Oracle Linux 8 : bind (ELSA-2020-1845)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2020-1845.
##

include('compat.inc');

if (description)
{
  script_id(180987);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/07");

  script_cve_id("CVE-2019-6477");
  script_xref(name:"IAVA", value:"2019-A-0434-S");

  script_name(english:"Oracle Linux 8 : bind (ELSA-2020-1845)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the
ELSA-2020-1845 advisory.

  - With pipelining enabled each incoming query on a TCP connection requires a similar resource allocation to
    a query received via UDP or via TCP without pipelining enabled. A client using a TCP-pipelined connection
    to a server could consume more resources than the server has been provisioned to handle. When a TCP
    connection with a large number of pipelined queries is closed, the load on the server releasing these
    multiple resources can cause it to become unresponsive, even for queries that can be answered
    authoritatively or from cache. (This is most likely to be perceived as an intermittent server problem).
    (CVE-2019-6477)

Note that Nessus has not tested for this issue 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-2020-1845.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:N/UI:N/S:U/C:N/I:N/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-2019-6477");

  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:"2019/11/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-chroot");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-export-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-export-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-libs-lite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-license");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-lite-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-pkcs11");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-pkcs11-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-pkcs11-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-pkcs11-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-sdb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-sdb-chroot");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3-bind");
  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 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 pkgs = [
    {'reference':'bind-license-9.11.13-3.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'python3-bind-9.11.13-3.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-chroot-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-devel-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-devel-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-utils-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-sdb-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-sdb-chroot-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-utils-9.11.13-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-devel-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-devel-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.13-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-chroot-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-devel-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-devel-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-export-libs-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-libs-lite-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-lite-devel-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-devel-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-libs-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-pkcs11-utils-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-sdb-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-sdb-chroot-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
    {'reference':'bind-utils-9.11.13-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  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;
  var exists_check = 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 (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference && _release) {
    if (exists_check) {
        if (rpm_exists(release:_release, rpm:exists_check) && 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++;
    } else {
        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 (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      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, 'bind / bind-chroot / bind-devel / etc');
}