14.9-0ubuntu0.22.04.1'},
    {'osver': '22.04', 'pkgname': 'libpq-dev', 'pkgver': '14.9-0ubuntu0.22.04.1'},
    {'osver': '22.04', 'pkgname': 'libpq5', 'pkgver': '14.9-0ubuntu0.22.04.1'},
    {'osver': '22.04', 'pkgname': 'postgresql-14', 'pkgver': '14.9-0ubuntu0.22.04.1'},
    {'osver': '22.04', 'pkgname': 'postgresql-client-14', 'pkgver': '14.9-0ubuntu0.22.04.1'},
    {'osver': '22.04', 'pkgname': 'postgresql-plperl-14', 'pkgver': '14.9-0ubuntu0.22.04.1'},
    {'osver': '22.04', 'pkgname': 'postgresql-plpython3-14', 'pkgver': '14.9-0ubuntu0.22.04.1'},
    {'osver': '22.04', 'pkgname': 'postgresql-pltcl-14', 'pkgver': '14.9-0ubuntu0.22.04.1'},
    {'osver': '22.04', 'pkgname': 'postgresql-server-dev-14', 'pkgver': '14.9-0ubuntu0.22.04.1'},
    {'osver': '23.04', 'pkgname': 'libecpg-compat3', 'pkgver': '15.4-0ubuntu0.23.04.1'},
    {'osver': '23.04', 'pkgname': 'libecpg-dev', 'pkgver': '15.4-0ubuntu0.23.04.1'},
    {'osver': '23.04', 'pkgname': 'libecpg6', 'pkgver': '15.4-0ubuntu0.23.04.1'},
    {'osver': '23.04', 'pkgname': 'libpgtypes3', 'pkgver': '15.4-0ubuntu0.23.04.1'},
    {'osver': '23.04', 'pkgname': 'libpq-dev', 'pkgver': '15.4-0ubuntu0.23.04.1'},
    {'osver': '23.04', 'pkgname': 'libpq5', 'pkgver': '15.4-0ubuntu0.23.04.1'},
    {'osver': '23.04', 'pkgname': 'postgresql-15', 'pkgver': '15.4-0ubuntu0.23.04.1'},
    {'osver': '23.04', 'pkgname': 'postgresql-client-15', 'pkgver': '15.4-0ubuntu0.23.04.1'},
    {'osver': '23.04', 'pkgname': 'postgresql-plperl-15', 'pkgver': '15.4-0ubuntu0.23.04.1'},
    {'osver': '23.04', 'pkgname': 'postgresql-plpython3-15', 'pkgver': '15.4-0ubuntu0.23.04.1'},
    {'osver': '23.04', 'pkgname': 'postgresql-pltcl-15', 'pkgver': '15.4-0ubuntu0.23.04.1'},
    {'osver': '23.04', 'pkgname': 'postgresql-server-dev-15', 'pkgver': '15.4-0ubuntu0.23.04.1'}
];

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_HOLE,
    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');
}