Oracle Linux 8 : postgresql:13 (ELSA-2023-7581)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2023-7581.
##

include('compat.inc');

if (description)
{
  script_id(186509);
  script_version("1.4");
  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-0060-S");
  script_xref(name:"IAVB", value:"2023-B-0088-S");

  script_name(english:"Oracle Linux 8 : postgresql:13 (ELSA-2023-7581)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ELSA-2023-7581 advisory.

  - 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)

  - 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:              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:              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)

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://linux.oracle.com/errata/ELSA-2023-7581.html");
  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-2023-5869");

  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:"2023/11/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/12/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:oracle:linux:8::appstream");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:pg_repack");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:pgaudit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgres-decoderbufs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql-contrib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql-docs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql-plperl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql-plpython3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql-pltcl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql-server-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql-test-rpm-macros");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql-upgrade");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:postgresql-upgrade-devel");
  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:"Oracle Linux 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/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_release = get_kb_item("Host/RedHat/release");
if (isnull(os_release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:os_release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 8', 'Oracle Linux ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) 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$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);

var module_ver = get_kb_item('Host/RedHat/appstream/postgresql');
if (isnull(module_ver)) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module postgresql:13');
if ('13' >!< module_ver) audit(AUDIT_PACKAGE_NOT_AFFECTED, 'Module postgresql:' + module_ver);

var appstreams = {
    'postgresql:13': [
      {'reference':'pg_repack-1.4.6-3.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'pgaudit-1.5.0-1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgres-decoderbufs-0.10.0-2.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-contrib-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-docs-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-plperl-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-plpython3-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-pltcl-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-server-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-server-devel-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-static-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-test-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-test-rpm-macros-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-upgrade-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-upgrade-devel-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'pg_repack-1.4.6-3.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'pgaudit-1.5.0-1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgres-decoderbufs-0.10.0-2.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-contrib-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-docs-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-plperl-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-plpython3-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-pltcl-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-server-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-server-devel-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-static-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-test-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-test-rpm-macros-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-upgrade-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'postgresql-upgrade-devel-13.13-1.0.1.module+el8.9.0+90098+1560b6c2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
    ]
};

var flag = 0;
var appstreams_found = 0;
foreach var module (keys(appstreams)) {
  var appstream = NULL;
  var appstream_name = NULL;
  var appstream_version = NULL;
  var appstream_split = split(module, sep:':', keep:FALSE);
  if (!empty_or_null(appstream_split)) {
    appstream_name = appstream_split[0];
    appstream_version = appstream_split[1];
    if (!empty_or_null(appstream_name)) appstream = get_one_kb_item('Host/RedHat/appstream/' + appstream_name);
  }
  if (!empty_or_null(appstream) && appstream_version == appstream || appstream_name == 'all') {
    appstreams_found++;
    foreach var package_array ( appstreams[module] ) {
      var reference = NULL;
      var _release = NULL;
      var sp = NULL;
      var _cpu = NULL;
      var el_string = NULL;
      var rpm_spec_vers_cmp = NULL;
      var epoch = NULL;
      var allowmaj = NULL;
      if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
      if (!empty_or_null(package_array['release'])) _release = 'EL' + package_array['release'];
      if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
      if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
      if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
      if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
      if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
      if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
      if (reference && _release) {
        if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
      }
    }
  }
}

if (!appstreams_found) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module postgresql:13');

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'pg_repack / pgaudit / postgres-decoderbufs / etc');
}