Debian DSA-5554-1 : postgresql-13 - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-5554. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(185521);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/16");

  script_cve_id(
    "CVE-2023-5868",
    "CVE-2023-5869",
    "CVE-2023-5870",
    "CVE-2023-39417"
  );
  script_xref(name:"IAVB", value:"2023-B-0088-S");

  script_name(english:"Debian DSA-5554-1 : postgresql-13 - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-5554 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)

  - PostgreSQL Project reports:              Certain aggregate function calls receiving unknown-type
    arguments could disclose bytes of server memory from the end of             the unknown-type value to
    the next zero byte. One typically             gets an unknown-type value via a string literal having no
    type             designation. We have not confirmed or ruled out viability of             attacks that
    arrange for presence of notable, confidential             information in disclosed bytes.
    (CVE-2023-5868)

  - PostgreSQL Project reports:              While modifying certain SQL array values, missing
    overflow checks let authenticated database users write             arbitrary bytes to a memory area that
    facilitates             arbitrary code execution. Missing overflow checks also             let
    authenticated database users read a wide area of             server memory. The CVE-2021-32027 fix covered
    some             attacks of this description, but it missed others.            (CVE-2023-5869)

  - PostgreSQL Project reports:              Documentation says the pg_cancel_backend role cannot
    signal a backend owned by a superuser. On the             contrary, it can signal background workers,
    including             the logical replication launcher. It can signal             autovacuum workers and
    the autovacuum launcher.             Signaling autovacuum workers and those two launchers
    provides no meaningful exploit, so exploiting this             vulnerability requires a non-core extension
    with a             less-resilient background worker. For example, a             non-core background worker
    that does not auto-restart             would experience a denial of service with respect to
    that particular background worker.            (CVE-2023-5870)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://security-tracker.debian.org/tracker/source-package/postgresql-13
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1964ded4");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2023/dsa-5554");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-39417");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-5868");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-5869");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-5870");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/postgresql-13");
  script_set_attribute(attribute:"solution", value:
"Upgrade the postgresql-13 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-2023-5869");

  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:"2023/11/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/11/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libecpg-compat3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libecpg-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libecpg6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpgtypes3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpq-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpq5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:postgresql-13");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:postgresql-client-13");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:postgresql-doc-13");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:postgresql-plperl-13");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:postgresql-plpython3-13");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:postgresql-pltcl-13");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:postgresql-server-dev-13");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  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:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/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);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(11)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 11.0', 'Debian ' + debian_release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '11.0', 'prefix': 'libecpg-compat3', 'reference': '13.13-0+deb11u1'},
    {'release': '11.0', 'prefix': 'libecpg-dev', 'reference': '13.13-0+deb11u1'},
    {'release': '11.0', 'prefix': 'libecpg6', 'reference': '13.13-0+deb11u1'},
    {'release': '11.0', 'prefix': 'libpgtypes3', 'reference': '13.13-0+deb11u1'},
    {'release': '11.0', 'prefix': 'libpq-dev', 'reference': '13.13-0+deb11u1'},
    {'release': '11.0', 'prefix': 'libpq5', 'reference': '13.13-0+deb11u1'},
    {'release': '11.0', 'prefix': 'postgresql-13', 'reference': '13.13-0+deb11u1'},
    {'release': '11.0', 'prefix': 'postgresql-client-13', 'reference': '13.13-0+deb11u1'},
    {'release': '11.0', 'prefix': 'postgresql-doc-13', 'reference': '13.13-0+deb11u1'},
    {'release': '11.0', 'prefix': 'postgresql-plperl-13', 'reference': '13.13-0+deb11u1'},
    {'release': '11.0', 'prefix': 'postgresql-plpython3-13', 'reference': '13.13-0+deb11u1'},
    {'release': '11.0', 'prefix': 'postgresql-pltcl-13', 'reference': '13.13-0+deb11u1'},
    {'release': '11.0', 'prefix': 'postgresql-server-dev-13', 'reference': '13.13-0+deb11u1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var _release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (_release && prefix && reference) {
    if (deb_check(release:_release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_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');
}